Dissertations / Theses: 'Prosthetic Dentistry'

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Walsh, Jennifer Mary. "Evaluation of apatite-mullite glass-ceramics for use in restorative dentistry." Thesis, University of Sheffield, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369896.

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Murdoch, Fiona Elizabeth. "The potential role of oral staphylococci in prosthetic valve endocarditis." Thesis, University of Birmingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289742.

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Purcell, Bradley Allen. "Prosthetic Complications in Mandibular Fixed-Removable Implant Prostheses Opposed by Complete Dentures: A 5-9 years Analysis." The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1419870196.

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O'Sullivan, Dominic. "The effect of implant geometry upon the primary stability of dental implants." Thesis, University of Bristol, 2001. http://hdl.handle.net/1983/339010c1-63ee-4eb9-b03c-b3a2b9b89dbf.

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Jamjoom, Faris Zainalabedeen. "Positional Accuracy of Prosthetic Treatment Plan Incorporation Into Cone-beam Computed Tomography Scans Using Surface Scan Superimposition." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1498241824233391.

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Goyatá, Frederico dos Reis. "Avaliação de parâmetros clínicos relacionados com a longevidade de restaurações cerâmicas livres de metal." Universidade de Taubaté, 2010. http://www.bdtd.unitau.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=405.

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Proporcionar longevidade clínica às restaurações cerâmicas deve ser um dos objetivos principais dos cirurgiões-dentistas ao realizar um tratamento protético. Objetivo: Correlacionar a influência do tratamento interno do substrato cerâmico e do tipo de polimento da superfície cerâmica externa com a efetividade clínica de restaurações com sistemas cerâmicos livres de metal. Métodos: Foram elaborados quatro artigos científicos. No Capítulo 1, apresentou-se um estudo de revisão da literatura a respeito dos métodos de tratamento de superfície para as cerâmicas reforçadas por óxido de zircônia e a implicação clínica deste procedimento na resistência da união deste sistema cerâmico quando realizada cimentação adesiva. Os Capítulos de 2 a 4 são representativos de trabalhos in vitro. No Capítulo 2, foi delineado um experimento com o objetivo de avaliar a influência do tratamento da superfície interna da cerâmica e do tipo de cimento (resinoso dual ou autoadesivo) sobre a resistência da união da interface cerâmicacimento por meio de ensaio de microcisalhamento. Os tratamentos de superfície avaliados foram: condicionamento com ácido fluorídrico a 10%, jateamento com óxido de alumínio 110μm, silicatização e junção de jateamento com óxido de alumínio 110μm e aplicação de um agente silano específicos. O teste foi realizado após o período de 24 horas e os resultados expressos em MPa. Adicionalmente, foi avaliada quantitativamente e qualitativamente a modificação promovida na superfície interna do substrato cerâmico por cada um dos tratamentos de superfície avaliados. No Capítulo 3, o mesmo delineamento executado no Capítulo 2 foi realizado, porém avaliando-se a resistência à degradação hidrolítica promovida pelos mesmos métodos de tratamento da superfície interna da cerâmica, com a realização do ensaio de resistência da união ao microcisalhamento após 24 horas e seis meses de armazenagem em água. No Capítulo 4, foi avaliada a eficácia de diferentes métodos de polimento da superfície cerâmica externa por meio de um ensaio de rugosidade de superfície e microscopia de força atômica, sendo ainda realizada a comparação entre os sistemas cerâmicos pelo ensaio de resistência à tração diametral. Conclusões: Com este trabalho foi possível determinar a importância do tratamento da superfície interna das cerâmicas previamente à cimentação adesiva, objetivando aprimorar a resistência da união da interface cerâmica-cimento, conferindo longevidade às restaurações cerâmicas. Com este propósito, para sistemas cerâmicos reforçados por zircônia, tratamentos de superfície que promovam modificações mecânicas e químicas da superfície cerâmica devem ser utilizados. Também foi possível observar que as restaurações cerâmicas depois de cimentadas e ajustadas clinicamente, devem ser submetidas a técnicas de polimento, sendo que a efetividade desta etapa é dependente da técnica de polimento executada.
Make the clinical longevity to ceramic restorations has must been a principal objective in prosthetic treatment realized for a dentist. Purpose: Correlation the influence of internal treatment in ceramic substrate and polishing method to ceramic external surface with clinical effectiveness in the metal free ceramic systems. Methods: Was elaborated four scientific articles. In the chapter one, present a literature review study with describes the treatment surface methods to ceramics reinforced to zirconium oxide and the clinical importance this procedure to the bond strength when realized adhesive cementation with ceramic system. The chapter two at four represented in vitro studies. In the chapter two, was delineated a experiment with the objective to evaluated the influence internal treatment in ceramic and the type of cement (dual cure resin and self adhesive) on the bond strength in interface ceramic-cement with microshear test. The surface treatments was: hydrofluoric acid conditioned, sandblasting using aluminum oxide 110μm, silica coating and sandblasting using aluminum oxide 110μm associated with silane agent specified. The test was performed after 24 hours and results presents in Mpa. In addition, was a quantitative and qualitatively evaluation the modification to improved in internal surface in ceramic substrate for the each surface treatment evaluated. In the chapter three, was realized the study assemble the chapter two, therefore evaluated the hydrophilic degradation improved to surface treatment internal ceramic with the microshear test after 24 hours and six months in water storage. In the chapter four, the efficacy in different polishing methods of external surface ceramic was evaluated by the surface roughness test and atomic force microscope, being even performed comparison between ceramic systems and the experiment of the diametral tensile strength. Conclusions: In this study, was possible to determinate the importance of internal surface treatment in ceramics previously adhesive cementation with objective the best bond strength in ceramic-cement interface to obtained longevity in ceramic restorations. With this objective, to ceramics reinforced to zirconium oxide, treatments surface that improve mechanical and chemistry modification to ceramic surface must be realized. Was possible too observed that ceramic restorations after cementations and clinical adjustments must be submitted the polishing techniques where the effectiveness is depended to polishing technique realized.

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Uono, Carla Rumi Hanada. ""Influência dos materiais restauradores protéticos na transmissão da carga oclusal : método da interferometria holográfica"." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/23/23137/tde-16112005-103452/.

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Apesar dos pesquisadores afirmarem que os materiais odontológicos restauradores, devido às suas diferentes propriedades mecânicas, influenciam na transmissão da carga para os tecidos de suporte, não foi encontrada comprovação científica concludente. Os trabalhos de análise da distribuição da carga oclusal com diferentes materiais de reconstrução protética não são concordantes em seus resultados. Assim, diante da importância da seleção de materiais restauradores protéticos no prognóstico da reabilitação oral, este trabalho se propôs a estudar a influência de coroas protéticas metalo-cerâmica e de resina, cimentadas no canino, na transmissão de tensões para o tecido ósseo em mandíbulas frescas de cães, utilizando o método de interferometria holográfica de dupla exposição. Seis hemi-mandíbulas frescas de cães da espécie Canis familiares foram fixadas em um dispositivo para garantir a invariabilidade da força aplicada durante o experimento. Uma carga de 0,98 N foi aplicada sobre as coroas, seguindo o longo eixo do dente. Pelo método de interferometria holográfica, foram obtidos 12 hologramas, 6 para cada grupo de amostras. As coroas metalo-cerâmicas apresentaram maior deslocamento, com movimento de intrusão no alvéolo, em relação às de resina. Os microdeslocamentos resultantes nas hemimandíbulas demonstraram comportamentos semelhantes de deflexão, porém, não foram encontradas diferenças estatisticamente significantes na distribuição das tensões ao osso, com relação aos dois tipos de coroas consideradas, demonstrando a influência da presença do ligamento periodontal.
Although researches assert that restoring dental material, due to their different mechanical properties, influences at load transmission to support tissues, it was not find any conclusive scientific evidence. Researches with finite element, implants and different prosthetic reconstruction material do not have an agreement in terms of results. So, considering the importance of prosthetic restoring material selection on oral rehabilitate prognosis, this assignment studied the influence of metaloceramic and resin prosthetics crowns, cemented on canine, during stress transmission to bony tissue of post-mortem dog mandibles, using double exposure holographic interferometry method. Three fresh mandibles were split into 6 hemi-mandibles, which were fixed in a proper device in order to assure the same applied force during the whole experiment. A 0,98 N load was applied to the crowns, following the long axis of the tooth. It was collect 12 holograms, 6 for each sample group. Metaloceramic crowns presented larger intrusion micromovement in the alveolus, comparing that of resin ones. The resulting micromovings in the hemimandibles presented similar deflecting behaviour. However, significant statistical differences on bone tension distribution have not been found, concerning the two types of previously referred crowns, demonstrating the influence of periodontal ligament.

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Maart, Ronel. "Aligning the clinical assessment practices with the assessment practices." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17888.

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Thesis (MPhil)--Stellenbosch University, 2011.
ENGLISH ABSTRACT: Removable Prosthetic Dentistry (PRO400) is a fourth year module of the undergraduate dentistry programme which consists of a large clinical component. After reviewing relevant literature and conducting module evaluations, clinical tests were introduced and implemented in 2008 as an additional clinical assessment method. The intention of introducing the clinical tests was an attempt to ensure that students were assessed fairly, that their theoretical knowledge and the ability to apply it clinically were properly assessed, and to provide feedback on their clinical performance. The purpose of this concurrent mixed methods study was to compare the relationship between the students‟ performance in the clinical tests and daily clinical grades with their theoretical performance in the PRO400 module. The second part of the study explored the academic staff s‟ perceptions of the clinical test as clinical assessment tool in the PRO400 module. The case study design enabled the researcher to explore the question at hand in considerable depth. The mixed methods approach was useful to capture the best of both the qualitative and quantitative approaches. For the quantitative data-collection, record reviews of the results of fourth-year dental students‟ who completed the PRO400 module at the end of 2007 were used, and included 110 students. For the qualitative component three full-time lecturers within the Prosthetic department were interviewed. The clinical test marks and clinical session marks of all the students (n=109) in PRO400 were compared to their theory mark of that year. The tests marks were entered into a spreadsheet in Microsoft Excel and the data analysis was done with the assistance of a statistician. The analytical abstraction method was used to assist with the qualitative data analysis; first the basic level of analysis was done in the narrative form, followed by second higher level of data analysis. The basic and higher levels of analysis were discussed under the following themes: clinical tests, student performances, alignment of theory and clinical assessment and personal influence on supervisors‟ assessment practices and attitude. Role-taking and the supervisors‟ perceptions and concerns regarding the students were explored as emergent themes. The quantitative findings were displayed using tables and graphs. Forty five students. clinical marks were 10% higher than their theory mark, while only 8 students. theory marks were 10% higher than their clinical test mark. There appeared to be hardly any relationship between the students. clinical daily grade assessment marks and their theory marks. The average theory mark was 47%, the average clinical test marks were 55% and the average daily clinical grade was 63%. Integration of the data obtained from the different data collection methods was done at the level of data interpretation. The clinical test as an assessment tool is well accepted by the supervisors and they agreed that it is more reliable and accurate than the clinical daily grade assessment method. The quantitative findings relate well to other reported studies that concluded that the daily grade was poorly correlated with the competency exams (a similar phenomenon in the clinical test of the PRO400 module). From the findings of this study it appeared that there is a better correlation of the clinical test mark and the theory mark, than clinical daily mark and the theory mark. This finding related well with the lecturers. views that the clinical tests were more reliable as a clinical assessment tool than the daily clinical mark.
AFRIKAANSE OPSOMMING: "Removable Prosthetic Dentistry (PRO400)" is 'n vierdejaar-module in die voorgraadse tandheelkundeprogram wat 'n groot kliniese komponent bevat. Na 'n oorsig gedoen is van die relevante literatuur, en nadat die module-evaluering afgehandel is, is kliniese toetse in 2008 ingevoer en geimplementeer as 'n bykomende metode van kliniese assessering. Die kliniese toetse is ingestel in 'n poging om te verseker dat studente se teoretiese kennis en hul vermoe om dit klinies toe te pas op . regverdige wyse geassesseer word en om terugvoer te kan gee oor die studente se kliniese prestasie. Die doel van hierdie studie, waarin gelyktydige gemengde metodes gebruik is, was om die verband tussen die studente se prestasie in die kliniese toetse, asook hul daaglikse kliniese punte en hul teoretiese prestasie in die PRO400-module vas te stel. Die tweede deel van die studie het ondersoek ingestel na die akademiese personeel se persepsies van die kliniese toets as 'n instrument vir kliniese assessering in die PRO400-module. 'n Dwarssnit-gevallestudie-ontwerp is gebruik en 'n gemengdemetode-benadering was nuttig om sowel kwalitatiewe as kwantitatiewe data in te samel. Vir die kwantitatiewe data-insamelingverslae is die uitslae van 109 vierdejaar-tandeheelkundestudente in die PRO400-module aan die einde van 2007 gebruik. Vir die kwalitatiewe data-insameling is onderhoude gevoer met drie voltydse dosente in die Prostetiese Tandheelkunde-departement. Die kliniese toetspunte en die kliniese sessiepunte van al die studente (n=109) in die PRO400-module is met hul teoriepunte van daardie jaar vergelyk. Die toetspunte is op 'n sigblad in Microsoft Excel ingevoer en die data-analise is met die hulp van 'n statistikus gedoen. Die analitiese abstraksiemetode is vir die analise van die kwalitatiewe data gebruik. Die basiese vlak van data-analise in die narratiewe vorm is eerste gedoen. Dit is gevolg deur 'n tweede, hoervlak-data-analise. Die basiese en hoer vlakke van analise is onder die volgende temas bespreek: kliniese toetse, studenteprestasie, ooreenstemming van teorie en kliniese assessering, en persoonlike invloed op studieleiers se assesseringspraktyke en houding. Rol-aanneming en die studieleiers se persepsies, asook kwessies rakende die studente is as ontluikende temas ondersoek. Die resultate van hierdie studie het aangetoon dat die kliniese punte van 45 studente 10% hoër was as hul teoriepunte, en dat slegs agt studente se teoriepunte 10% hoër as hul kliniese toetspunte was. Dit het geblyk dat daar feitlik geen verband was tussen die studente se kliniese daaglikse assesseringspunte en hul teoriepunte nie. Die gemiddelde teoriepunt was 47%, die gemiddelde kliniese toetspunt was 55% en die gemiddelde daaglikse kliniese punt was 63%. Al die studieleiers het die kliniese toets as assesseringsinstrument goed aanvaar en hulle het saamgestem dat dit meer betroubaar en akkuraat is as die daaglikse kliniese assesseringsmetode. Die kwantitatiewe bevindings hou goed verband met dié van soortgelyke studies waarin daar bevind is dat die daaglikse prestasie swak gekorreleer het met die bevoegdheidseksamen (ŉ soortgelyke beginsel as die kliniese toets van die Pro400). Dit het ook uit die bevindings van hierdie navorsing geblyk dat daar ŉ beter korrelasie is tussen die kliniese toetspunt en die teoriepunt as tussen die daaglikse kliniese punt en die teoriepunt. Hierdie bevinding het ŉ duidelike verband getoon met die dosente se siening dat die kliniese toetse as ŉ kliniese assesseringsinstrument meer betroubaar is as die daaglikse kliniese punt in die PRO400-module in die Tandheelkunde-program.

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Ribeiro, Ricardo Manuel Pereira. "Qual a eficácia clínica do sistema CEREC com os seus diferentes materiais para reabilitação em prótese fixa e sobre implantes?" Master's thesis, [s.n.], 2015. http://hdl.handle.net/10284/5061.

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Projeto de Pós-Graduação/Dissertação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária
Introdução: A evolução das tecnologias em todas as áreas de atividade tem mudado a maneira como se aborda os desafios que são impostos nos dias de hoje. Na medicina dentária tem acontecido o mesmo que na área da saúde em geral, uma resistência enorme às novas técnicas e tecnologias, mas o que é certo é que a era digital esta cada vez mais implantada e a ganhar sobre essa resistência. Os sistemas CAD/CAM já fazem parte integrante da reabilitação dentária, principalmente por via dos laboratórios dentários, mas também no consultório com o sistema CEREC que conseguiu colocar a tecnologia CAM/CAM em consultório ao dispor do médico, dentista e dos pacientes. Objetivos: Verificar, através de uma revisão bibliográfica a evolução dos sistemas CAD/CAM CEREC nos últimos anos. Pretende-se verificar a eficácia clinica deste sistema propriamente dito nos seus diversos materiais para as reabilitações de prótese fixa e reabilitações sobre impantes. Materiais e métodos: Na elaboração desta dissertação foi realizada uma revisão bibliográfica no período que vai desde 1994 até Março de 2015. Foram utilizadas bases de dados como Pubmed (medline), Elsevier, Scielo e GoogleAcademic, com as palavras-chave: “digital prosthetic dentistry”; “dental cad/cam”; “dental ceramics”; “CEREC”; “sistema CEREC”; “materiais CEREC”. Resultados: Nesta revisão foram verificados estudos que mostraram que reabilitações realizadas pelos sistemas CAM/CAM CEREC tiveram bom comportamento clinico nas diversas valências, estética, adaptação marginal, resistência ao desgaste entre outros parâmetros clínicos. Conclusão: Ao longo dos últimos 20 anos do sistema CEREC, muito se tem evoluído e certamente muito se vai continuar a evoluir. O resultado dessa evolução tem sido testado pelos variados estudos, mostrando que clinicamente é um sistema rápido e preciso. A medicina dentária eleva-se para outro nível com esta tecnologia e os profissionais da área ao perceberem isso vão certamente levar as consequências dessa evolução para o paciente, realizando tratamentos mais eficazes e rápidos sendo do ponto de vista clínico uma mais valia para todos. Introduction: The evolution of technology in all areas of activity has changed the way it addresses the challenges that are imposed today. In dentistry it has happened the same way as in health care in general, a huge resistance to new techniques and technologies, but what is certain is that the digital age is increasingly expanding and to getting over this resistance. CAD / CAM systems already form an integral part of the dental rehabilitation, mainly throughout dental laboratories, but also in the dentist’s office (with CEREC system) that places the CAD / CAM technology to the dentists and patients reach. Objectives: To determine, throughout a bibliographic review the evolution of the CEREC systems in past few years. This was intended to verify the clinical effectiveness of the system itself in the various materials it works with: for fixed prosthetic restorations and rehabilitations on impantes. Methods: In preparing this thesis a bibliographic review was performed in the period of 1994 to March de 2015. Databases were used as Pubmed (Medline), Elsevier, sceilo and googleacademic with the keywords "digital prosthetic dentistry" ; "Dental cad / cam" ;"Dental ceramics" ;"CEREC" ;"CEREC system" ;"CEREC materials." Results: In this review studies checked restorations made by the CEREC systems had good clinical behavior in the following various aspects: aesthetics, marginal fit, wear resistance and other clinical parameters. Conclusion: Over the last 20 years the CEREC system, much has developed and certainly much is going to keep evolving. The result of this evolution has been analised by various studies showing that clinically it is a very fast and precise system. Dentistry has been elevated to a whole new level with this technology and the professionals aswell, that being so, the consequences of this evolution will be led to the patient, the treatments will be faster and more effective, from the clinical point of view with an added value for everyone.

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Sarafidou, Katia [Verfasser], and Philipp [Akademischer Betreuer] Kohorst. "Load-bearing capacity of artificially aged zirconia fixed dental prostheses with heterogeneous abutment supports / Katia Sarafidou. Department of Prosthetic Dentistry and Biomedical Materials Science Centre of Dental, Oral and Maxillofacial Science Hannover Medical School. Betreuer: Philipp Kohorst." Hannover : Bibliothek der Medizinischen Hochschule Hannover, 2012. http://d-nb.info/1028535074/34.

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Monteiro, Viviana Manuela da Silva. "Distância interimplantar e formação de papila: revisão bibliográfica." Master's thesis, [s.n.], 2010. http://hdl.handle.net/10284/2350.

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Trabalho apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária
Nota Introdutória: Os implantes dentários constituem uma modalidade de tratamento bastante previsível para a reposição de dentes perdidos. Os implantes osteointegráveis, principalmente quando colocados em regiões anteriores, devem oferecer para além de excelente função, óptima estética e fonética, logo o critério para o sucesso envolve o estabelecimento do contorno de tecido mole, apresentando a área interproximal intacta. Objectivo: Esta revisão bibliográfica foi realizada com o intuito de avaliar, descrever o estado da arte no que concerne á obtenção e manutenção da papila gengival em reabilitações com implantes. Métodos: Através dos motores de busca Pub-med, Scielo-br, Science Direct Lilacs e B-on utilizando as palavras-chave, “interimplant distance”,”crestal bone remodeling”, “platform shifting”, “switch platform”, “papila gengival”, “bone loss”, “odontology distance interimplant”, “Relationship interimplant distance and height of the contact point in the formation of papilla”, “Interimplant distance in the formation on papilla” foram seleccionados 56 artigos científicos datados entre 1961 a 2010. Conclusão: Os implantes dentários do tipo cone Morse parecem favorecer a manutenção da estrutura óssea periimplantar relativamente aos implantes de conexão externa. Background: Dental implants are a fairly predictable treatment modality for replacing missing teeth. Osteointegraveis especially when the implants placed in anterior regions should offer excellent addition to function, optimal esthetics and phonetics, so the criterion for success involves the establishment of the contour of the soft tissue, showing the interproximal area intact. Objective: This literature review was conducted with the aim to evaluate, describe the state of the art with respect to obtaining and maintaining the gingival papilla in rehabilitation with implants. Methods: Through search engines Pub-med, Scielo Forums Lilacs and Science Direct, B-on using the keywords "interimplant distance", "odontology interimplant distance," "Relationship interimplant distance and height of the contact point in the formation of papilla, "interimplant in the distance on papilla formation” have been selected 50 articles dating from 1961 to 2010. Conclusion: Dental implants cone Morse seem to favor the maintenance of periimplant bone structure in relation to external connection implants.

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Teixeira, Erica Cappelletto Nogueira. "Dentists’ prescribing practices for antibiotic prophylaxis in patients with large prosthetic joints." Thesis, University of Iowa, 2018. https://ir.uiowa.edu/etd/6509.

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With an aging population and with the number of patients with large prosthetic joints increasing, the recommendation of antibiotic use in this specific population has generated significant discussion. Dentists often treat patients with large prosthetic joints; however, little is known regarding the prescribing practices of dental providers. This cross-sectional study carried out in the State of Iowa, United States, evaluated whether dentists were familiar, followed, and were satisfied with the 2015 American Dental Association Clinical Guidelines and the 2016 American Academy of Orthopaedic Surgeons Appropriate Use Criteria (AUC), and whether dentists responses were associated with demographic and provider characteristics. Dentists’ concerns about antibiotic resistance, medical legal aspects, and adverse effects related to using antibiotic prophylaxis were also examined. Of the 1521 surveys that were sent by mail, a total of 635 were returned, for a response rate of 41.7%. Our results confirm that dental practitioners were very concerned about antibiotic resistance (43.9%) compared to 5.23% who were not at all concerned. In addition, female subjects were significantly more likely to be very concerned about antibiotic resistance than were male subjects (50.9% vs 41.4%; p=0.0376). Moreover, subjects that practiced in urban areas were more likely to be very concerned about antibiotic resistance that those practicing in rural areas (47.9%vs 37.5%; p=0.0157). We also observed that for a healthy patient, 28.9% of dentists would never recommend antibiotics. On the other hand, 44.9% of the respondents would recommend antibiotic premedication within the first 2 years since prosthetic joint replacement, 14.1% would recommend it within the first year, and 6.9% would recommend it for life. Dentists were aware of the lack of effectiveness of antibiotic prophylaxis in preventing prosthetic joint infection. However, premedication recommendations by physicians and patient preferences influenced dentist’s prescribing practices. Overall, dentists’ recommendations for the use of antibiotic for patients with prosthetic joints undergoing dental procedures varied depending on the health status of the patient, the dental procedure to be performed, the time since joint surgery, physician’s recommendations and patients preferences.

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Al, Quaran Firas A. M. "Factors influencing the acceptance of complete dentures." Thesis, Queen's University Belfast, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287228.

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Jönsson, Anna, and Emily Brettéus. "dentÆd : Utveckling av medicintekniskt instrument som ökar säkerheten samt underlättar vid oral protetik." Thesis, Högskolan i Halmstad, Biomekanik och biomedicin, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-25510.

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Initiativet till projektet togs av tandvårdspersonal på Specialisttandvården i Halmstad då de upplevde problem vid arbete med oral protetik. Problemet, som projektet även bygger på, innebär att komponenter tappas och på grund av gravitationen samt patientens position riskeras att inhaleras eller sväljas. Detta innebär ett stress- och orosmoment, vilket bidrar till en försämrad psykosocial arbetsmiljö för tandvårdspersonalen. 2008 infördes det statliga tandvårdsstödet i Sverige vilket innebär en reducerad kostnad för protetikingrepp som lett till att fler har råd med oral protetik. Därför blir problemet mer och mer utbrett, vilket gjort kravet på en lösning mer eftertraktad. I projektet har dynamisk produktutveckling tillämpats med stort fokus på involvering av framtida användare. Artikelsökning, observation och enkätundersökning i genomförd produktdefinitionsfas lade grunden till projektet. Olika konceptgenererings- och utvärderingsmetoder tillämpades och födde den slutgiltiga prototypen. Under hela projektets gång har en kontinuerlig dialog och testning hos uppdragsgivarna utförts. Detta produktutvecklingsprojekt resulterade i ett instrument som underlättar för tandvårdspersonal samt ökar säkerheten för patienten vid oral protetik. Lösningen är en specialutformad pincett som träs på skruvmejseln och fixerar komponenter.
The project was initiated by dental personnel at the Specialist dentistry in Halmstad, Sweden, because they experienced problems when working with oral prosthetics. There is a risk that components are dropped and due to gravity and the patient's position, being inhaled or swallowed. This means stress and concerns, contributing to the deterioration of the psychosocial work environment for dental personnel. The Swedish dental State support was introduced in 2008, which gives the patient a reduced cost for dental prosthetic procedures. This allows more people to afford oral prosthetics. Therefore, the problem becomes more and more prevalent and the demand for a solution is requiered. The project has implemented dynamic product development with a major focus on the involvement of future users. The project was based on literature reviews, observation and survey, which was performed in the product definition phase. Different concept generation methods and evaluation methods were applied and resulted in a final prototype. A continuous dialogue and testing with the clients where performed throughout the project. This product development project resulted in an instrument that facilitates for dental personnel and increase safety for the patient during oral prosthetics. The solution is a specially designed forceps which slips onto the screwdriver and secures components.

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Navaei, Mahshid, and Omolbanin Nazari. "Endodontically Treated Teeth in General Dentistry- Identification of Factors Related to Treatment." Thesis, Umeå universitet, Institutionen för odontologi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-143973.

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ABSTRACT There are various factors that affect the success and outcome of root canal treatment. The aim of the study is to thoroughly investigate the prognosis of endodontic treated by general dental practitioners in the region of Västerbotten, Sweden, and try to identify factors that are related to an unsuccessful root canal treatment. Our hypothesis is about prognosis for teeth, which are treated by a general dentist, is worse than the teeth, which are treated by specialists, and dental students. Total 210 patients were included in our study. Of those 100 were excluded due to lack of documentation. We analysed these factors, aseptic treatment e.g. rubber dam, quality of root filling length, coronal restoration, and radiograph after 4 years. In our study, rubber dam was used only in 64 teeth (58 %) throughout whole treatment and only in 27 teeth (22 %) have seen that root filling follow the standard criteria. Twenty-two teeth (20 %) have received coronal restoration and only 21 teeth (19 %) had radiograph after 4 years, six teeth (5 %) had retreatment and 5 teeth (4 %) have been extracted. Lack of documentation was another striking finding which made it difficult for our study to extract complete information. In conclusion, we identified some factors, which can be improved.  Inadequate documentation.  Deficiencies in pre-treatment diagnostics.  Aseptic treatment e.g. rubber dam  Failure in follow-up documentation of treated teeth  Quality of root filing.
Enodontics

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Bernardes, Juliana Vieira Frezza. "Condutas de biossegurança adotadas por cirurgiões-dentistas em trabalhos protéticos." Universidade de Taubaté, 2010. http://www.bdtd.unitau.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=430.

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Introdução: Moldes, modelos e próteses são veículos de microrganismos entre o consultório odontológico e o laboratório de prótese dentária, portanto, a adoção de medidas de biossegurança por cirurgiões dentistas e técnicos de prótese dentária são essenciais para a manutenção de uma cadeia asséptica. Objetivo: Este estudo verificou o comportamento de cirurgiões dentistas durante o manuseio de moldes, modelos e trabalhos protéticos na cidade de Porto Velho, RO. Método: Foram incluídos no estudo cirurgiões dentistas inscritos no Conselho Regional de Odontologia da cidade de Porto de Velho. Um questionário contendo perguntas relacionadas às condutas de biossegurança que envolvem trabalhos protéticos foi aplicado aos participantes do estudo. A análise estatística foi conduzida adotando nível de significância estatística de 95% (p<0,05), com auxílio do software Bio Estat 5.0. Resultados: 71 cirurgiões dentistas (CD) participaram do estudo, com média de idade de 3410 anos. Todos sempre utilizavam avental, luvas e máscara durante o atendimento ao paciente, 59,15% dos profissionais afirmaram sempre realizar a desinfecção do molde após sua confecção, sendo que o alginato (88,73%) e a silicona (66,20%) foram os materiais de escolha para moldagem Quanto à desinfecção do modelo quando recebido do laboratório de prótese 43,66% afirmaram nunca realizar o procedimento, 40,75% utilizam o glutaraldeido 2% para realizar a desinfecção e 35,21% dos profissionais utilizam a imersão como método de desinfecção. Quanto ao tempo de exposição ao desinfetante, 21,13% expõem o artigo por dez minutos, 19,72% por um minuto e 19,72% por trinta minutos e 85,94% dos profissionais submetem as moldeiras ao processo de esterilização. Conclusão: A aplicação das normas de biossegurança em trabalhos protéticos, pelos profissionais da cidade de Porto Velho (RO), está aquém do esperado para que haja redução no risco de infecção cruzada.
Introduction: Patterns, models and prostheses are vehicles of microorganisms between the dental office and dental laboratory, therefore, the adoption of biosecurity measures by dentists and dental technicians are essential to maintaining an aseptic chain. Objective: This study investigated the behavior of dentists during the handling of templates, models and prosthetic works in the city of Porto Velho, RO. Method: The study included dentists enrolled in the Regional Council of Dentistry of Porto Velho. A questionnaire concerning the conduct of biosafety studies involving prosthetic was applied to study participants. Statistical analysis was conducted by adopting statistical significance level of 95% (p <0.05), using the software Bio Estat 5.0. Results: 71 dentists (CD) were enrolled, mean age 34 10 years. Everyone always used aprons, gloves and mask during patient care, 59.15% of the respondents said they always carry out disinfection of the mold after its making, and the alginate (88.73%) and silicon (66.20%) were the material of choice for casting The disinfection of the model when received from the dental lab 43.66% say they never perform the procedure, 40.75% are using 2% glutaraldehyde for disinfection and hold 35.21% of professionals use the immersion as a method of disinfection. Regarding the duration of exposure to disinfectant, the article exposes 21.13% for ten minutes, 19.72% for one minute and 19.72% for thirty minutes and 85.94% of the professionals submit the trays to the sterilization process. Conclusion: The implementation of biosafety norms in prosthetic works by professionals in the city of Porto Velho (RO), is less than expected so there is reduced risk of cross infection.

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Junior, José Quinto. "Laser de Er,Cr:YSGG em condutos radiculares preparados para cimentação de núcleos protéicos." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-05032012-103954/.

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O objetivo deste estudo é avaliar a influência da irradiação com laser de Er,Cr:YSGG no espaço protético de condutos radiculares preparados para a fixação de pinos em fibra de vidro reforçados (FRC Postec®), avaliando-se o comportamento de três diferentes técnicas adesivas (self-etching= Panavia F®; total-etching= Excite DSC® + Variolink II® e self-adhesive= RelyX Unicem Aplicap®). Observaram-se as orientações da norma ISO-TS 11405 para a preparação das raízes dentais unirradiculares humanas. As amostras foram separadas na altura da junção amelo-dentinaria, tratadas endodonticamente com instrumentação rotatória e seladas com técnica de condensação lateral. Foram utilizados dois tipos diferentes de pontas de safira para irradiação intracanal o axial (Z4, 400 m de diâmetro) e o radial ou side firing (RFT4, 415 m de diâmetro) com densidade de energia de 40 J/cm2. Esta densidade de energia foi obtida como parte deste experimento, analisando-se diversos parâmetros de energia com os resultados morfológicos e térmicos obtidos. Nesta densidade, obtive-se grande quantidade de túbulos dentinários abertos e variação de temperatura segura para uso clínico. Cada raiz foi irradiada em cinco movimentos circulares, de apical para cervical, com intervalo de 20 segundos, entre elas. Os FRC Postec foram cimentados imediatamente após a irradiação e divididos randomicamente em nove grupos (n=10). Cada raiz foi seccionada em 6 discos de 1 mm de espessura para ensaio do tipo push-out, para a obtenção da força máxima de ruptura, e posterior cálculo da resistência de união adesiva em função da área de superfície do núcleo deslocado, resultando na pressão em MPa. A resistência de união adesiva nos grupos irradiados foi estatisticamente superior do que os grupos controle. Foram avaliadas as diferenças na resistência de união adesiva em diferentes porções do núcleo (cervical, médio e apical), onde o sistema adesivo tipo self-adhesive (RelyX Unicem Aplicap) teve o melhor resultado para os grupos irradiados. Avaliou-se por técnica de FTIR as diferenças químicas ocorridas na dentina intrarradicular irradiada com laser de Er,Cr:YSGG, em diferentes porções (cervical, médio e apical) em função da orientação dos túbulos. Foram observadas nos espectros de FTIR alterações na intensidade das bandas de algumas moléculas, indicando variação na quantidade da parte orgânica (amida I e amida II) após a irradiação, nas diferentes regiões dentais em função do feixe laser sobre a orientação dos túbulos dentinários, sem causar alterações na sua composição. Essas diferenças podem interferir no resultado da resistência de união adesiva. A técnica de utilização de laser de Er,Cr: YSGG em dentina radicular pré-cimentação de núcleo protético aumenta a resistência de união adesiva, na dependência do cimento utilizado.
The aim of this study was to evaluate the influence of the Er,Cr:YSGG laser irradiation in the prosthetic post space before FRC Postec placement using three different adhesive systems (self-etching- Panavia F; total-etching- Excite DSC + Variolink II e self adhesive - RelyX Unicem Aplicap). According to ISO-TS 11405, sectioned at the CEJ, human dental single roots were endodontically treated with rotatory instruments and filled with gutta-percha points and sealer. Were used at 40 J/cm2 an axial Z4 laser tip (400 m diameter) and a radial (side firing) RFT4 laser tip (415 m diameter). This density of energy was experimentally determinated observing morphological changes in SEM images due to an increase range in the energy applied to dentinal root canal surface. At the length between 32 and 49 J/cm2 most of the intracanal dentinal tubules were open. The temperature increase was within the biological safe suggesting a feasible clinical use. Each root canal was irradiated five times with helicoidal movements from apical to cervical, with 20 seconds interval. FRC Postec were immediately cemented and randomly divided in nine groups (n=10). Each root canal was cut in six discs for push out test, were the maximum failure load was obtained and the bond strength was calculated as a function of post bonded area. The bond strength for the irradiated groups was superior among all control groups. The evaluation of bond strength among root region (cervical, middle and apical) was performed and differences were observed. The self-adhesive (RelyX Unicem Aplicap) system was noted superior among all irradiated groups and all regions. Chemical changes were analyzed by FTIR due to dental root portion and dentinal tubules orientation to laser beam direction. The FTIR spectra obtained indicated changes due to tubules orientation and root canal portion irradiated such as the proportion among the compositional ratio without causing chemical changes. These compositional ratio alterations may affect the bond strength results. The irradiation with Er,Cr:YSGG laser on dentinal walls of a prosthetic post space preparation before the post cementation, as suggested in this study, may increase the bond strength between the post and root canal dentin depending upon the luting cement that is used.

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Sarwari, Susan. "The necessity of appliances as protection in patients with prosthetic rehabilitation." Thesis, Malmö högskola, Odontologiska fakulteten (OD), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-19660.

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Syftet med denna studie är att undersöka erfarenheter och åsikter hos allmäntandläkare samt specialisttandläkare runt om i Sverige genom en omfattande enkätstudie gällande användning av bettskenor i ett skyddande syfte av protetiska konstruktioner. 2771 tandläkarna hämtades ur en kunddatabas registrerade hos dental företaget Unident.Enkäten sammanställdes på Odontologiska fakulteten, Malmö högskola med 22 frågor. Enkäterna skickades ut i digital form i ett mejl genom Unident till tandläkarna. Antalet medverkande tandläkare blev 588.Studien visade att 67 % av tandläkarna ansåg att bettskenor i skyddande syfte vid protetiska konstruktioner ej var nödvändigt. Dock valde 4 av 5 tandläkare att ändå inkludera en skyddande bettskena till patienter med utförd protetik. Dagens litteratur är väldigt snäv i detta ämne och därmed finns ett behov för framtida studier utöver enkätstudier som påvisar evidens för potentiella bettskenor som agerar skyddande på protetiska konstruktioner hos patienter.
This study aimed to investigate the experiences and habits of dentists when prescribing an appliance as protection in prosthetic therapy in patients. Since there is no published scientific evidence showing that an appliance could be used as a protection in prosthetic therapy it was out of interest to know where dentists obtain their knowledge and if they consider themselves having an adequate competence in this field. The study is based on a survey that examines general dentists as well as dental specialists through a questionnaire with 22 questions out of mixed nature. The study covered 2771 dentists from different parts of Sweden, retrieved from a database of customer records handed by Unident, a dental company. A total of 588 dentists participated in the questionnaire. The use of appliances as protection in patients with prosthetic rehabilitation was considered no to be necessary among 67% of the dentists in this study. However, every 4 out of 5 dentists sometimes include an appliance as protection whenever prosthetic therapy is indicated. Today the literature is very sparse in this subject and there is an obvious need for future studies in a different design besides questionnaires, testing the evidence for a potential protective appliance in patients with prosthetic therapy.

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Gomes, Michelle de Sá dos Santos [UNESP]. "Desenvolvimento e validação de novas tecnologias para o ensino de preparos em prótese parcial fixa." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/157318.

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O primeiro contato de alunos de graduação com a disciplina de Prótese Parcial Fixa ocorre em aulas teóricas e posteriormente em práticas laboratoriais. Na teoria os docentes utilizam de diversas formas para elucidar um preparo de Prótese Parcial Fixa, fotos e vídeos no passo a passo, guias de silicone, guias de redução, marcações coloridas e até mesmo demonstrações ao vivo. Utilizam- se desses métodos a fim de formar um conceito e fixar uma imagem de um preparo ideal obedecendo aos princípios mecânicos e biológicos das reduções estruturais em prótese fixa. O presente estudo teve como objetivo avaliar as principais dificuldades dos alunos de graduação nos preparos coronários em Prótese Parcial Fixa e sugerir ferramentas de ensino para auxiliar aluno e professor, a elucidar e calibrar os alunos nos desgastes coronários. Participaram da pesquisa ao todo 87 alunos matriculados do 3° ano integral, dos anos 2017 e 2018 da disciplina de Prótese Parcial Fixa, da graduação em Odontologia do ICT. Foi desenvolvido um aplicativo de celular com um banco de dados dos principais preparos coronários e com a possibilidade de comparação do preparo finalizado através de fotos. Também foram desenvolvidas, aplicadas e validadas 02 metodologias: Um manequim com esquema de cores que auxiliou o aluno a visualizar os preparos coronários e uma demonstração prática projetada comparou os métodos de ensino teórico e prático. 78,2% dos alunos relatam a quantidade de redução como a principal dificuldade. O método do manequim com esquema de cores foi preferência de técnica por 91,5% dos alunos. Ambos os métodos auxiliares didáticos avaliados foram aprovados pelos alunos, em 100% no método do manequim e 98,2% na vídeo aula. Respectivamente, os métodos auxiliaram na visualização da quantidade de redução e na sequência do preparo. Conclui-se que tanto o manequim com esquema de cores e a projeção ao vivo quanto o se mostraram eficazes e aprovados como recursos didáticos auxiliares no ensino de Prótese Parcial Fixa e o desenvolvimento do aplicativo de celular como ferramenta no ensino odontológico expande as possibilidades do uso de tecnologias de ensino na odontologia.
The first contact of undergraduate students with the discipline of Partial Fixed Prosthesis occurs in theory classes and later in laboratory practices. In theory, teachers use a variety of ways to elucidate a Fixed Partial Prosthesis preparation, step-by-step photos and videos, silicone guides, reduction guides, color markers and even live demonstrations. These methods are used to form a concept and to fix an image of an ideal preparation obeying the mechanical and biological principles of the structural reductions in fixed prosthesis. The present study had as objective to evaluate the main difficulties of undergraduate students in coronary arteries in Fixed Partial Prosthesis and to suggest teaching tools to help students and teachers to elucidate and calibrate students in coronary wear. A total of 87 enrolled students from the 3rd full year, from the years 2017 and 2018 of the discipline of Partial Fixed Prosthesis, from the graduation in Dentistry from the ICT participated in the research. A cellular application was developed with a database of the main coronary preparations and the possibility of comparing the finished preparation with photos. Two methodologies were also developed, applied and validated: a color design mannequin that helped the student to visualize the coronary preparations and a practical demonstration designed to compare the methods of theory and practical teaching. 78.2% of the students report the amount of reduction as the main difficulty. The method of color design mannequin was a technique preference for 91.5% of the students. Both didactic methods were approved by the students, 100% in the color design mannequin and 98.2% in the video lesson. Respectively, the methods aided in visualizing the amount of reduction and the preparation sequence. It was concluded that both the color-blind mannequin and the live projection were effective and approved as auxiliary didactic resources in the teaching of Partial Fixed Prosthesis and the development of the cellular application as a tool in dental education expands the possibilities of use of teaching technologies in dentistry.

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Giordani, Jessye Melgarejo do Amaral. "Determinantes contextuais da necessidade de prótese total em idosos : uma análise multinível." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/17427.

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Introdução: Tem sido demonstrado que fatores sociais, econômicos e do ambiente podem influenciar as condições de saúde bucal do indivíduo, principalmente para grupos vulneráveis como os idosos. O envelhecimento populacional desafia a habilidade de produzir políticas de saúde que respondam às necessidades das pessoas idosas. De acordo com o Inquérito Nacional de Saúde Bucal (SB Brasil), em 2003, cada idoso com idade entre 65 a 74 anos já havia perdido quase 26 dentes e mais da metade dessa população necessitava algum tipo de prótese. O objetivo do presente estudo foi avaliar a influência de aspectos sócio-demográficos e de serviços odontológicos contextuais na necessidade de prótese total em idosos. Metodologia: Este é um estudo epidemiológico transversal de base populacional de caráter multinível com dois níveis de análise, individual e contextual (municipal). Os dados do nível individual foram obtidos através de exames clínicos bucais (critérios da OMS) e entrevistas estruturadas conduzidos nos domicílios, a partir do banco de dados do SB Brasil e os do nível contextual a partir do Programa das Nações Unidas para o Desenvolvimento (2000) para os 250 municípios brasileiros participantes do inquérito. A população do estudo eram 5.349 indivíduos de 65 a 74 anos. O desfecho foi necessidade de prótese total em pelo menos uma das arcadas, constatada através de exame bucal em idosos desdentados, que não estavam usando prótese total no momento do exame. As exposições em nível contextual incluíam dados socioeconômicos, demográficos e de serviços odontológicos. Resultados: A prevalência de necessidade de prótese total para a faixa etária de 65 a 74 anos foi igual a 27,4%, (IC95%: 26,2-28,6). Após a análise ajustada, a chance de possuir necessidade de prótese total era menor nos residentes da Região Sul (OR 0,67; IC95%: 0,48-0,94); e maior nos municípios com menos de 3,6 anos de estudo (OR 1,57; IC95%: 1,09-2,27) quando comparados com aqueles residentes no Norte e com escolaridade maior que 6 anos. Quanto a variável de serviço odontológico, a chance de possuir necessidade de prótese total foi menor nos municípios onde havia mais de vinte mil habitantes para cada CD (OR 0,71; IC95%: 0,52-0,97) quando comparados com aqueles onde havia de 2 a 10 mil habitantes por CD. Conclusão: Aspectos contextuais apresentaram um efeito importante independentemente das variáveis individuais. Espera-se que o estudo tenha contribuído para que formuladores de políticas públicas de saúde bucal possam identificar municípios prioritários atuando com maior equidade visando a atenção integral e melhoria da qualidade de vida desta população.
Introduction: Where an individual lives and the characteristics of the social groups to which they belong may be an important determinant of its oral health, specially in elderly people. It poses challenges to health and social policy-makers due to the changing burden of chronic diseases and the marked inequalities in oral health status and access to dental care of this population. The National oral health survey (SBBrasil) showed that each people aged 65 to 74 years in 2003 had already lost 26 teeth and more than the half of this population needed some type of dental prosthesis. The objective of the present study was to assess the influence contextual variables on dentures need in older adults. Methodology: This is cross-sectional population based study in two levels: individual and contextual (town). Individual data was obtained by clinical examinations (WHO criteria) and structured interviews with 5,349 65-74- year-old individuals in 250 towns. Data sources from individual level was the SBBrasil and from contextual level was Program of United Nations for the Development. The outcome was denture need in at least one dental arch. This was assessed in edentulous elders not using dentures during the examination and interview. Contextual exposures included demographic, socioeconomic and dental care variables. Results: The prevalence of denture need was 27.4%, (CI95%: 26.2-28.6). After adjustment for individual level variables, the odds for denture need was higher in elders living in cities with low level of education and compared to those with high (OR 1.57; CI95%: 1.09-2.27) and lower in those with low per capita numbers of dental surgeons per inhabitant (OR 0.71; CI95%: 0.52-0.97). Conclusion: Regardless individual factors, contextual variables showed an independent effect on denture need in the population studied. The study may help policy makers to identify the cities in most need and reduce inequalities in dental care for this age group.

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Mascarenhas, Vinicius Ibiapina. "Análise de tensão de diferentes materiais fresados por CAD/CAM em próteses sobre implantes /." Araraquara, 2018. http://hdl.handle.net/11449/153911.

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Orientador: José Roberto Cury Saad
Resumo: Buscando o melhor entendimento sobre as forças oclusais que influenciam diretamente na longevidade dos materiais fresados em CAD/CAM, tecidos e, consequentemente, tratamentos reabilitadores, este estudo pretende avaliar a distribuição de tensão mecânica em coroas implantossuportadas e na interface osso-implante, analisando de que maneira diferentes materiais de cobertura protética (dissilicato de lítio, resina composta e composto híbrido Enamic ) se comportam em situações clínicas simuladas com implantes curtos, utilizando a análise fotoelástica com observação e análise das franjas isocromáticas. Dois implantes hexágono externo de diâmetro 5 milímetros e comprimento de 5,5 e 13 milímetros foram incluídos cada um em um bloco de resina fotoelástica de dimensões 65 x 30 x 15 mm (largura, comprimento e profundidade), instalados coroas fresadas em CAD/CAM sendo uma de compósito, outra de cerâmica dissilicato de lítio e uma terceira de um composto cerâmico híbrido. Ao conjunto foi-se submetido uma força vertical de 10 N suficiente para gerar uma resposta mecânica na coroa. Foram colhidas imagens das franjas isocromáticas observadas em frente a um polaroscópio circular com o uso de uma câmera semi-profissional e os dados foram analisados em 5 pontos diferentes ao redor do implante de acordo com a intensidade de cor gerada pelas franjas isocromáticas. Após análise estatística não se observou diferença na dissipação de força na resina fotoelástica quando comparadas as diferentes coroa... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: In order to better understand the occlusal forces that directly influence the longevity of materials machined in CAD / CAM, tissues and, consequently, rehabilitation treatments, this study intends to evaluate the mechanical stress distribution in implant-supported crowns and the bone-implant interface, analyzing (Lithium disilicate, zirconium dioxide and Enamic hybrid compound) behave in simulated clinical situations with short implants using photoelastic analysis with observation and analysis of the isochromatic fringes. Two external hexagon implants with a diameter of 5 mm and a height of 5.5 and 13 mm were each included in a block of photoelastic resin of dimensions 65 x 30 x 15 mm (width, height and depth), installed crowns in CAD / CAM being one of composite, another of disilicate lithium ceramic and a third of a hybrid ceramic compound. A vertical force of 10 N was sufficient to generate a mechanical response on the resin. Images were taken from the isochromatic fringes observed in front of a circular polaroscope with the use of a semi-professional camera and the data were analyzed in 5 different points around the implant according to the color intensity generated by the isochromatic fringes. After statistical analysis, it was not observed a difference in force distribution on photoelastic resin when compared the different crowns tested, however when the comparison was made between short and long implant, a higher and statistically significant mechanical stress intensit... (Complete abstract click electronic access below)
Doutor

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Salles, Angelo Emilio Barroso de. "Analise fotoelastica da distribuição de tensões em dois sistemas de proteses mandibulares sobre implantes : barra distal e solda a laser." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288262.

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Orientador: Mauro Antonio de Arruda Nobilo
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: Este estudo avaliou por meio de análise fotoelástica, a distribuição in vitro das tensões geradas na interface "osso/implante" em próteses mandibulares, tipo protocolo, comparando duas técnicas de confecção: Solda a laser e Barra Distal (Neodent, Curitiba - PR) onde não se utiliza infra-estrutura metálica. Foram confeccionadas duas próteses com design similares (uma para cada técnica), sobre uma matriz metálica simulando um arco mandibular edêntulo, onde foram instaladas cinco réplicas de implantes de corpo único (GT- Neodent, Curitiba - PR). A partir de um molde de silicone de duplicação (Silibor - Clássico Artigos Odontológicos Ltda.) foi confeccionado um modelo em resina fotoelástica (Araldite GY279BR - Araltec Produtos Químicos Ltda. Guarulhos - SP) com cinco implantes GT (Neodent, Curitiba - PR) incorporados. Após a instalação de cada prótese sobre o modelo fotoelástico, utilizando 10 N/cm para aperto dos parafusos, foi realizada análise fotoelástica. Em seguida, foi aplicada carga oclusal de 100 N em toda extensão de cada prótese, com auxílio de uma placa metálica posicionada sobre a face oclusal dos dentes, e então realizada nova análise das tensões. Estas análises foram executadas com o auxílio de um polariscópio circular acoplado a uma máquina fotográfica digital (H1 - Sony, Japão), que permitiu a visualização das franjas e registrou através de fotografias digitais o comportamento das mesmas ao redor dos implantes no modelo fotoelástico. De acordo com os resultados, concluiu-se que a técnica utilizando Barra Distal distribuiu melhor, e transmitiu com menos intensidade, após o aperto dos parafusos, as tensões geradas na interface "osso/implantes" do que a técnica utilizando solda a laser. No entanto, ocorreu o inverso após o carregamento oclusal.
Abstract: The aim of this study was to evaluate through photoelastic analysis, the in vitro distribution of the generated tensions in the "bone/ implant" interface in mandibular prostheses, protocol type, comparing two different working techniques: the idealized by Branemark and Distal Bar (Neodent, Curitiba - PR) where framework is not used. Two similar prostheses were made (one for each technique), on a metal matrix simulating an edentulous mandible, where five replications of single body implant were installed (GT-Neodent, Curitiba - PR). From a silicone mold for duplication (Silibor - Classico Artigos Odontológicos Ltda.), a model in photoelastic resin was created (Araldite GY279BR - Araltec Produtos Quimicos Ltda., Guarulhos - SP) with five GT implants (Neodent, Curitiba - PR) embedded. After the installation of each prosthesis on the photoelastic model, using 10 N/cm for tightening the screws, a photoelastic analysis was performed. Then a 100 N occlusion load was applied throughout each prosthesis extension with the help of a metal plate positioned on the occlusal face of the teeth, and then a new analysis of the tensions was conducted. These analyses were performed with the help of a circular polariscope attached to a digital camera (H1 - Sony, Japan), which allowed the visualization of the fringes and recorded by digital photos the behaviour of the implants. According to the results, it was concluded that the Distal Bar technique distributed better, and transmitted with less intensity, after the tightening of the screws, the generated tensions to the system "bone/implants" than the laser welding. However, it happened the opposite after the occlusal load.
Mestrado
Protese Dental
Mestre em Clínica Odontológica

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23

Bergamo, Edmara Tatiely Pedroso 1985. "Fracture load and phase transformation in monolithic zirconia crowns submitted to hydrothermal or mechanical treatments = Carga à fratura e transformação de fase em coroas monolíticas de zircônia submetidas a envelhecimento hidrotérmico ou mecânico." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290235.

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Abstract:

Orientadores: Wander José da Silva, Altair Antoninha Del Bel Cury
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: Os sistemas cerâmicos representam na odontologia uma alternativa aos metais na reabilitação protética, sendo que a zircônia é o material com melhores propriedades mecânicas. Coroas confeccionadas em zircônia sem aplicação de cerâmica de cobertura, chamadas monolíticas, têm se mostrado uma alternativa favorável para reabilitação oral, pois associam alta resistência à fratura e estética satisfatória, assim como evitam a complicação mais evidente em infraestruturas de zircônia que é a fratura da cerâmica de cobertura. A zircônia pura pode assumir 3 formas cristalográficas: monoclínica, tetragonal e cúbica, dependendo da temperatura. A união da zircônia com óxidos estabilizadores, como o óxido de ítrio (Y-TZP) faz com que a zircônia se mantenha na fase tetragonal. No entanto, a zircônia permanece metaestável e mediante relativamente baixas temperaturas, umidade e estresse uma progressiva transformação de fase de tetragonal para monoclínica pode ocorrer e afetar a resistência da mesma. Assim sendo, o presente estudo avaliou a carga à fratura e a transformação de fases da zircônia em coroas monolíticas submetidas ao envelhecimento através de testes térmicos e mecânicos. Setenta coroas monolíticas de zircônia (Y-TZP) foram cimentadas em réplicas de resina composta e separadas aleatoriamente em 5 grupos (n=14): Controle (C), sem tratamento; Envelhecimento hidrotérmico (EH), 122°C, 2 bar de pressão por 1 hora; Fadiga térmica (FT), 104 ciclos, de 5 a 55°C por 30 segundos; Fadiga Mecânica (FM), 106 ciclos, 70 N de carga, deslizamento de 1,5 mm da cúspide mesiopalatina com frequência de 1,4 Hz; e Fadiga Mecânica associada com tratamento térmico (FMT). Ao final de cada tratamento, a carga à fratura foi determinada em máquina de testes universal com célula de carga de 10KN e velocidade de 1mm/min (n=12/grupo). Avaliação de alterações de superfície e o modo e a origem da fratura foram realizadas no microscópio eletrônico de varredura. A transformação de fases foi analisada através da difração de raios X (n=2/grupo). Os dados de resistência à compressão foram analisados por Análise de variância a um fator e o nível de significância foi de 5%. Também foi realizada a distribuição de Weibull. Todas as restaurações sobreviveram aos testes de envelhecimento e não foram observadas diferenças significantes entre os tratamentos para a carga à fratura (p>0,05). O módulo de Weibull variou de 6,2 a 16,6, com diferença significativa para o grupo envelhecido pelo tratamento hidrotérmico. Falhas catastróficas com origem na superfície foram evidenciadas. Na análise da difração de raios X foi observado que houve transformação de fases, para todos os grupos, nas diferentes faces da coroa, variando entre 1,9 a 8,9%. Com base nos dados concluí-se que coroas monolíticas de zircônia evidenciam uma alta carga à fratura, confiabilidade estrutural e apresentaram baixa transformação de fase
Abstract: Nowadays, in dentistry, zirconia ceramic systems represent an alternative to metals in prosthetic treatment due to the excellent mechanical properties. Zirconia crowns made without porcelain veneering, called monolithic, have proven to be a favorable alternative to oral rehabilitation, as they associate high strength and satisfactory aesthetic, while avoiding the most known complications in zirconia prosthesis, chipping and delamination. Pure zirconia can assume three crystallographic forms: monoclinic, tetragonal and cubic depending on the temperature. The zirconia association with stabilizing oxides, such as yttrium oxide (Y-TZP), maintains the zirconia in the tetragonal phase at room temperature. Therefore, zirconia remains metastable and at low temperatures, with moisture and stress a progressive transformation of tetragonal to monoclinic phase can occur and affect its strength. The present study evaluated the fracture load and phase transformation of zirconia monolithic crowns submitted to thermal and mechanical aging tests. Seventy monolithic zirconia crowns (Y-TZP) were cemented in resin-based replica and randomly divided into 5 groups (n = 14): Control (C), no treatment; Hydrothermal aging (HA), 122°C, 2 bar for 1 hour; Thermal Fatigue (TF), 104 cycles between 5 and 55°C for 30 seconds; Mechanical Fatigue (FM) 106 cycles, with a load of 70 N sliding of 1.5 mm in mesiopalatal cusp at 1.4 Hz; Mechanical and Thermal Fatigue associated (MTF). After each treatment, the fracture load was determined in a universal testing machine with 10KN load and speed of 1mm/min (n=12/group). Surface modifications and fracture origin and mode were evaluated by scanning electron microscope. The phase transformation was analyzed by x-ray diffraction (n=2/group). The fracture load data were analyzed by one-way ANOVA at a level of 5%. Also, the Weibull distribution was performed. All restorations survived the aging tests and no significant differences were observed in between treatments (p> 0.05). There was no statistically significant difference in the mean fracture load and characteristic fracture load among the groups (p>.05). The Weibull modulus ranged from 6.2 to 16.6, with significant difference between control and hydrothermal aging groups. Catastrophic failures were observed. Phase transformation was shown at the different surfaces of the crown in all groups (1.8-8.9%). In conclusion, monolithic zirconia crowns showed high fracture load, structural reliability and low phase transformation
Mestrado
Protese Dental
Mestra em Clínica Odontológica

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Rathi, Nakul H. "Comparing the Accuracy of Intra-Oral Scanners for Implant Level Impressions Using Different Scanable Abutments." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1407200647.

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Tolentino, Pedro Henrique Moreira Paulo. "Fatores que influenciam na tomada de decisão para a indicação de exodontias e do tipo de tratamento reabilitador em casos de edentulismo parcial com dentes periodontalmente afetados." Universidade Federal de Goiás, 2018. http://repositorio.bc.ufg.br/tede/handle/tede/8229.

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The objective of this study was to evaluate if periodontal training and the time and place of formation and the training of professionals in Bioethics and Forensic Dentistry would influence the decision making in relation to indicating the exodontia of periodontally affected teeth and the type of rehabilitation suggested in patients with partial edentulism, identifying the clinical and social criteria that would directly interfere with this choice. For this purpose, a questionnaire was applied to general dental surgeons and periodontal specialists, with questions regarding age, time and training institution, and decision making for four (4) clinical cases illustrated as to the factors of interest for the study. 423 questionnaires were distributed, with a rate of return of 35,46%. Of these, 31.3% were periodontists and 68.7% were general clinical. 82% had less than 15 years of training and 18% had more than 15 years. Regarding the clinical decision for case #1, 42% did not indicate any extraction for the upper arch and 56% had the same decision for the inferior arch. A statistically significant difference was observed between periodontists and general practitioners (p<0.05). In case #2, 57.3% and 92.7% of the participants indicated exodontia of up to 3 teeth for the upper and lower arches, respectively. A statistically significant difference (p<0.05) was observed in relation to the indication for the remnants as a function of the participants' training time. Regarding case #3, only 1 participant, who was periodontist, indicated extraction for 2 teeth from the upper arch. For the lower arch, 48% indicated extraction of up to 3 teeth, and statistically significant differences were observed in relation to the formation time and the number of teeth indicated for extraction (p<0.05). In case #4, 83.3% of the participants indicated exodontia of all remnants. Regarding the type of rehabilitation, the removable partial denture was the most appropriate option for cases #1 and #2 for both arches, with a statistically significant difference between specialists and non-specialists for case #2, the periodontists indicated more frequently prostheses implant-supported (p<0.05). For the lower arch of case #3, rehabilitation with implant-supported prosthesis was the most chosen option (75.3%), with a statistically significant difference between specialists and general practitioners (p<0.05). In case #4, the participants indicated more muco-supported total prosthesis, for upper (89.3%) and lower arch (63.3%), without significant statistical differences (p>0.05). Regarding the clinical and social criteria that guided decision making, the most frequent reason to justify the indication of extraction in all cases was the severity of patients periodontal disease. The results showed that clinical decision making in relation to the proposed cases was influenced by the specialty and the training time of the participants. In general, periodontists and professionals with shorter training periods recommended fewer extractions, and there was a greater tendency among specialists to indicate implant-supported prostheses. The severity of periodontal disease was a more relevant criterion than social issues and the patient's willingness to decide to indicate exodontia.
O objetivo desse trabalho foi avaliar se a formação em Periodontia, o tempo e local de formação e a formação dos profissionais em Bioética e Odontologia Legal influenciariam na tomada de decisão em relação à indicar a exodontia de dentes periodontalmente afetados e ao tipo de reabilitação sugerida em casos de pacientes que apresentam edentulismo parcial, identificando os critérios clínicos e sociais que interfeririam diretamente nesta escolha. Para isso, foi aplicado um questionário a Cirurgiões-dentistas clínicos gerais e a especialistas em Periodontia, com questões referentes à idade, tempo e instituição de formação, e tomada de decisão para 04 (quatro) casos clínicos ilustrados quanto aos fatores de interesse para o estudo. Foram distribuídos 423 questionários, com uma taxa de retorno de 35,46%. Destes, 31,3% eram periodontistas e 68,7% clínicos gerais. 82% tinham menos de 15 anos de formação e 18% mais de 15. Em relação a decisão clínica para o caso 1, 42% não indicaram nenhuma extração para o arco superior e 56% tiveram a mesma decisão para o inferior. Foi observada uma diferença estatisticamente significante entre os periodontistas e os clínicos gerais (p<0,05). No caso 2, 57,3% e 92,7% dos participantes indicaram exodontia de até 3 dentes para os arcos superior e inferior respectivamente. Foi observada uma diferença estatisticamente significante (p<0,05) em relação a indicação para os remanescentes em função do tempo de formação dos participantes. Em relação ao caso 3, apenas 1 participante, que era periodontista indicou exodontia para 2 dentes do arco superior. Já para o arco inferior, 48% indicaram extração de até 3 dentes, sendo observada diferenças estatísticas relevantes em relação ao tempo de formação e a quantidade de dentes indicados para extração (p<0,05). No caso 4, 83,3% dos participantes indicaram exodontia de todos os remanescentes. Quanto ao tipo de reabilitação, a prótese parcial removível foi a opção mais indicada para os casos 1 e 2 para ambos os arcos, havendo uma diferença estatisticamente significante entre especialistas e não especialistas para o caso 2, sendo que os periodontistas indicaram com maior frequência próteses implanto-suportadas (p<0,05). Para o arco inferior do caso 3, a reabilitação com prótese implanto-suportada foi a opção mais escolhida (75,3%), havendo uma diferença estatisticamente significante entre os especialistas e os clínicos gerais (p<0,05). No caso 4, os participantes indicaram mais a prótese total muco-suportada, tanto para o arco superior (89,3%), como para o inferior (63,3%), sem diferenças estatísticas significantes (p>0,05). Com relação aos critérios clínicos e sociais que nortearam à tomada de decisão, o motivo mais alegado para justificar a indicação de extração em todos os casos, foi a gravidade da doença periodontal dos pacientes. Os resultados demonstraram que a tomada de decisão clínica frente aos casos propostos, sofreu influência da especialidade e do tempo de formação dos participantes. De um modo geral, os periodontistas e profissionais com menor tempo de formação recomendaram menos exodontias, e houve uma tendência maior por parte dos especialistas em indicar próteses implanto-suportadas. A gravidade da doença periodontal foi um critério mais relevante do que questões sociais e vontade do paciente para a decisão de indicar exodontias.

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MESKO, Mauro Elias. "Qualidade de vida relacionada à saúde bucal de usuários de prótese total e prótese parcial removível." Universidade Federal de Pelotas, 2012. http://repositorio.ufpel.edu.br/handle/ri/2234.

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Longevity increase is not directly related to quality of life. In Dentistry, it became in evidence by the fact that almost twenty-five percent of the population between 65 and 74 year-old presents a completely edentulous arch. As the elderly have a higher probability of being affected by chronic oral problems they tend to demand complex treatments. The aim of this survey was to: (i) evaluate the relationship between the Oral Health Impact Profile (OHIP-EDENT) and Geriatric Oral Health Assessment Index (GOHAI) questionnaires to assess the oral health quality of life in denture wearers, (ii) evaluate the associated factors to impairment in the oral health quality of life in elderly wearing removable dentures using the OHIP- EDENT and GOHAI. Evaluation of the oral health quality of life in complete denture and removable partial denture wearers was performed according to the World Health Organization criteria. The survey consisted of applying GOHAI and OHIP-EDENT questionnaires and a clinical examination. Questions about socioeconomic conditions were applied aiming to determine which factors have an influence in oral health related quality of life. The hypotheses tested were (1) different questionnaires would provide similar results when assessing oral health quality of life in totally or partially edentulous patients wearing prosthesis; (2) age, socioeconomic profile, type and location of the prosthesis and their stability and retention would not be associated to the oral health quality of life. The results showed that the questionnaires are different tools when both the total and adjusted values were compared. The exception was for Kennedy Class I and II removable partial dentures wearers. Mandibular complete dentures caused a higher impact in individuals quality of life, except for the removable partial denture wearers. For the patients aged 60 years old or more the questionnaires showed themselves quite different. Among the subscales, the only statistically difference was found in functional limitation and the domains food catching was the one that showed difference in the removable partial denture wearers group. Using the same questionnaires the variables age, familiar income, type of prosthesis, stability and retention of the prosthesis were evaluated. Factors associated to the 14 impact in OHRQoL were familiar income, stability and retention of the prostheses. Therefore, OHIP-EDENT and GOHAI are different tools, especially when used with individuals older than 60 years old, poor denture quality was associated to the impact in quality of life while income had influence on the results
O aumento da longevidade nem sempre está associado diretamente a uma melhora na qualidade de vida. Na Odontologia isso é evidente uma vez que quase um quarto da população entre 65 e 74 anos tem um de seus maxilares totalmente desdentados, conforme o levantamento de Saúde Bucal de 2010. Os pacientes idosos têm uma maior probabilidade de apresentarem problemas bucais crônicos e potencial demanda de tratamentos complexos. Os objetivos deste estudo foram (i) avaliar se existe correlação entre os questionários Oral Health Impact Profile for Edentulous (OHIP-EDENT) e Geriatric Oral Health Assessment Index (GOHAI) para medir qualidade de vida relacionada à saúde bucal em uma população de usuários de próteses removíveis; (ii) avaliar os fatores associados a incapacidades na qualidade de vida relacionada a saúde bucal em uma população de usuários de próteses removíveis utilizando o OHIP-EDENT e o GOHAI. Pacientes usuários de próteses removíveis atendidos nas Clínicas da Faculdade de Odontologia da UFPel foram avaliados seguindo os critérios da Organização Mundial de Saúde onde foi realizado exame intrabucal. Foram aplicados os questionários GOHAI e OHIP-EDENT, além de questões sobre condições demográficas e socioeconômicas, visando determinar se algum fator influenciaria na qualidade de vida destes indivíduos. As hipóteses testadas foram as de que: (1) os questionários apontariam resultados semelhantes na mensuração da qualidade de vida relacionada à saúde bucal em pacientes usuários de próteses removíveis; (2) os fatores idade, condição socioeconômica, tipo de prótese e localização da prótese, bem como sua retenção e estabilidade não estariam associados a incapacidades na qualidade de vida relacionada à saúde bucal. Os resultados mostraram que o OHIP-EDENT e o GOHAI são ferramentas diferentes tanto quando se comparam os resultados brutos quanto os ajustados, exceto para as próteses parciais removíveis Classes I e II de Kennedy. As próteses totais mandibulares se mostraram causadoras de maior impacto sobre a qualidade de vida dos indivíduos, porém isto não ocorreu com as 12 parciais removíveis. Para o grupo de pacientes acima dos 60 anos o OHIP-EDENT e o GOHAI mostraram resultados bastante diferentes, parecendo ser o OHIP-EDENT mais sensível. Dentre as subescalas dos dois questionários, a única que mostrou diferença estatística foi a limitação funcional, sendo o domínio que mostrou diferença a retenção alimentar nos grupos de próteses parciais removíveis. Utilizando os mesmos questionários, quando se avaliaram as variáveis idade, renda familiar, tipo de prótese e retenção e estabilidade das próteses, os fatores associados ao impacto na qualidade de vida foram: renda familiar, estabilidade e retenção. Conclui-se que o OHIP-EDENT e o GOHAI são ferramentas diferentes, principalmente para uso em pacientes acima dos 60 anos e que a qualidade da prótese está associada ao impacto na qualidade de vida, além do fator renda ter influência sobre os resultados

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Wasterlain, Rosa Sofia da Conceição Neto. "'Males' da boca : estudo da patologia oral numa amostra das colecções osteológicas identificadas do Museu Antropológico da Universidade de Coimbra : finais do séc. XIX inícios do séc. XX." Doctoral thesis, 2006. http://hdl.handle.net/10316/1580.

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Tese de doutoramento em Antropologia apresentada à Fac. de Ciências e Tecnologia de Coimbra
A saúde dentária de uma amostra populacional portuguesa dos finais do século XIX e inícios do século XX, pertencente às colecções osteológicas identificadas do Museu Antropológico da Universidade de Coimbra, foi investigada através da análise da cárie dentária, doença periodontal, inflamação periapical e perda de dentes ante mortem. O desgaste dentário foi igualmente estudado, não só por ser uma condição relacionada com a dieta mas também por poder afectar a prevalência de várias doenças orais. Os objectivos do presente estudo consistiram em registar o padrão e distribuição das referidas patologias, fornecendo uma série de referência para estudos comparativos futuros, interpretar os resultados em termos das condições biológicas, socioeconómicas e comportamentais prevalecentes naquela altura e investigar a epidemiologia das doenças orais na sua forma original. Os indivíduos caracterizavam-se por um desgaste oclusal e um atrito interproximal relativamente ligeiros e uma frequência de cáries e de perda dentária ante mortem extremamente elevadas. A periodontite destrutiva ocorria relativamente cedo e aumentava consideravelmente com a idade. No que respeita à inflamação periapical, a maioria dos sujeitos registava unicamente granulomas ou quistos, que se sabe corresponderem a lesões relativamente benignas e assintomáticas. Este estudo mostrou que as patologias orais eram muito comuns e provavelmente tiveram um efeito significativo no bem-estar e na qualidade de vida dos indivíduos que viveram no centro de Portugal no início do século XX. A frequência e o padrão das doenças orais foram interpretados como resultando de uma dieta macia, rica em milho, associada a uma higiene oral pobre e um acesso limitado a cuidados dentários profissionais. Este estudo também ilustrou a natureza cumulativa das doenças orais pesquisadas e os efeitos confundíveis da perda dentária ante mortem. Dados os conhecimentos históricos bem documentados acerca da população examinada, esta investigação constituiu um excelente teste à eficiência informativa das lesões dento-alveolares, que se revelaram poderosos indicadores das condições de vida. Em suma, permitiu concluir que a análise de restos esqueléticos humanos pode fornecer uma visão acerca da frequência, progressão e patogénese das doenças orais numa população. Palavras-chave: dentes humanos, colecções osteológicas identificadas, epidemiologia, história da medicina dentária, restaurações, tratamentos protésicos, dieta, higiene oral.
The present study reports on dental caries, periodontal disease, periapical inflammation and ante-mortem tooth loss in a Portuguese skeletal sample belonging to the identified osteological collections of the Museum of Anthropology of University of Coimbra (late nineteenth/early twentieth centuries). Dental wear was also investigated, not only for its relationship with diet but also because it affects the prevalence of other oral conditions. The purpose was to record the pattern and distribution of oral diseases and thereby establish a baseline for quantitative comparisons with similar investigations, to interpret the results in terms of the biological, socioeconomic and behavioural conditions prevailing at that time and, finally, to investigate the epidemiology of oral diseases in the absence of dental treatment. This sample was characterized by relatively slight occlusal and approximal attrition levels and extremely high frequencies of dental caries and ante mortem tooth loss. Destructive periodontitis was observed early in adulthood, rising steadily with age. With respect to periapical inflammation, most bony cavities were probably periapical granulomas or apical periodontal cysts, which are usually benign and asymptomatic. In conclusion, in the centre of Portugal at the beginning of the twentieth century, oral pathologies were very common and probably had a large effect on the well-being and general quality of life. The frequency and pattern of oral diseases are interpreted to be the result of a soft diet, rich in maize, coupled with a deficient oral hygiene and a limited access to professional dental care. This study illustrated the age-cumulative nature of many dental disease and the confounding effects of ante-mortem tooth loss. Given the well-documented historical background of the population examined, this study constitutes a good test of the informative efficiency of the dental lesions, which appear to be powerful and high-resolution indicators of life conditions. On the other hand, this study gave the opportunity to investigate the epidemiology of oral diseases in their original form, and thus contribute for the better understanding of the development and progression of oral pathologies.

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TOBOLKOVÁ, Andrea. "Deskripce zubní úrazovosti u chlapců staršího školního věku v mikroregionu České Budějovice a návrh zdravotně edukačního materiálu." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-152909.

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Thesis deals with the problem of the older school age boys dental injuries in České Budějovice region. The injury means: ?sudden damage of the health by effect of external factors which exceed adaptation options of the human body?. In the sphere of dental injuries the children is the most jeopardized group of population. The most often reason for the children injuries is their imperfect stability. In case of older children and young people there are injuries mostly caused by sport. Teoretical part of my thesis is focused on definition of older school age as well as on anatomy and teeth physiology. The part of thesis also is the enumeration of dental injuries and its treatment. I also mention prosthetic dentistry and the influence of accidents on individual physical and mental health. At the end of teoretical part there is mentioned process of the injured examination, posttraumatic dental hygiene and patient nutrition after teeth accident. Research part finds with the help of questionnaire survey the kinds of dental accidents, circumstances of injuries formation and the influence of accidents on individual physical and mental health in specific age category. The questionnaire survey was evaluated and processed in grafical part of thesis. The part of thesis also is health and educational material which helps to rise the quality of dental hygiene and also contributes to the prevention of dental accidents formation of second degree students at primary schools.

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Cabral, Sílvia Egipto. "Relatório atividade clínica." Master's thesis, 2015. http://hdl.handle.net/10400.14/18803.

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O presente documento, Relatório de Atividade Clínica, trata de toda a actividade realizada por mim, na Clínica Universitária no presente ano lectivo 2014/15. Este trabalho é realizado com o intuito de relatar todas as atividades clínicas, tendo como objetivo resumir todo o percurso deste ano lectivo, podendo, quando terminado, ter um conjunto de informação com interesse académico e pessoal, de evolução e integração de conhecimentos. Juntamente a isto pretende-se também estudar a população que se apresenta à consulta da Clínica Universitária, avaliando o Índice de CPO, dentes perdidos, reabilitações protéticas e doença periodontal. Assim sendo, este relatório elabora um plano de trabalho, seguindo uma linha de pensamento, de forma a apresentar possíveis conclusões com sentido e lógica. O tema a ser abordado é o envelhecimento e degradação da saúde oral da população, sendo este um assunto, na minha opinião, com interesse para a Medicina Dentária, tendo repercussões directas na nossa prática clinica diária. Acompanhado com um relato, quantitativo e qualitativo, do cumprimento do programa proposto pelas diferentes áreas disciplinares. O Médico Dentista tem de estar preparado para o aumento da população idosa e das suas necessidades e espectativas em relação ao tratamento dentário. É essencial investir na prevenção e gestão da doença, ao invés de apenas tratar o paciente.
This document, Clinical Activity Report, deals with all the activity carried out by me, at the University Clinic during the present school year, 2014/15. This work is elaborated in order to report all academic activities, both clinical and research work. Aiming to summarize all the work from this present year, may, when completed, have a set of information with academic and personal interest, showing development and integration of knowledge. Along to this there will be a study about the population that is presented to the consultation in University Clinic, assessing the DMF Index, lost teeth, prosthetic rehabilitation and periodontal disease. Therefore, this report shall prepare a work plan, following a line of thought, in order to present possible conclusions with sense and logic. The issue to be addressed is the aging of population and degradation of oral health, which is a subject that in my opinion, is relevant to dentistry since it has direct implications on our daily clinical practice. Attached there will be a report, quantitatively and qualitatively, that will resume the fulfilment of the proposed program by the different disciplines. The Dentist must be prepared for the increasing of elderly population which has needs and expectations in relation to dental treatment. It is essential to invest in prevention and management of disease, rather than just treating the patient.

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Albar, Nasreen Hassan. "The significance of embrasure design on the fracture load of fixed denture prosthesis: an in vitro study." Thesis, 2018. https://hdl.handle.net/2144/33269.

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OBJECTIVE: This study evaluated two embrasure designs by measuring their differential effect on load at failure of provisional fixed partial dentures (FPDs) fabricated of five commercially available polymer-based restorative materials. METHODS: Five provisional C&B materials were selected to fabricate FPDs with two different embrasure designs: sharp vs. rounded embrasures (n=12 for each material). The test materials included: Telio CAD (Ivoclar-Vivadent), Coldpac (Motloid), Protemp Plus (3M), VersaTemp (Sultan), and Turbo Temp (Danville). The embrasures were formed using prefabricated cutters with measured Radii (0.002r and 0.03r) and a fixture to hold each provisional FPD in place for the uniform standardized cuts. Molds for the CAD/CAM provisional FPDs were used to fabricate the syringeable temporary materials and form bridges with the same geometric design. All provisional bridges were cemented using Temp-Bond (Kerr) to the corresponding standardized abutments and tested to failure in a universal Instron testing machine by loading each specimen compressively in the mid pontic region. The load at break was recorded in Newton. A one-way analysis of variance (ANOVA) was used to compare the difference in each group’s mean. RESULTS: A significant difference in fracture load was found between the two groups of designs, in which the round embrasure was significantly stronger than was the sharp. A significant difference also was found between the type of temporary material used to fabricate the bridge in the two groups, and except for Coldpac, no significant difference between the embrasure anatomies was found. Fatigue loading did not appear to influence the two bridges’ fracture load, but it did show a significant difference with respect to the modulus of elasticity, in that the bridges that underwent fatigue loading showed a higher elastic modulus by comparison to the control group. Another variable that influenced the modulus of elasticity was the type of temporary material used to fabricate the bridge, in which TelioCAD was found to be the stiffest. However, the embrasure design did not seem to affect the bridges’ rigidity. CONCLUSION: A significant difference was found in fracture strength between the rounded and sharp embrasure design. Except for Coldpac, the rounded embrasure showed higher fracture toughness than did the sharp. No significant correlation was found between the two embrasure designs and the modulus of elasticity. Interestingly, the fatigued bridges that underwent cyclic loading showed a higher modulus of elasticity. The sharp embrasure design showed no fracture in the pontic region, while the rounded design did in 5.47% of the sample. This may be explained by the photoelastic bridges, in which the stress diffuses in the rounded design to include the pontic region, while in the sharp design, the stress is concentrated on the connector area. Stress analysis, both by means of photoelastic and finite element analysis, demonstrated that the bridge with the sharp embrasure design’s stress was high in the connector area compared to the round embrasure design.

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Falcao, Felipe A. "Torque required to loosen surface treated abutment screws before and after cyclic loading a thesis submitted in partial fulfillment ... for the degree of Master of Science in Restorative Dentistry ... /." 2001. http://catalog.hathitrust.org/api/volumes/oclc/68962370.html.

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Otsubo, Yuko. "Effect of surface treatment and fatigue on retention strength of titanium abutment to zirconia." Thesis, 2017. https://hdl.handle.net/2144/26341.

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The objective of this study was to compare effect of surface treatment and fatigue to the retention of zirconia crowns luted to two different heights of titanium abutments. Thirty titanium base 3.5 mm (n = 15) and 5.5 mm in height (n = 15) and thirty zirconia crowns were used. Group A (n = 10), 3.5-mm-height titanium base with no surface treatment; Group B (n = 5), 3.5-mm-height titanium base with surface treatment; Group C (n = 5), 3.5-mm-height titanium base with no surface treatment with fatigue test; Group D (n = 5), 3.5-mm-height titanium base with surface treatment and fatigue test. The identical group allocation was utilized to 5.5-mm-height titanium base groups, Group E, F, G and H respectively. All zirconia crowns and titanium abutments of the groups with surface treatment were particle abraded with 50 μm alumina. All specimens were subjected to a pull-out test. Data were analyzed with ANOVA and the Tukey HSD test. Pull-out retention forces for each group were: Group A: 288 ± 97.5 N, Group B: 198.71 ± 82.94 N, Group C: 537.61 ± 80.13 N, Group D: 600.11 ± 27.23 N, Group E: 240.68 ± 54.33 N, Group F: 270.92 ± 16.43 N, Group G: 707.03 ± 32.30 N, and Group H: 831.19 ± 55.50 N. Particle abrasion of the titanium base significantly increased zirconia crown retention. The height of the titanium base had a significant influence on retention force in particle-abraded groups. The fatigue test did not decrease retention force.
2018-09-26T00:00:00Z

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Abdallah, Ali J. "Machinability of high-strength dental polymers and their performance as framework materials for all-on-four prostheses." Thesis, 2021. https://hdl.handle.net/2144/42951.

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OBJECTIVES: To assess the viability of using high-strength polymers as framework materials for full arch implant-supported fixed prostheses, veneered with full-coverage restorations of different materials. The machinability, mechanical performance, and damping capacity of the polymer-based materials was of interest. METHODS: The two framework polymers – a polyetheretherketone (JUVORA™ Dental Disk, Juvora) (PEEK) and a fiber-reinforced composite (TRINIA™ CAD/CAM Disk, Trinia) (TR) – were characterized with Fourier-Transform Infrared (FTIR) Spectroscopy and energy-dispersive X-ray spectroscopy (EDS). Phase 1 consisted of a machinability study involving the merlon fracture test, which tested the milling success of PEEK and TR at 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, and 0.5 mm. 10 four-walled merlons of each thickness and material were milled out of CAD/CAM Disks (n = 100 merlons, n = 400 walls) using a 5-axis milling machine, inLab MC X5 (Dentsply Sirona, Germany). Milling success rate, fracture height, fracture length, fracture position, fracture direction, and chipping factor were assessed. In phase 2, 20 bars of dimensions 3.3 mm x 10 mm x 40 mm were milled from each of the two framework materials, PEEK and TR, and two veneer materials – a composite resin material (Shofu Disk HC, Shofu, Inc., Kyoto, Japan) (COM), and a high-translucency 3 mol% yttria-stabilized tetragonal zirconia polycrystal material (Cercon® ht, Dentsply Sirona, Bensheim, Germany) (ZR). Framework and veneer bars were bonded to each other in 4 framework/veneer combinations of 10 bilayers each: PEEK/COM (PCB), PEEK/ZR (PZB), TR/COM (TCB), and TR/ZR (TZB). Bilayer bars were loaded to failure in a 3-point bending test. Failure load, biaxial flexural strength, failure pattern and failure mode were documented. In Phase 3, 10 full arch fixed implant-supported frameworks were designed and fabricated in TR material over an epoxy resin model containing 4 implants in the second premolar and lateral incisor positions. 5 frameworks were veneered by COM in the canine to first molar region, while the other 5 were veneered by ZR. Four loading sites were designated per prosthesis in the occlusal surface of the first molars and the first premolars. Prostheses were loaded at the four occlusal sites in 5 cycles of loading and unloading. The damping capacity of the prostheses was calculated based on energy absorbed during loading and unloading. Displacement and permanent deformation values of the prosthesis structures were obtained from the load-displacement data. Prostheses were loaded to failure at the same sites, and failure load and failure mode were observed. RESULTS: The minimum machined thickness of PEEK and TR was 0.5 mm. There was no significant difference between milling success of PEEK and TR, but cumulative success rate was slightly superior in PEEK. PEEK exhibited a ductile response to machining damage, while TR showed a more brittle response. Chipping factor of PEEK was higher than TR eightfold, meaning TR showed an improved marginal integrity at 0.5 mm. Both materials showed concerning signs of machining damage with the milling parameters and tools used in this study. Bilayer bars with a TR framework withstood significantly higher loads at failure compared to bilayers with a PEEK framework. Bilayer bars with a ZR veneer withstood significantly higher loads at failure compared to bilayers with a COM veneer. The biaxial flexural strength of the four framework/veneer combinations could not be compared due to the occurrence of delamination in 3 of the 4 groups. The PZB group was the only group with fracture of both the veneer and framework without any delamination and exhibited a mean biaxial flexural strength of 46.15 ± 5.76 MPa. None of the bilayer bars with a TR framework exhibited framework fracture. In delaminated specimens, bilayer bars with a TR framework exhibited mixed adhesive-cohesive failure on both layers, while bilayer bars with a PEEK framework exhibited purely adhesive failure on the PEEK-cement interface. Full arch implant prostheses with a TR framework demonstrated elastic hysteresis in continuous cycles of cyclic loading, which is evidence of viscoelastic damping. Significantly higher energy absorption was observed in prostheses veneered with COM compared to ZR. Energy absorption decreased with increasing cycles of loading-unloading. Significantly higher maximum displacement was observed in prostheses veneered with COM compared to ZR, and in cantilever support compared to bounded support. Maximum displacement was inversely related to the thickness of the veneer and framework materials. Permanent deformation of the prosthesis was negligible after 10 cycles. The failure pattern of all prostheses presented as fracture in the veneer only and partial delamination of the veneer with mixed adhesive-cohesive failure mode. The mean failure load at ZR-veneered bounded sites was significantly higher than that of COM-veneered bounded sites. The mean failure load at bounded loading sites was significantly higher than that of cantilever loading sites. ZR-veneered prostheses demonstrated failure load values above 1000 N at all sites. CONCLUSION: The merlon fracture test is well-complemented by several quantitative and qualitative measures to assess the machinability of materials. Optimized tools and parameters for milling PEEK and TR should be investigated. Full arch implant prostheses with TR framework and ZR veneer are a viable option for fixed implant rehabilitation demonstrating damping capacity, adequate failure load values, and easy repairability.

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Varelas, Carolina Duarte Ferreira Atanásio. "Relatório de atividade clínica." Master's thesis, 2018. http://hdl.handle.net/10400.14/26144.

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O presente relatório de atividade clínica trata-se de um estudo refletivo por parte da autora do trabalho efetuado durante o seu tempo de atividade clínica (Abril 2016 e Junho 2018) na Clínica Dentária Universitária da UCP (Instituto de Ciências da Saúde, Viseu). Permite assim a introspeção acerca dos conhecimentos adquiridos, de forma a criar uma base sólida de referências para trabalho futuro. Foi assim efetuado uma análise estatística descritiva da amostra de pacientes cujo tratamento foi efetuado pelo binómio da autora. Esta análise foi realizada inicialmente de forma geral, caraterizando em relação ao tipo de trabalho (distribuição por área disciplinar e segundo a ação da autora como operador/assistente) ou segundo as caraterísticas individuais (género, antecedentes clínicos, hábitos de risco). De seguida foi executada a análise especifica para cada área disciplinar. Nomeadamente para as áreas de: Medicina Oral, Dentisteria Operatória, Periodontologia, Odontopediatria, Endodontia, Cirurgia Oral, Prótese Removível, Prótese Fixa, Oclusão e Ortodontia. Foram estudadas as especificações da amostra de cada uma, em relação aos diagnósticos determinados, tipo de tratamento efetuado e nível de colaboração. O trabalho efetuado ao longo dos cinco anos de formação e consequentes conhecimentos adquiridos tornam-se determinantes para desenvolver as capacidades autónomas do futuro Médico Dentista, tornando-o um profissional competente e responsável.
The present report of clinical activity is about a reflective study of the author work during the time where she performed clinical work (since April 2016 to June 2018) in the University Dental Clinic of UCP (, Health Sciences Institute, Viseu). It allows this way, the introspection of the knowledge acquired previously, in order to create a solid base of references for future work. A descritive statistic stydy was performed on the sample of patients whose treatment was performed by the authors clinic duo. This analysis was initially carried out in a general way, characterizing the type of work (distribution by disciplinary area and according to the author's action as operator / assistant) or according to the individual characteristics (gender, clinical history, risk habits). The specific analysis for each subject area was then performed. Namely for the areas: Oral Medicine, Operative Dentistry, Periodontology, Pediatric Dentistry, Endodontics, Oral Surgery, Removable Prosthesis, Fixed Prosthesis, Occlusion and Orthodontics. Were studied the sample specifications of each one, in relation to the determined diagnoses, type of treatment performed and level of collaboration. The work done during the five years of training and consequent knowledge acquired become decisive to develop the autonomous capabilities of the future Dentist, making him a competent and responsible professional.

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Rodolfo, Ana Francisca Lima de Matos Silvestre. "Relatório de atividade clínica." Master's thesis, 2020. http://hdl.handle.net/10400.14/31037.

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A Medicina Dentária é uma área multidisciplinar que promove a saúde oral na população através de prevenção, diagnóstico e tratamento, de forma a reabilitar a função e a estética do aparelho estomatognático. Apesar dos programas de prevenção e manutenção da saúde oral estarem a proporcionar uma diminuição do edentulismo total, o aumento da esperança média de vida tem provocado um crescimento da população parcialmente desdentada. A formação base de um médico dentista inclui o conhecimento da anatomia e das funções biológicas, assim como das lesões e patologias que englobam a boca, dentes, maxilares e tecidos envolventes, com o intuito de atuar quer de forma preventiva quer de forma terapêutica. O presente Relatório de Atividade Clínica descreve a atividade clínica realizada pela autora na Clínica Dentária Universitária da Universidade Católica Portuguesa, realizada ao longo do 5º ano do Curso de Mestrado Integrado em Medicina Dentária no ano letivo de 2019-2020, e tem como objetivo o término do 2º ciclo de estudos, correspondente ao Mestrado Integrado em Medicina Dentária (MIMD). Este trabalho encontra-se dividido em duas partes, que consistem numa análise quantitativa e qualitativa dos pacientes atendidos e dos atos realizados nas diversas disciplinas: Cirurgia Oral, Dentisteria Operatória, Endodontia, Medicina Oral, Oclusão, Odontopediatria, Ortodontia, Periodontologia, Prostodontia Fixa e Prostodontia Removível, e numa segunda parte na apresentação e discussão de 3 casos clínicos diferenciados. O primeiro caso no âmbito das disciplinas de Cirurgia Oral e Prótese Removível, o segundo no da disciplina de Prótese Removível e o último caso relacionado com a área de Periodontologia.
Dental Medicine is a multidisciplinary area which promotes oral health in the population through prevention, diagnosis and treatments, in order to rehabilitate function and aesthetics of the stomatognathic system. In spite of prevention and maintenance programmes in oral health providing a decrease in total edentulism, in contrast the increase of average lifespan has caused a growth in the partially toothless population. The basic training of a dentist includes the knowledge of anatomy and biological functions as well as injuries and pathologies affecting the mouth, teeth, jaws and associated tissues in order to act in prevention and treatment of oral pathologies. The current Clinical Activity Report describes the clinical activity carried out by the author at the University Dental Clinic of the Portuguese Catholic University throughout the 5th Year of the Master’s Program in Integrated Dental Medicine in the school year of 2019-2020 and is aimed to enclose the Integrated Master’s Degree in Dental Medicine (MIMD). This work is divided into two parts consisting of a quantitative and qualitative analysis of the patients accompanied by the author, in multiple areas such as: Oral Surgery, Dentistry, Endodontics, Oral Medicine, Occlusion, Odontopediatrics, Orthodontics, Periodontology, Fixed Prosthodontics and Removable Prosthodontics and the presentation and discussion of three different clinical cases. The first case relating to Oral Surgery and Removable Prothesis, the second to Removable Prosthodontics and the last related to Periodontology.

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Ahmadi, Motahareh. "Development and evaluation of a research-based prosthodontic clinical record." Thèse, 2012. http://hdl.handle.net/1866/8556.

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Introduction: Bien que l'importance de transférer les données de la recherche à la pratique a été largement démontrée, ce processus est toujours lent et fait face à plusieurs défis tels que la conceptualisation des évidences, la validité interne et externe de la recherche scientifique et les coûts élevés de la collecte de grandes quantités de données axées sur le patient. Les dossiers dentaires des patients contiennent des renseignements valables qui donneraient aux chercheurs cliniques une opportunité d'utiliser un large éventail d'informations quantitatives ou qualitatives. La standardisation du dossier clinique permettrait d’échanger et de réutiliser des données dans différents domaines de recherche. Objectifs: Le but de cette étude était de concevoir un dossier patient axé sur la recherche dans le domaine de la prosthodontie amovible à la clinique de premier cycle de l’Université de Montréal. Méthodes: Cette étude a utilisé des méthodes de recherche-action avec 4 étapes séquentielles : l'identification des problèmes, la collecte et l'interprétation des données, la planification et l’évaluation de l'action. Les participants de l'étude (n=14) incluaient des professeurs, des chercheurs cliniques et des instructeurs cliniques dans le domaine de la prosthodontie amovible. La collecte des données a été menée à l’aide d’une revue de littérature ciblée et complète sur les résultats en prosthodontie ainsi que par le biais de discussions de groupes et d’entrevues. Les données qualitatives ont été analysées en utilisant QDA Miner 3.2.3. Résultats: Les participants de l'étude ont soulevé plusieurs points absents au formulaire actuel de prosthodontie à la clinique de premier cycle. Ils ont partagé leurs idées pour la conception d'un nouveau dossier-patient basé sur 3 objectifs principaux: les objectifs cliniques, éducatifs et de recherche. Les principaux sujets d’intérêt en prosthodontie amovibles, les instruments appropriés ainsi que les paramètres cliniques ont été sélectionnés par le groupe de recherche. Ces résultats ont été intégrés dans un nouveau formulaire basé sur cette consultation. La pertinence du nouveau formulaire a été évaluée par le même groupe d'experts et les modifications requises ont été effectuées. Les participants de l'étude ont convenu que le cycle de recherche-action doit être poursuivi afin d'évaluer la faisabilité d’implémentation de ce dossier modifié dans un cadre universitaire. Conclusion: Cette étude est une première étape pour développer une base de données dans le domaine de la prothodontie amovible. La recherche-action est une méthode de recherche utile dans ce processus, et les éducateurs académiques sont bien placés pour mener ce type de recherche.
Introduction: Although the importance of research translating into practice has been widely recognized, this process is still slow and faces several barriers such as conceptualizations of evidence, internal and external validity of the evidence and high costs of providing large amounts of patient-based outcome data. Patient’s dental records contain valuable information that would give clinical researchers an opportunity to use a wide range of quantitative or qualitative information. Standardization of clinical record would allow the interoperability and reusability of data in different research fields. Objectives: The aim of this study was to design a research-based patient record in the field of removable prosthodontics in the undergraduate clinic of the “Université de Montréal.” Methods: This study used action research methods with 4 sequential steps: problem identification, gathering and interpreting data, action planning, and action evaluation. Study participants included professors, clinical researchers, and clinical instructors in the field of removable prosthodontics. Data collection consisted of a comprehensive literature review on prosthodontic outcomes as well as focus-group discussions and interviews. The qualitative data were analysed using QDA Miner 3.2.3. Results: The study participants raised several concerns about the deficiencies of the existing patients’ prosthodontic record in the undergraduate clinic. They shared their ideas for designing a new patient record based on 3 key objectives: clinical, educational, and research objectives. The prosthodontic outcomes of interest and appropriate instruments as well as the clinical parameters were selected by the research group and were integrated into a new research-based record. The appropriateness of the new record has been evaluated by the same panel of experts and the necessary modifications have been carried out. The study participants agreed that the action research cycle should be continued to evaluate the feasibility of the implementation of this redesigned record in the university-based setting. Conclusion: This study is a beginning effort to develop a database in the field of removable prosthodontics. Action research is a useful research method in this process, and academic educators are well placed to conduct such research.

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Ghawi, Maha. "The impact of nocturnal wear of the prosthesis on the oral health-related quality of life of an apneic edentulous population." Thesis, 2019. http://hdl.handle.net/1866/23983.

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Résumé Problématique : La perte de dents est l’une des maladies chroniques associées à plusieurs altérations anatomiques et fonctionnelles de la cavité buccale et des voies respiratoires supérieures. Ces changements entraînent une détérioration de la qualité de vie liée à la santé bucco-dentaire (OHRQoL), en particulier chez les personnes âgées. Les prothèses complètes permettent d’améliorer l'apparence et peuvent restaurer certaines fonctions masticatoires altérées par l’édentement, créant ainsi un impact positif sur la qualité de vie liée à la santé buccodentaire. Cependant, le port continu des prothèses dentaires pendant la nuit, peut amener des problèmes de santé buccodentaires. Toutefois, certaines études ont montré que le fait de dormir avec une prothèse dentaire avait un impact positif sur la qualité du sommeil et la qualité de la vie. Objectifs : L’objet de ce projet de maîtrise est d’étudier l’impact du port nocturne des prothèses complètes sur l’OHRQoL, chez les patients âgés édentés et souffrant d’apnée obstructive du sommeil (AOS). Méthodologie : Ce projet de maîtrise est imbriqué dans un essai clinique croisé randomisé portant sur 70 patients âgés (65 ans et plus), complètement édentés et diagnostiqués avec une AOS modérée à sévère (IAH ≥ 10). Les participants ont été assignés au hasard à l'un des deux groupes (dormant avec ou sans les prothèses dentaires dans un ordre inverse), pendant deux périodes de 30 jours. Les données sur les effets du port nocturne des prothèses dentaires sur la qualité de vie liée à la santé et la qualité de vie liée à la santé buccodentaire ont été recueillies au début et au cours des deux visites de suivi, à l’aide du questionnaire Oral Health Impact Profil (OHIP-20) et du formulaire abrégé SF-36 respectivement. L'analyse des données a été réalisée à l'aide de modèles à effets mixtes pour les mesures répétées, considérant notamment le type d'intervention (dormir avec ou sans prothèses), la séquence d’intervention et la période. Résultats: Les résultats rapportés ci-dessous sont basés sur les données recueillies auprès de 63 patients. Le score global de l’OHIP-20 était légèrement plus élevé, mais non significatif (p=0.08), chez les patients qui dormaient avec leurs prothèses que chez ceux qui dormaient sans prothèses. Les scores de toutes les sous-échelles du questionnaire OHIP-20 ont augmenté chez les patients qui dormaient avec leurs prothèses, à l’exception de l’incapacité sociale, qui a légèrement diminué, et de handicap qui est resté inchangé. Cependant, l’impact négatif significatif n’a été signalé que pour deux scores de l’OHIP-20 : psycho-inconfort (p = 0,04) et incapacité physique (p = 0,05). Les scores OHIP-20 n’ont été influencés ni par la séquence de randomisation ni par le nombre de visites, à l’exception des scores de handicap, qui ont légèrement augmenté chez les sujets assignés à dormir avec leurs prothèses dentaires au cours de la première période de cette étude. En revanche, les résultats du SF-36 ont montré une amélioration des scores moyens de toutes les sous-échelles chez les personnes dormant avec leurs prothèses, mais les seuls impacts significatifs étaient constatés sur les aspects de la fonction sociale et du changement de l’état de santé (p <0,01 et p = 0,01 respectivement). La séquence d'attribution a eu un effet significatif sur la fonction physique (p = 0,03), la douleur (p = 0,02) et le changement de santé (p = 0,02). Le nombre de visites de suivi n'a eu un impact significatif que sur le domaine de la fonction physique (p = 0,03). Conclusion : Bien que dormir avec les prothèses dentaires puisse avoir un impact négatif sur les aspects psychiques et physiques d’OHRQoL, il pourrait également avoir un impact positif sur les aspects sociaux de la fonction et des changements de santé de la HRQoL. Les résultats de la recherche de ce travail de maitrise doivent être considérés comme préliminaires car l’analyse totale des données n’est pas encore terminée.
Problematic: Tooth loss is one of the chronic diseases associated with several anatomical and functional alterations in the oral cavity and the upper airway tract. These changes result in the deterioration in oral health-related quality of life (OHRQoL), particularly among the elderly. Complete dentures can enhance the appearance and restore some impaired masticatory functions, creating a positive impact on OHRQoL. However, continuous nocturnal wear of dentures may raise oral health problems. In contrast, some studies have found that the impact of sleeping with dentures is positive with regard to the quality of sleep and quality of life. Objectives: The aim of this Master’s study is to investigate the impact of sleeping with dentures on OHRQoL in edentulous elderly patients who suffer from obstructive sleep apnea (OSA). Methodology: This master research project is nested in a randomized, crossover trial study of 70 edentulous elderly patients diagnosed with moderate to severe OSA (AHI ≥10). The participants were randomly assigned to one of two groups (sleeping with or without the prosthesis in opposite order), for two periods with a 30-day interval between them. Data on the effect of nocturnal wearing of dentures on OHRQoL and health-related quality of life (HRQoL) were collected at the baseline and during the two follow-up visits, using the Oral Health Impact Profile (OHIP-20) and Short form (SF-36) questionnaires respectively. Data analysis was performed using mixed effect models appropriate for repeated measures including types of intervention (sleeping with or without dentures), sequence and visit number. Results: Results reported below are based on data collected from 63 patients. The overall OHIP-20 score was slightly higher among patients who wore their dentures while sleeping than in those who did not, but not at a significant level (p=0.08). The scores of all OHIP-20 subscales were increased among patients who slept with prosthesis, except for the social disability which slightly decreased, and the handicap remained at the same average. However, the significant negative impact was reported only for two OHIP scores: psycho-discomfort (p=0.04) and physical disability (p=0.05). OHIP-20 scores were influenced neither by the assignment sequence nor by the period, with an exception for handicap scores which slightly increased among elders assigned to sleep with dentures in the first period of this study. In contrast, SF-36 results showed an improvement in the mean scores in all subscales among the elderly when participants were sleeping with dentures, but the only significant impacts were found on social function and health change aspects (p <0.01, and p=0.01, respectively). The assignment sequence had a significant effect on physical function (p=0.03), pain (p=0.02), and health change (p=0.02). The follow-up visit number had a significant impact only on the physical function domain (p=0.03). Conclusion: While sleeping with dentures could have a negative impact on psycho-discomfort and physical discomfort aspects of OHRQoL, it could have a positive impact on the social function and health change aspects of HRQoL. The results of this Master’s research should be considered as preliminary since the total data analysis has not completed yet.

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Bezerianos, Joanna. "Étude transversale sur l’asepsie des articles transférés entre la clinique et le laboratoire dentaire et de l’instrumentation de laboratoire." Thèse, 2009. http://hdl.handle.net/1866/4152.

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Les mesures de contrôle de la contamination croisée sont principalement concentrées dans la salle opératoire dentaire alors que les articles transférés entre la clinique et le laboratoire dentaire et les instruments de laboratoire ont reçu peu d’attention. Cette étude vise à documenter l’application des mesures d’asepsie sur ces articles par les professionnels du domaine dentaire ainsi que leurs perceptions entourant ces mesures. Un questionnaire autoadministré et anonyme a été envoyé à un échantillon aléatoire des dentistes, denturologistes et directeurs de laboratoire dentaire qui étaient inscrits aux listes des ordres professionnels en juin 2008 dans la province de Québec. Des 1100 questionnaires envoyés, 376 ont été retournés remplis. Presque trois quarts (72,1 %) des répondants affirment faire l’asepsie des instruments de laboratoire et 74,9 %, la désinfection des articles transférés mais avec des pourcentages variables selon le groupe d’articles (empreintes, prothèses, etc.). Seulement 9,1 % de professionnels identifient de façon générale les articles désinfectés avant l’envoi. Plus de la moitié des professionnels (51,4 %) trouvent qu’ils n’ont pas assez d’information sur l’asepsie des articles transférés et 62,4 %, qu’elle est difficile à appliquer. Cette étude est la première réalisée auprès des trois groupes de professionnels et la première à étudier leurs perceptions entourant l’asepsie des articles transférés et de l’instrumentation de laboratoire. Nous avons démontré que l’application des mesures d’asepsie à ces articles par les professionnels du domaine dentaire n’est pas toujours conforme aux normes proposées et qu’il existe un besoin de renforcer leur application, surtout en ce qui a trait aux articles transférés.
Infection control practices have been mainly concentrated in the dental operatory whereas the articles transferred between the dental clinic and the dental laboratory as well as laboratory instruments have received less attention. This study attempts to document the practices of dental care professional implicated in the fabrication of dental prosthesis as to the asepsis of these items as well as their perceptions towards it. In June 2008 an auto-administrated and anonymous questionnaire was sent to a random sample of dentists, denturologists and dental laboratory directors licensed to practice in the province of Quebec (Canada). From the 1,100 questionnaires sent, 376 were returned filled-in. Almost two thirds of responders (72.1%) claim to disinfect or sterilize laboratory instruments and 74.9% to disinfect transferred articles, with percentages varying according to the group of articles (impressions, prosthesis, etc.). However, only 9.1% regularly identify disinfected work. More than half of the responders (51.4%) think it is difficult to apply a form of asepsis on transferred articles and 62.4% believe there is a lack of information towards it. This study is the first to have been addressed simultaneously to the three groups of professionals and the first to question them on their perceptions. It demonstrated that the application of asepsis measures to transferred articles and laboratory instruments by dental care professionals is not always complying with existing recommendations. There is a need to reinforce their application, especially of asepsis measures on transferred articles.

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Pimenta, Diogo Henrique Gonçalves. "Relatório de atividade clínica." Master's thesis, 2020. http://hdl.handle.net/10400.14/31071.

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O presente relatório destina-se a realizar uma análise e discussão fundamentadas da atividade clínica realizada pelo seu autor durante o último ano de formação no Mestrado Integrado de Medicina Dentária (MIMD) da Universidade Católica Portuguesa de Viseu, no período compreendido entre setembro de 2019 e maio de 2020. Trata-se de um método que, permitindo a valorização do futuro profissional no mercado de trabalho, leva a uma profunda reflexão de toda a prática realizada em contexto clínico, com os seus êxitos e as suas falhas, constituindo-se como uma base de aprendizagem muito forte. A ação clínica foi obtida através de dois contextos clínicos com marcadas diferenças, no primeiro semestre no Hospital Odontològic da Universidade De Barcelona, Campus de Bellvitge- Fundació Josep Finestres, em Espanha no âmbito do programa de mobilidade Erasmus + , e o segundo semestre na Clínica Dentária Universitária da Faculdade de Medicina Dentária da Universidade Católica Portuguesa de Viseu. Esta exposição pretende, também, descrever um pouco desta experiência única de contacto com diferentes culturas, formas de trabalhar, procedimentos, ao aumento da capacidade de adaptação a meios adversos através da recolha de dados elaborada, realizando uma contextualização do paradigma da Medicina Dentária em Portugal e Espanha. Os dados recolhidos foram inseridos e avaliados numa base de dados realizada na plataforma Microsoft Office Excel® (2019) (Microsoft®, EUA) tendo-se a partir daí realizado uma análise estatística descritiva fazendo-se referência a aspetos mais gerais como a área disciplinar inserida (sendo que o primeiro semestre foi em contexto de clínica integrada) e a intervenção como operador/assistente e seguidamente a características que dizem respeito ao paciente como a idade, o sexo, o número de consultas, a história clínica, a medicação e os fatores de risco. A frequência nas mais variadas áreas disciplinares conduz o estudante a uma melhor preparação para enfrentar a diversidade de casos que poderão chegar-lhe ao consultório dentário, sendo que as disciplinas com prática clínica foram: Clínica Integrada, Dentisteria Operatória, Ortodontia, Oclusão, Cirurgia Oral, Endodontia, Periodontologia, Prótese Removível, Prótese Fixa, Odontopediatria e Medicina Oral. Por fim, são apresentados casos clínicos concretos com uma ponderação crítica com recurso a referências bibliográficas de literatura científica existente e atualizada.
The purpose of this report is to conduct a reasoned analysis and discussion of the clinical activity carried out by the author of the work during his last year of training in the Integrated Master of Dental Medicine (MIMD) of the Universidade Católica Portuguesa de Viseu, in the period between September 2019 and May 2020. It is a method that, allowing the valorization of the professional future in the job market, leads to a deep reflection of the whole practice carried out in a clinical context, with its successes and failures, constituting itself as a very strong learning base. The clinical action was obtained through two clinical contexts with marked differences, in the first semester at the Hospital Odontològic of the University of Barcelona at Campus of Bellvitge-Fundació Josep Finestres, in Spain under the Erasmus + mobility program and the second semester at the Universitary Dental Clinic of the Faculty of Dental Medicine of the Universidade Católica Portuguesa de Viseu. This exhibition also intends to describe a little of this unique experience of contact with different cultures, ways of working, procedures, increasing the capacity to adapt to adverse environment through the elaboration of clinical data, creating a contextualization of the Dental Medicine paradigm in Portugal and Spain. The collected data were inserted and evaluated in a database carried out on the Microsoft Office Excel® platform (2019) (Microsoft®, USA having since then carried out a descriptive statistical analysis referring to more general aspects such as the subject area inserted (the first semester was in the context of an integrated clinic) and the intervention as an operator / assistant and then the characteristics that concern the patient, such as age, sex, number of consultations, clinical history, medication and risk factors. The frequency in the most varied disciplinary areas leads the student to a better preparation to face the diversity of cases that may reach him / her in the dental office, and the disciplines with clinical practice were: Integrated Clinic, Operative Dentistry, Orthodontics, Occlusion, Oral Surgery , Endodontics, Periodontology, Removable Prosthesis, Fixed Prosthesis, Pediatric Dentistry and Oral Medicine. Finally, concrete clinical cases are presented with a critical weighting using bibliographic references of existing and updated scientific literature.

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Silveira, Bernardo Mattos da. "Processos para o planeamento em reabilitação oral." Master's thesis, 2019. http://hdl.handle.net/10284/8360.

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Uma reabilitação oral consiste na reestruturação dos requisitos funcionais e estéticos imprescindíveis para o restabelecimento do sistema estomatognático. A previsibilidade e a longevidade de uma reabilitação oral dependem de um planeamento adequado e bem executado. A maioria dos casos requer uma interdisciplinaridade, envolvendo várias áreas de atuação como Periodontia, Endodontia, Dentística, Ortodontia, Cirurgia e Implantodontia. Para o planeamento de uma reabilitação oral devemos obter o máximo de informações para que seja possível a elaboração de um estudo detalhado do caso seguindo uma ordem de execução. O seguinte trabalho é uma revisão de literatura e tem como objetivo definir um protocolo de planeamento para uma reabilitação oral, baseado na padronização dos seus procedimentos. Para tal é necessário determinar as etapas, através de análises estéticas e funcionais do paciente, que compõe um tratamento reabilitador mais complexo. É de extrema importância estabelecer um protocolo de planeamento na reabilitação oral, visando minimizar possíveis falhas e obter sucesso e longevidade do tratamento a ser executado.
An oral rehabilitation consists of the restructuring of essential functional and aesthetic requirements for the restoration of the stomatognathic. The predictability and longevity of oral rehabilitation depends on proper and well-executed planning. Most of the cases require an interdisciplinarity, involving several areas of practice such as Periodontics, Endodontics, Dentistry, Orthodontics, Surgery and Implantology. For the planning of an oral rehabilitation we must get the maximum information so that it is possible to elaborate a detailed study of the case following an order of execution. The following work is a literature review and aims to define a planning protocol for an oral rehabilitation, based on the standardization of its procedures. For this it is necessary to determine the steps, through aesthetic and functional analyzes of the patient, that composes a more complex rehabilitation treatment. It is extremely important to establish a planning protocol in oral rehabilitation, in order to minimize possible failures and to obtain success and longevity of the treatment to be performed.

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Alesawy, Aminah. "Within-subject comparison of two- versus three-implant-assisted mandibular overdenture : patient-based outcomes." Thèse, 2018. http://hdl.handle.net/1866/21349.

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Audy, Nicholas. "La survie implantaire suite à une réhabilitation par mise en charge immédiate d’une prothèse totale mandibulaire reliée à deux implants non jumelés : une étude pilote expérimentale." Thèse, 2013. http://hdl.handle.net/1866/10077.

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Problématique : Les connaissances théoriques et pratiques au sujet de la mise en charge immédiate d’implants non jumelés chez les édentés sont limitées. Objectifs : Cette étude avait pour but de : (1) déterminer le taux de survie implantaire de 2 implants non jumelés supportant une prothèse totale mandibulaire suite à une mise en charge immédiate, (2) évaluer les changements des niveaux osseux et de stabilité implantaire survenus sur ces 2 implants durant une période de 4 mois et les comparer à un implant témoin, et (3) décrire les complications cliniques associées à ce mode de mise en charge. Méthodologie : Chez 18 individus édentés (âge moyen de 62±7 ans), cette étude de phase I avec un design pré/post a évalué les résultats cliniques suivant la mise en charge immédiate (<48 heures) de 2 implants non jumelés par une prothèse totale mandibulaire. À l’aide de radiographies périapicales, de sondages osseux et d’analyses de la fréquence en résonnance, les niveaux osseux péri-implantaires (en mm) et les niveaux de stabilité implantairte (en ISQ) de ces 2 implants insérés dans la région parasymphysaire ont été évalués à la chirurgie (T0) et au suivi de 4 mois (T1). Un implant non submergé et sans mise en charge inséré dans la région de la symphyse mandibulaire a été utilisé comme témoin. Les données ont été analysées avec des modèles mixtes linéaires, la méthode de Tukey ajustée, l’analyse de variance de Friedman et des tests de rang signés de Wilcoxon. Résultats : De T0 à T1, 3 implants mis en charge immédiatement ont échoué chez 2 patients. Le taux de survie implantaire obtenu était donc de 91,7% (33/36) et, par patient, de 88,9% (16/18). Aucun implant témoin n’a échoué. Les changements osseux documentés radiologiquement et par sondage autour des implants mis en charge immédiatement étaient, respectivement, de -0,2 ± 0,3 mm et de -0,5 ± 0,6 mm. Les pertes d’os de support implantaire n’ont pas été démontrées statistiquement différentes entre les implants avec mise en charge immédiate et les témoins. Les niveaux moyens de stabilité implantaire ont augmenté de 5 ISQ indépendamment de la mise en charge. Les niveaux moyens d’ISQ n’ont pas été démontrés statistiquement différents entre les implants avec mise en charge immédiate et les témoins à T0 ou T1. Cinq des 18 patients n’ont expérimenté aucune complication clinique, alors que 9 en ont eu au moins deux. Hormis les échecs implantaires, aucune de ces complications n’a entraîné de changements au protocole. Conclusion : Les résultats à court terme suggèrent que : (1) le taux de survie implantaire suite au protocole immédiat est similaire à ceux rapportés lors d’un protocole de mise en charge conventionnel (2) les changements d’os de support implantaire et de stabilité ne sont pas différents comparativement à ceux d’un implant témoin, (3) un niveau élevé d’expérience clinique et chirurgicale est requis pour effectuer les procédures et pour gérer les complications associées. Ces résultats préliminaires devraient être confirmés dans une étude clinique de phase II.
Problem: There is a theoretical and practice knowledge gap in regard to immediate loading of unsplinted implants in edentulous individuals. Objectives: This study aimed to: (1) determine the implant survival rate of 2 unsplinted implants supporting a mandibular complete overdenture following an immediate loading protocol, (2) assess marginal bone level and implant stability changes of these immediately loaded implants in a 4-month period and compared them to a control implant, and (3) describe the clinical complications associated with this mode of loading. Methods: In 18 edentate individuals (mean age 62±7 years), this phase-I trial with a pre/post design assessed the clinical outcomes following the immediate loading (<48 hours) of 2 unsplinted implants supporting a mandibular overdenture. Periapical radiograhs, bone probing measurements and resonance frequency analysis were used to assess marginal bone losses and implant stability changes of these two implants inserted in the mandibular parasymphyseal region, at baseline (T0) and 4-month follow-up (T1). A non-submerged and non-loaded implant inserted in the mandibular symphysis was used as a control. Data were analyzed using linear mixed models, adjusted Tukey tests, Friedman’s analysis of variance and Wilcoxon signed-ranks tests. Results: From T0 to T1, 3 immediately loaded implants failed in 2 patients. This resulted in an implant survival rate of 91.7% (33/36), and, per patient, of 88.9% (16/18). No control implant failed. The marginal bone losses around loaded implants were -0.2 ± 0.3 mm for radiographic measurements and -0.5 ± 0.6 mm for probing measurements. There was no statistically significant difference between immediately loaded and control implants in regard to the supporting marginal bone losses. The implant stability levels increased of 5 ISQ units regardless of loading. There was no statistically significant difference in the mean ISQ levels between immediately loaded and control implants at T0 or T1. Five out of 18 patients experienced no clinical complication, while 9 of them had at least two. Apart from implant failures, none of these clinical complications led to changes in the protocol. Conclusion: The short-term results suggest that: (1) the implant survival rate following the immediate protocol is similar to those reported during a conventional loading protocol, (2) marginal implant supporting bone and stability changes are not different compared to those of a control implant, (3) a high level of clinical and surgical experience is required to perform the procedures and to manage the associated complications. These preliminary results should be confirmed in a phase II clinical trial.

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Duarte, Claudia Berta. "Biocompatibilidade das principais ligas metálicas utilizadas em medicina dentária em Portugal." Master's thesis, 2017. http://hdl.handle.net/10284/6140.

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As ligas metálicas utilizadas em medicina dentária podem influenciar não apenas a qualidade e durabilidade das próteses e implantes dentários como também a saúde dos tecidos orais e até sistémicos. Antigamente os efeitos biológicos das ligas metálicas e materiais dentários eram ignorados em estudos e totalmente desconhecidos, porém com o passar do tempo observou-se a influência direta e indireta da biocompatibilidade destes metais e ligas metálicas no sucesso dos tratamentos dentários de reabilitação. O objetivo deste estudo é apresentar conteúdos atualizados e conceitos já conhecidos e comprovados através de uma revisão da literatura existente sobre o biocompatibilidade das ligas metálicas mais utilizadas em medicina dentária em Portugal. Para a presente revisão bibliográfica, foi realizada uma pesquisa bibliográfica com recurso a livros e artigos publicados em revistas, e que foram consultados nas Bibliotecas da Faculdade de Medicina Dentária da Universidade do Porto e da Universidade Fernando Pessoa. Procedeu-se à pesquisa por recurso aos motores de busca na internet, tais como, PubMed, Scielo, B-On e Medline, utilizando as seguintes palavras-chave, em conjunto ou individualmente: Ligas metálicas, prótese dentária, reabilitação dentária, reabilitação oral, biocompatibilidade, citotoxicidade, liberação, iões, titânio, cobalto, cromo¨. Foram selecionados artigos entre 1980 e 2017, com relevância para o presente trabalho de dissertação de Mestrado, escritos em Português e Inglês.
Metal alloys used in dentistry can influence not only the quality and durability of dental prosthesis and dental implants as well as oral health and even systemic tissues. In the past years, the biological effects of metal alloys and dental materials have been ignored and unknown in scientific studies, but over the following years it could be observed the direct and indirect influences of the biocompatibility of those metals and metal alloys in dental rehabilitation treatments success. The aim of this study is organize and include an updated scientific content and known concepts and through a review of existing literature about the biocompatibility of metal alloys used in dentistry in Portugal. For this bibliographic review, a bibliographic research was performed with the use of books and articles published in journals, which were consulted in the libraries of the Dental Faculty of the University of Porto and the Fernando Pessoa University. The research was carried out by resource to internet search engines such as PubMed, Scielo, B-On and Medline, using the following keywords, jointly or individually: metal alloys, dental alloys, dental prosthesis, dental rehabilitation, oral rehabilitation, biocompatibility, release, ions, titanium, cobalt, chromium, nickel, dentistry. Articles were selected between 1980 and 2017, with relevance to the present work of the Master thesis, written in Portuguese and English.

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Brito, Alcides Filipe Mesquita de. "Magnificação em medicina dentária." Master's thesis, 2017. http://hdl.handle.net/10284/5896.

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A magnificação, que nos remete para a ampliação de imagem real e suporte visual, tem vindo ao longo dos anos, a ser aplicada a vários campos da medicina e da ciência e, sobretudo explorada em áreas como a biologia, a optometria e as investigações que requerem a observação minuciosa de microorganismos. À medida que a tecnologia dos microscópios se desenvolve e agrega maiores e melhores capacidades, também os profissionais de saúde vão aferindo dos benefícios que estes instrumentos trazem para o exercício das suas profissões sendo cada vez mais consensual a ideia de que a magnificação agrega valor ao trabalho dos médicos dentistas. Tomando como ponto de partida a necessidade de explorar com vista a conhecer em profundidade a magnificação, levamos a cabo uma revisão bibliográfica narrativa que visou avaliar a importância das tecnologias de magnificação no desenvolvimento e melhoria das condições de trabalho dos médicos dentistas em todas as áreas de intervenção da ciência dentária Os resultados dos estudos analisados parecem convergir para a ideia generalizada de que a magnificação é de extrema importância, apresentando-se mesmo, como o futuro das práticas da medicina dentária, sendo que as desvantagens que lhe são inerentes, os custos e o período de adaptação, parecem ser suplantadas pelas vantagens que oferece, ou seja o aumento da capacidade visual e da qualidade do tratamento, a melhoria das condições ergonómicas, a facilidade de criação de registos de documentação digital e a melhoria da comunicação entre os técnicos e os pacientes.
Magnification, which refers to the real image amplification and visual support of real images in real time, has been applied to various fields of medicine and science, over the years, and is, above all, explored in areas such as biology, optometry and investigations that require close observation of microorganisms. As the technology of microscopes develops and delivers bigger and better capabilities, health professionals perceive the benefits that these tools brings to the exercise of their métiers, and, therefore, the idea that the magnification adds value to the work of Medical dentists is being increasingly accepted amongst professional community. Taking as its starting point the need to explore in order to know deeply the magnification, we carry out a literature review with the aim to assess the importance for the development and improvement of dentists working conditions, in all areas intervention of dental science, of magnification technologies. The results of the studies analyzed seem to converge to the widespread idea that the magnification is of utmost importance, presenting itself as the future of the practice of dentistry, and the disadvantages that are inherent to it, such as high costs and the need for adaptation, seem to be outweighed by the advantages it offers, like the increasing of visual capacity and the improvement of the quality of the treatment, as well as the amelioration of ergonomics and the ease on making digital documentation and establishing communication between technicians and patients.

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