Dissertations / Theses on the topic 'Complete dentures'
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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.
Full textSilva, Manoela Capla de Vasconcellos dos Santos da 1983. "Efetividade da desinfecção por energia de microondas de três resinas acrílicas contaminadas por leveduras do gênero Candida." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288563.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: Neste estudo o objetivo foi avaliar a efetividade da irradiação por energia de microondas na desinfecção de resinas acrílicas para confecção de próteses totais. Setenta e dois corpos-deprova em resina acrílica de diferentes tipos (Vipi convencional, Vipi Wave e Vipi convencional) foram confeccionados de forma padronizada e submetidos à esterilização com óxido de etileno. Na parte superior dos corpos-de-prova foram inoculados 100 µL do inóculo de uma das três espécies de Candida e posterior colocação em estufa a 37°C por 1 hora e 30 minutos para a realização da primeira aderência. Após este tempo, cada poço foi completado com meio estéril e a placa novamente levada à estufa para incubação a 37°C por 6 horas. Após essa incubação, os 54 corpos-de-prova foram imersos em 10 mL de água estéril e irradiados por energia de microondas a 650 W por 3 minutos. Dezoito corpos-deprova não irradiados foram considerados grupo controle. Após a incubação por 48 horas, tanto as placas das amostras irradiadas quanto as não irradiadas foram submetidas à contagem de colônias em contador de colônias digital. Os números de unidades formadoras de colônias por mililitro foram calculados e comparados estatísticamente para verificação da efetividade do método de desinfecção proposto. As semeaduras das placas de Petri referentes aos corpos-de-prova irradiados (grupo experimental) não apresentaram colônias viáveis para todos os microorganismos avaliados após incubação a 37ºC por 48 horas. Os resultados demonstraram efetiva esterilização após 3 minutos de irradiação a 650 W para todos os corpos-de-prova do grupo experimental. Os corpos-de-prova do grupo controle (não irradiadas) apresentaram crescimento microbiano após 48 horas de incubação. A irradiação por microondas a 650 W por 3 minutos mostrou ser um método efetivo na esterilização dos corpos-de-prova inoculados com C. albicans, C. dubliniensis e C. tropicalis
Abstract: The objective of this study was to evaluate the effectiveness of microwave irradiation in the disinfection of acrylic resins for the fabrication of dentures. Seventy two specimens of acrylic resin of different types were made in a standardized and subjected to sterilization with ethylene oxide. The specimens were individually inoculated with100 µL of inoculums of three species of Candida, and later placed in an incubator at 37°C for 1 hour and 30 minutes to perform the first adhesion. After this time, each well was supplemented with sterile media and the plate once again brought to a stove for incubation at 37°C for 6 hours. After this incubation, the 54 specimens were immersed in 10 mL of sterile water and irradiated by microwave energy at 650 W for 3 minutes. Eighteen specimens were considered non-irradiated control group. After incubation for 48 hours, both plates of the irradiated samples as the non-irradiated were subjected to counting of colonies in colony digital counter. The number of colonies forming units per milliliter were calculated and compared to verify the effectiveness of the proposed method of disinfection. Cultivation of Petri plates relating to specimens irradiated (experimental group) showed no viable colonies for all microorganisms assessed after incubation at 37°C for 48 hours. The results demonstrated effective sterilization after 3 minutes of irradiation at 650W for all specimens the experimental group. Petri plates sown with the bodies corresponding specimens control group (not irradiated) showed microbial growth after 48 hours of incubation. A microwave irradiation at 650 W for three minutes proved to be an effective method of sterilization of the specimens inoculated with C. albicans, C. dubliniensis and C. tropicalis
Mestrado
Protese Dental
Mestre em Clínica Odontológica
Murray, Michael Dominic. "Physical aspects of complete denture retention." Thesis, [Hong Kong] : Faculty of Dentistry, University of Hong Kong, 1989. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12555009.
Full textAhmed, Rukshana. "Do patients' expectations influence their satisfaction with complete dentures?" University of the Western Cape, 2016. http://hdl.handle.net/11394/5601.
Full textBackground: Most edentulous patients have expectations regarding complete dentures that are not only dependant on past experiences but also the information they received from others. These expectations may impact on the level of satisfaction the patient would have when receiving their complete dentures. When determining levels of satisfaction, factors such as comfort, speech, aesthetics, mastication, retention, fit / stability and occurrence of pain should be assessed. The dental student should be able to clinically apply theoretical knowledge to provide the patient with a stable and retentive denture that fulfils their expectations on function and aesthetics. Not much has been written regarding this link between patients' expectations and satisfaction with complete dentures at the University of the Western Cape, thus it warranted further investigation. Aim: The aim of this study was to determine whether patients' expectations influence their satisfaction with new complete dentures constructed by undergraduate dental students. Objectives:- 1. To determine the expectations of the edentulous patients prior to receiving new complete dentures. 2. To determine if patients’ expectations influences satisfaction with new complete dentures. 3. To investigate the influence of socio-demographic factors on patients' satisfaction wearing complete dentures. 4. To determine if the level of experience of the undergraduate student influences patient satisfaction. Methodology: This was an observational study using two questionnaires for data collection namely the Patient Expectation Questionnaire and the Oral Health Impact Profile- 20. Socio-demographic data was collected as part of the first questionnaire. Each participant was given an individual case number that corresponded on both questionnaires. This facilitated correlation between the expectations and satisfaction results of individual patients. Results: The age range for the majority of the patients was between 56-65 years. Females made up 72% of the sample with 85% of the sample of coloured ethnicity. Statistical analysis included reliability testing of the Patient Expectation Questionnaire and the Cronbach's Alpha of .773 was recorded, which indicates good reliability. Results following analysis of the Oral Health Impact Profile-20 showed high levels of satisfaction in most domains. The correlation between patients' expectations and satisfaction with new complete dentures was not proven using Pearson correlation. However, the comparison between the expectations questionnaire and Oral Health Impact Profile-20 frequency distribution showed positive results and most expectations of the patient were met or even exceeded for certain domains. Conclusion: Once analysis of both questionnaires was completed high levels of expectations were recorded and these expectations were met in most domains. Even though the statistical relationship between patient expectations and satisfaction was not proven, analysis of the questionnaires yielded positive results. No association was found between pre-treatment expectation and patient satisfaction with complete dentures. Some socio-demographic factors influenced patient satisfaction with complete dentures. High levels of patient satisfaction were recorded regardless of the clinical experience of the undergraduate dental student.
Geerts, Greta Aimée Virginie Maria. "The neutral zone for mandibular complete dentures : a clinical trial." Thesis, University of the Western Cape, 2016. http://hdl.handle.net/11394/5025.
Full textRehabilitation of edentulous jaws without the option of osseointegrating implants will remain the only treatment option within reach of many older patients for the foreseeable future. Many routine prosthodontic procedures are based on dogmas, because no high-level scientific evidence exists to either accept or reject them, among these is the “neutral zone” (NZ) concept. In spite of paucity of evidence using approved patient-based outcome instruments, it is generally agreed that the NZ should be respected when constructing complete dentures. The purpose of this research project was to determine how shapes of conventional and NZ mandibular dentures differ, and if the two different types of dentures impact differently on oral health–related quality of life by using an accepted oral health-related quality of life instrument as a patient-based outcome. Thirty nine edentulous patients were selected for this prospective, randomised, cross-over, single-blinded clinical trial. Two sets of complete dentures were made for each patient. One denture set was made following conventional biometric guidelines for determining the position of the mandibular posterior denture teeth in relation to the ridge; another set was made following a functional impression of the potential denture space. Each set of dentures was worn for at least two months. A similar number of types of dentures were delivered first. Widths of residual ridges and mandibular denture arches were measured using digital measuring software. Position of denture teeth was related to the ridge. Denture dimensions were compared by means of analysis of variance using the mixed procedure. Using formula of parabola, arch-widths were compared using paired t-tests. Pre- and post-treatment patient feedback was obtained by means of the 20-item Oral Health Impact Profile (OHIP-20) and a preference score. Treatment effect size (ES) was established based on the OHIP-20 scores. Relevant associations among denture dimensions, OHIP-20 scores, preference, age, gender, marital status, education, income, period of edentulousness, and quality of denture-bearing tissue were done using the generalised linear model and correlation analysis. For all statistical analysis, level of significance was determined at p<0.05. The mean age of the sample was 62.3 years. Twenty four patients were female. Mean period of edentulousness was 31 years and mean number of denture sets worn prior to the trial was 2.5. Except for the canine region, NZ dentures were statistically wider than anatomic dentures. The difference in mean widths between the two types of dentures was larger for female patients. Older patients had smaller differences in denture dimensions. More unfavourable denture-bearing tissue was associated with a larger difference in the two types of dentures. Both types of mandibular dentures significantly improved the OHRQoL of patients. Both types of dentures had a high treatment ES. The OHIP-20 instrument could not distinguish a statistical difference in impact on OHRQoL between the two treatment options. There was a minute difference in treatment ES between the two types of treatment. The only domain representing a small clinical benefit between NZ and anatomic dentures was “physical pain”, with the NZ dentures scoring better. There was no correlation between pre- and post-treatment scores for both types of dentures. No significant associations were found between post-treatment OHIP- 20 scores on the one hand and tissue scores, gender, age, education, marital status, period of edentulousness and denture dimension differences on the other hand. Based on OHIP-20 scores, there was a significant association between denture preference and NZ dentures, but not for the other preferences. No significant associations were found between denture preferences on the one hand and tissue scores, gender, age, period of edentulousness and denture dimension differences on the other hand. Even though no significant relationship was found between preference and gender, the majority of female patients preferred the NZ denture and the majority of male patients did not express a preference. Providing new complete dentures improved OHRQoL of edentulous patients. The majority of female patients preferred the NZ compared over the ANA denture. The NZ technique appeared to have a higher positive impact on OHRQoL of female patients compared to male patients.
Saponaro, Paola Cristina. "Clinical performance of CAD/CAM fabricated complete dentures; A retrospective study and assessment of patient satisfaction." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1438885753.
Full textMcNaugher, Gillian A. "Developing a community index of complete denture treatment need." Thesis, Queen's University Belfast, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300775.
Full textFerreira, Daniel Filgueiras. "Avaliação eletromiografica da eficiencia de duas tecnicas de montagem de dentes artificiais em protese total dupla." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289924.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O objetivo desta pesquisa foi avaliar eletromiograficamente o padrão de atividade muscular resultante da utilização de duas técnicas de montagem de dentes artificiais para obtenção de equilíbrio em prótese total dupla. Vinte e quatro pacientes totalmente edêntulos, livres de sinais e sintomas de Desordem Temporomandibular (DTM) com no mínimo cinco anos de uso de próteses totais, foram separados em dois grupos de 12 pacientes: (G1 e G2). Para o G1, utilizou-se a técnica Convencional, onde o equilíbrio foi obtido através de contatos interferentes entre dentes artificiais. Para o G2, utilizou-se a técnica das Rampas Posteriores de Nóbilo, que proporciona equilíbrio através de contatos deslizantes entre a superfície das rampas. O padrão de atividade muscular foi mensurado através da atividade eletromiográfica (EMG) dos músculos temporais porção anterior e masseteres nas posições de repouso (R) e na contração isométrica em máxima intercuspidação (CIMI), avaliado em quatro tempos: T0 - instalação; T1 - 1o mês; T2 - 2o meses; T3 - 3o meses de uso das próteses. Foi utilizado o eletromiógrafo Myosystem I® (Prosecon Ltda, Uberlândia, MG, Brasil) e o sinal eletromiográfico condicionado através de filtro digital passa faixa e analisado em relação RMS (Root Mean Square). Em ambos os grupos, observou-se pequenas alterações nos valores da atividade EMG para os músculos temporais anteriores e masseteres na posição de R. Na posição de CIMI, no G1 os músculos temporais anteriores apresentaram valores finais menores que os iniciais, e situação inversa foi observada para os masseteres, com valores finais maiores que os iniciais; no G2 observou-se inversão dos valores para os músculos temporais anteriores e aumento para os masseteres com ligeiro equilíbrio no terceiro mês de avaliação. O teste Wilcoxon-Mann-Whitney entre as técnicas e o de Friedman nos tempos avaliados não mostraram diferenças estatísticas significativas (p<0.05). Conclui-se que as técnicas estudadas clinicamente não apresentaram diferença entre si, e que as avaliações nos tempos não proporcionaram o equilíbrio dos músculos mastigatórios estudados. Dessa forma, ambas técnicas podem ser utilizadas com performances clínicas semelhantes
Abstract: The aim of this study was to evaluate by the electromyography muscular activity pattern resulting of two prosthetic teeth arrangement techniques that promote balance in double complete dentures. Twenty-four subjects totally edentulous, free from signs and symptoms of TMJ disorders and with at least five years complete dentures use were divided in two groups of 12 subjects: G1 and G2. In the Group 1, the Conventional technique was used and the interference contacts between artificial teeth were responsible for the balance. In the Group 2, the Nóbilo's Balancing Ramps technique, slippery contacts between ramps surfaces provided balance. The muscular activity pattern was measured by electromyographic (EMG) activity of anterior temporal and masseter muscles in the mandibular rest (R) and maximal biting in the intercuspal position (CIMI) at four times: T0 - installation; T1 - 1st month; T2 - 2nd month; T3 - 3rd month of prostheses use. The electromyographic sign was collected with Myosystem I® conditioned through of digital filter pass band and analyzed in relation to RMS (Root Mean Square). In both groups, in the mandibular rest of the anterior temporal and masseter muscles was observed small alterations in the EMG activity values. In CIMI position, in the Group 1, anterior temporal muscles showed final values smaller than the initial, differently of masseter muscles that showed final values greater than the initial; in the Group 2 inversion values were observed in the temporal muscles and increase in the masseter with light balance in the third month evaluation. Wilcoxon-Mann-Whitney test between the techniques and the Friedman test in the evaluated times did not show significant statistical differences (p<0.05). The techniques clinically studied did not show differences between themselves and the times evaluation did not provide balance in the masticatory muscles studied. In this way, both techniques can be used with similar clinic performance
Mestrado
Protese Dental
Mestre em Clínica Odontológica
Adam, Razia Zulfikar. "Do complete dentures improve the quality of life of patients?" Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&.
Full textoral health-related quality of life. Objectives: The purpose of this study was to investigate the relationship between gender, age, socioeconomic status and denture satisfaction
Ricci, Weber Adad [UNESP]. "Disfunção craniomandibular em pacientes desdentados totais com alteração da dimensão vertical. -." Universidade Estadual Paulista (UNESP), 2002. http://hdl.handle.net/11449/97328.
Full textO presente estudo procurou avaliar a prevalência de sinais e sintomas de disfunção craniomandibular (D.C.M.) em 100 pacientes desdentados totais, portadores de próteses totais duplas, dos quais 58 apresentavam dimensão vertical normal (Grupo 1) e 42 dimensão vertical com alteração (Grupo 2). Os dados foram obtidos a partir de um índice anamnésico simplificado e de exame físico. Após a análise estatística, foi possível observar que: 1. em relação ao índice anamnésico utilizado, a análise estatística mostrou haver associação entre a dimensão vertical e os sintomas de D.C.M. (p=0,016); 2. quanto ao número de regiões sensíveis à palpação muscular, foi constatada uma associação estatisticamente significante com a dimensão vertical (p=0,014); 3. quando avaliados os grupos musculares isoladamente, apenas a palpação intraoral do músculo pterigóideo lateral apresentou associação estatisticamente significante com a dimensão vertical (p=0,05). Conclui-se, por meio deste estudo, que existe uma evidência de associação entre a dimensão vertical e os sinais e sintomas de D.C.M. considerando-se a metodologia empregada e a população estudada.
The present study evaluated the prevalence of signs and symptoms of temporomandibular disorders in 100 patients wearing complete upper and lower dentures, 58 with normal vertical dimension (Group 1) and 42 with altered vertical dimension (Group 2). The data were obtained utilizing a simplified anamnestic index and of physical exam. After the statistical analysis, it was possible to conclude that: 1. there was a significant correlation between the vertical dimension and the symptoms of temporomandibular disorders, when utilizing the anamnestic index (p=0,016); 2. there was a significant correlation between the vertical dimension and the number of tenderness sites during muscle palpation (p=0,014); 3. when appraised the muscular groups separately, just the tenderness to the intra-oral palpation of the lateral pterygoid muscle showed a statistically significant correlation with the vertical dimension (p=0,05). It could be concluded that there was an association between the vertical dimension and the signs and symptoms of temporomandibular disorders, for this sub population that has been analysed.
Pow, Ho-nang Edmond. "Linear dimensional change of heat-cured acrylic resin complete dentures after reline and rebase." Click to view the E-thesis via HKUTO, 1995. http://sunzi.lib.hku.hk/HKUTO/record/B38628132.
Full textPow, Ho-nang Edmond, and 鮑浩能. "Linear dimensional change of heat-cured acrylic resin complete dentures after reline and rebase." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1995. http://hub.hku.hk/bib/B38628132.
Full textCheng, Yi-Yung. "Flexural fatigue behaviour of high performance polyethylene fibre reinforced polymethylmethacrylate maxillary dentures." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B41897225.
Full textFerreira, Daniel Filgueiras. "Estudo da atividade eletromiografica e eficiencia mastigatoria e sua correlação em usuarios de proteses totais." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289916.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O objetivo desta pesquisa foi avaliar a eficiência mastigatória, a atividade eletromiográfica (EMG) e sua possível correlação em usuários de próteses totais duplas. Vinte e quatro pacientes totalmente edêntulos, livres de sinais e sintomas de Desordem Temporomandibular (DTM) com no mínimo cinco anos de uso de próteses totais, foram selecionados e separados aleatoriamente em dois grupos de 12 pacientes: (G1 e G2). Os pacientes foram reabilitados com novas próteses de acordo com os grupos. No G1, utilizou-se a técnica Convencional, onde o equilíbrio foi obtido através de contatos interferentes entre dentes artificiais. No G2, utilizou-se a técnica das Rampas Posteriores de Nóbilo, que proporcionou equilíbrio através de contatos deslizantes entre as superfícies das rampas. No terceiro mês de uso das próteses totais, os pacientes tiveram sua eficiência mastigatória avaliada através da trituração de 1,5 g de alimento teste (amendoim), em 15 e 30 ciclos mastigatórios utilizando o método de fracionamento em peneiras. Na mesma época, a atividade EMG dos músculos temporal anterior e masseter foi avaliada nas posições de repouso (R) e de contração isométrica em máxima intercuspidação (CIMI) utilizando o eletromiógrafo Myosystem I'MARC REGISTRADA' (Prosecon Ltda, Uberlândia, MG, Brasil). O sinal eletromiográfico foi condicionado através de filtro digital passa faixa e analisado em relação RMS (Root Mean Square). O teste Anova não mostrou diferenças estatísticas significantes (p<0.05) para as médias praticamente idênticas da eficiência mastigatória entre os grupos 1 e 2 com 15 ciclos mastigatórios e para a pequena diferença com 30 ciclos mastigatórios. Já, o teste de Correlação de Pearson mostrou diferenças estatísticas significantes (p<0.05) na correlação da eficiência mastigatória entre os ciclos dentro de cada grupo, a qual não foi exatamente proporcional ao número de ciclos realizados. A atividade EMG analisada pelo teste Anova não mostrou diferenças estatísticas significantes (p<0.05) entre as pequenas diferenças das médias avaliadas entre os grupos. Conclui-se que as técnicas avaliadas não influenciam na eficiência mastigatória nem na atividade EMG e que a eficiência mastigatória é proporcional ao número de ciclos mastigatórios
Abstract: The aim of this study was to evaluate the masticatory efficiency, the electromyographic (EMG) activity and their possible correlation in wearers of double complete dentures. Twenty-four totally edentulous patients, free from signs and symptoms of Temporomandibular Disorders (TMD) with at least five years use of double complete dentures, were selected and randomly separated into two groups of 12 patients: (G1 and G2). The patients were rehabilitated with new complete denture according to the groups. In G1, the Conventional technique was used, where the balance was obtained through interference contacts among artificial teeth. In G2, the Nóbilo's balancing ramps technique was used, which provided balance through sliding contacts between the surfaces of the ramps. In the third month of use of complete dentures, the patients had their masticatory efficiency evaluated through the comminution of 1.5 g of test food (peanuts), in 15 and 30 masticatory cycles using the sieving method. In the same period, the EMG activity of the anterior temporal and masseter muscles was evaluated in mandibular rest (R) and in maximal biting in the intercuspal positions (CIMI) using the Myosystem I'TRADE MARK' (Prosecon Ltda, Uberlândia, MG, Brazil). The EMG sign was conditioned through digital filter pass band and analyzed in relation to RMS (Root Mean Square). The Anova test did not show significant statistical differences (p<0.05) for the practically identical averages of the masticatory efficiency between the groups 1 and 2 with 15 masticatory cycles and for the small difference with 30 masticatory cycles. On the other hand, the Pearson Correlation test showed significant statistical differences (p<0.05) in the correlation of the masticatory efficiency among the cycles in each group, which was not exactly proportional to the number of accomplished cycles. The EMG activity analyzed by the Anova test did not show significant statistical differences (p<0.05) between the small differences of the evaluated averages between the groups. In conclusion, the evaluated techniques do not influence the masticatory efficiency nor the EMG activity and that the masticatory efficiency is proportional to the number of masticatory cycles
Doutorado
Protese Dental
Doutor em Clínica Odontológica
Santos, Mateus Bertolini Fernandes dos 1985. "Influencia de diferentes tipos de muflas na movimentação de dentes de proteses totais superiores." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288553.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piraciaba
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Resumo: O objetivo neste estudo foi verificar a influência de diferentes tipos de muflas na movimentação de dentes ocorrida em próteses totais padronizadas após o processamento laboratorial em ciclo de polimerização longo (74±2°C por 9 horas), em banho de água. A partir de matrizes em silicone, foram obtidos 31 modelos em gesso pedra tipo III de uma arcada desdentada superior e 31 de uma inferior. Sobre um modelo superior foram confeccionada base de prova e plano de orientação em cera com dimensões de 20 mm de altura na região anterior e 10 mm na região posterior. Este plano foi montado em articulador semi-ajustável, e após isso foi confeccionada base de prova e plano de cera inferior seguido pela montagem do modelo inferior no articulador. Após a realização da montagem dos dentes artificiais nos planos de cera, foi confeccionada uma matriz em silicone laboratorial para possibilitar a reprodução da montagem dos dentes. Foram então encerados 30 pares de próteses totais, distribuídos aleatoriamente em três grupos (n=10): Mufla convencional, Mufla Dupla e Mufla HH com os dentes em oclusão. Antes da inclusão pinos referenciais foram colocados em locais padronizados e as distâncias entre incisivos (I-I), pré-molares (P-P), molares (M-M), incisivo a molar do lado esquerdo (IE-ME) e incisivo a molar do lado direito (ID-MD) aferidas em microscópio óptico linear com 0,0005 mm de precisão. Após a polimerização estas distâncias foram aferidas novamente, e os dados obtidos analisados estatisticamente através dos testes t-pareado, ANOVA e Holm-Sidak, todos com 95% de confiança. Foram encontradas diferenças estatisticamente significantes entre as distâncias P-P (p=0,003 para mufla dupla; e p<0,001 para mufla HH) e M-M (p=0,006 para mufla convencional; p=0,005 para mufla dupla; e p<0,001 para mufla HH). Quando comparadas entre si, foi encontrada diferença estatisticamente significante entre pré-molares (p=0,011) sendo que a mufla convencional apresentou menor diferença entre as distâncias pré/pós-polimerização que a mufla HH (p=0,003). Todas as muflas envolvidas neste estudo apresentaram diferenças estatisticamente significantes em ao menos uma das distâncias aferidas, sendo que a mufla convencional apresentou os melhores resultados
Abstract: The aim of this study was to verify the influence of different flask types in the teeth displacement after processing standardized complete dentures in long cycle of polymerization in water bath (9 hours at 74°C). Thirty-one superior and thirty-one inferior stone casts of an edentulous arch were poured with type III stone, from a silicone matrix. One superior cast was mounted in a semi-adjustable articulator with wax rim height of 20 mm in anterior region and 10 mm in the posterior, and then the inferior cast was mounted too. After teeth wax-up, silicone matrix were made with laboratory silicone to enable the reproduction of the same wax-up pattern. The dentures were assigned randomly in 3 groups (n=10): Traditional flask, Double Flask and HH flask with teeth in occlusion. Before flasking reference pins were placed in standardized places and the distances between incisive (I-I), pre-molars (P-P), molars (M-M), left incisor to left molar (LI-LM) and right incisor to right molar (RI-RM) were measured in an optical microscope with 0.0005 mm accuracy. After polymerization, these distances were re-measured and the data obtained was statistical analyzed trough paired t-test, ANOVA and Holm-Sidak, all with 95% of confidence level. It was found statistical differences among P-P (p=0.003 for double flask; and p<0.001 for HH flask) and M-M (p=0.006 for traditional flask; p=0.005 for double flask; and p<0.001 for HH flask). When compared, it was found statistical differences among pre-molars (p=0.011) where conventional flask showed minor differences than HH flask (p=0.003). All flask types used in this study presents statistical differences in at least one of the measured distances, being that traditional flask showed better results
Mestrado
Protese Dental
Mestre em Clínica Odontológica
Ricci, Weber Adad. "Disfunção craniomandibular em pacientes desdentados totais com alteração da dimensão vertical. -." Araraquara : [s.n.], 2002. http://hdl.handle.net/11449/97328.
Full textBanca: João Neudenir Arioli Filho
Banca: Helena de Freitas Oliveira Paranhos
Resumo: O presente estudo procurou avaliar a prevalência de sinais e sintomas de disfunção craniomandibular (D.C.M.) em 100 pacientes desdentados totais, portadores de próteses totais duplas, dos quais 58 apresentavam dimensão vertical normal (Grupo 1) e 42 dimensão vertical com alteração (Grupo 2). Os dados foram obtidos a partir de um índice anamnésico simplificado e de exame físico. Após a análise estatística, foi possível observar que: 1. em relação ao índice anamnésico utilizado, a análise estatística mostrou haver associação entre a dimensão vertical e os sintomas de D.C.M. (p=0,016); 2. quanto ao número de regiões sensíveis à palpação muscular, foi constatada uma associação estatisticamente significante com a dimensão vertical (p=0,014); 3. quando avaliados os grupos musculares isoladamente, apenas a palpação intraoral do músculo pterigóideo lateral apresentou associação estatisticamente significante com a dimensão vertical (p=0,05). Conclui-se, por meio deste estudo, que existe uma evidência de associação entre a dimensão vertical e os sinais e sintomas de D.C.M. considerando-se a metodologia empregada e a população estudada.
Abstract: The present study evaluated the prevalence of signs and symptoms of temporomandibular disorders in 100 patients wearing complete upper and lower dentures, 58 with normal vertical dimension (Group 1) and 42 with altered vertical dimension (Group 2). The data were obtained utilizing a simplified anamnestic index and of physical exam. After the statistical analysis, it was possible to conclude that: 1. there was a significant correlation between the vertical dimension and the symptoms of temporomandibular disorders, when utilizing the anamnestic index (p=0,016); 2. there was a significant correlation between the vertical dimension and the number of tenderness sites during muscle palpation (p=0,014); 3. when appraised the muscular groups separately, just the tenderness to the intra-oral palpation of the lateral pterygoid muscle showed a statistically significant correlation with the vertical dimension (p=0,05). It could be concluded that there was an association between the vertical dimension and the signs and symptoms of temporomandibular disorders, for this sub population that has been analysed.
Mestre
Cheng, Yi-Yung, and 鄭而容. "Flexural fatigue behaviour of high performance polyethylene fibre reinforced polymethylmethacrylate maxillary dentures." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B41897225.
Full textMpungose, Sandile Khayalethu Derrick. "Complete denture occlusion: intra and inter observer analysis." Thesis, University of Western Cape, 2014. http://hdl.handle.net/11394/3352.
Full textAim: The aim of this study was to investigate the accuracy, intra- and inter-observer reliability of identifying occlusal markings made by articulating paper on complete dentures intra-orally. Methods: A series of photographs of 14 tissue borne complete dentures with occlusal markings was obtained. Articulating paper was used intra-orally at the delivery visit to make the occlusal markings. The denture sets were divided into two groups. Group 1 comprised pictures of the 14 complete lower dentures on their own, and group 2 comprised pictures of the same 14 lower dentures together with their opposing upper denture. The two groups of images were loaded into a Microsoft PowerPoint presentation as well as Keynote. Two experienced observers analysed the complete dentures independently and noted the number and distribution of the markings that they felt required adjustment. They differed, but discussed these and reached consensus. These data served as the control. Three groups of observers (10 per group) were then asked to analyse the occlusal markings of the 2 groups of denture images twice, with a two-week interval between each assessment. Before each subsequent assessment, the images were randomised by means of computer-generated random number sequence. The mean number of markings was established for each group and compared with the control mean. Intra-rater reliability was established by comparing the difference of the means of sequential observations for each rater by establishing the z-value. Inter-rater reliability within each group was established by means of analysis of variance. Results: Considering all the data, in only 17 instances (of the possible 60), did observers’ mean scores not differ from the control mean scores with good intra-rater reliability. In all other 43 instances the observers’ mean scores differed from the control mean scores and/or displayed poor intra-rater reliability. Considerable variation in inter-rater reliability was also found within every group of observers. Conclusion: The results indicate that observers are generally unable to reliably identify occlusal markings warranting occlusal adjustment, made by articulating paper on a lower complete denture. Clinical significance: Articulating paper should not be used intra-orally when delivering removable complete dentures.
Fenlon, Michael Robert. "An analysis of factors influencing outcome in relation to complete dentures made at a dental teaching hospital." Thesis, King's College London (University of London), 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266026.
Full textCosta, Carolina Bacci [UNESP]. "Avaliação da proporção áurea em radiografias cefalométricas laterais de indivíduos edêntulos antes e depois do tratamento por próteses totais." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/98011.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O propósito neste estudo foi avaliar razões para verificação da proporção áurea entre estruturas ósseas do crânio e face de indivíduos edêntulos, antes e depois do tratamento por próteses totais. Foram utilizadas 60 radiografias cefalométricas laterais de 30 indivíduos desdentados totais bimaxilares, tratados na Disciplina de Prótese Total da Faculdade de Odontologia de São José dos Campos - UNESP. A técnica radiográfica foi realizada em um único aparelho, pelo mesmo operador, sendo: a primeira radiografia sem as próteses em posição de repouso fisiológico e a segunda com as próteses totais em oclusão cêntrica. As radiografias foram digitalizadas e com o auxílio do programa de computador Radiocef Studio 2 (Radiomemory, Belo Horizonte, Brasil), foi possível criar uma nova análise cefalométrica para a marcação dos pontos cefalométricos e obtenção dos fatores envolvidos nas razões avaliadas. A marcação dos pontos foi realizada em dois tempos, num intervalo de 30 dias, a fim de avaliar o erro intra-examinador. Após análise estatística por meio do teste t de Student e t pareado, comparando-as ao número áureo 1,618, as razões Or-Me/Co-Go, Pog- Op/Or-Me e Pog-Op/Enp-Op não diferiram estatisticamente antes e depois do tratamento protético. As razões Or-Me/Ena-Enp, Or-Me/N-Ena, Or-Me/Op-N e NMe/ Ena-Me diferiram estatisticamente, sendo a última de forma favorável, ou seja, aproximou-se ao número áureo após o tratamento por próteses totais.
The aim of this study was to evaluate ratios in edentulous subjects, between bone structures of the skull and face, before and after prosthetic treatment with complete dentures. Sixty cefalometric x-rays from 30 edentulous subjects were used and all the complete dentures were made by School of Dentistry`s students, from São Paulo State University. The radiographs were taken by only one examiner, in the same x-ray unit. The radiographs were: the first without the complete dentures, in mandibular rest position, and the second, in centric occlusion. The analysis cephalometrics were performed using the software Radiocef Studio 2 (Radiomemory, Brazil). In order to evaluate error intraexaminer, the cephalometric points were marked in two times in each radiograph. The means of each ratio were statistically analysed by paired t-test and Student`s t-test, and compared with the golden number 1,618. There were no statistically significant in ratios Or-Me/Co-Go, Pog-Op/Or-Me and Pog- Op/Enp-Op, before and after prosthetic treatment. The ratios Or-Me/Ena- Enp, Or-Me/N-Ena, Or-Me/Op-N and N-Me/Ena-Me were different statistically. The ratio N-Me/Ena-Me was closer than the golden number, after prosthetic treatment with complete dentures.
Mendoza, Marin Danny Omar [UNESP]. "Influência da utilização de um adesivo para prótese na satisfação e nos parâmetros cinesiográficos de usuários de próteses totais." Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/97330.
Full textObjetivo: O objetivo deste estudo foi avaliar o efeito da utilização de um adesivo para prótese na satisfação e nos parâmetros cinesiográficos em usuários de próteses totais por meio de um estudo “cross-over”. Material e Métodos: Cinquenta pacientes desdentados receberam novas próteses totais bimaxilares. Após um período de adaptação, os participantes incluídos no estudo receberam uma sequência de tratamento: protocolo 1- utilização do adesivo para prótese durante os primeiros 15 dias, seguida por não utilização do adesivo os próximos 15 dias; protocolo 2- não utilização do adesivo durante os primeiros 15 dias; seguida por utilização do adesivo os próximos 15 dias. Os resultados foram avaliados após 15 dias de cada sequência de tratamento. Um questionário para avaliar a satisfação dos pacientes e um cinesiógrafo para registrar os movimentos mandibulares e o padrão de movimento da prótese total maxilar durante mastigação foram utilizados. O teste de “Wilcoxon” (α=0,05) e o “t-test” de student para amostras pareadas (α=0,05) foram utilizados para comparar o grau de satisfação dos pacientes e os dados cinesiográficos, respectivamente. Resultados: O adesivo para prótese melhorou significativamente a satisfação geral dos participantes (p<0,001). Os registros cinesiográficos mostraram um aumento significativo (1,7mm) no movimento mandibular vertical (p<0,001) e uma menor intrusão (0,3mm) da prótese total superior (p=0,002) durante a mastigação após o uso de adesivo. Conclusão: O uso de adesivo para prótese melhorou a satisfação dos usuários de próteses totais e gerou um aumento no movimento mandibular vertical e uma menor intrusão da prótese total maxilar durante a mastigação
Objectives: The objective of this study was to evaluate the effect of a denture adhesive (DA) on patient satisfaction and kinesiographic parameters of complete denture wearers by a cross-over study. Material and Methods: Fifty edentulous patients received one set of new complete dentures. After an adaptation period, the participants were enrolled in the trial and randomized to receive a sequence of treatment: protocol 1- DA use during the first 15 days, followed by the no use of DA over the next 15 days; protocol 2- no use of DA during the first 15 days, followed by use of DA over the next 15 days. Outcomes were assessed after 15 days of each sequence of treatment. A questionnaire was used to evaluate patients´ satisfaction and a kinesiograph instrument was used to record mandible movements and pattern of maxillary complete denture movement during chewing. Wilcoxon test (α=.05) and a paired sample t-test (α=.05) were used to compare satisfaction levels and kinesiographic data, respectively. Results: The use of DA improved the overall patients´ satisfaction (p<.001). Kinesiographic recordings revealed a significant increase (1.7mm) on vertical mandible movements (p<0,001) during chewing and a lower (.3mm) vertical intrusion of the maxillary complete denture (p=0,002) during chewing after use of DA. Conclusion: The use of a DA in complete dentures wearers improved the patients´ satisfaction and change mandible movements, with increases in vertical mandible movements during chewing and lower intrusion of maxillary complete denture
Silva, Mariana Montenegro. "Efetividade da irradiação por microondas na desinfecção de próteses totais /." Araraquara : [s.n.], 2005. http://hdl.handle.net/11449/97316.
Full textAbstract: The aim of this study was to evaluate the effectiveness of microwave irradiation on the sterilization of complete dentures contaminated with individual suspension of 3 bacterias (P. aeruginosa, S. aureus and B. subtilis) and one fungus (C. albicans). Eighty simulated maxillary complete dentures were fabricated in a standardized procedure and subjected to ethylene oxide sterilization. The dentures were individually inoculated (107 cfu/mL) with Tryptic Soy Broth (TSB) media containing one of the tested microorganisms. After incubation at 37°C for 48 hours, forty dentures were immersed in 200 mL of distilled water and submitted to microwave irradiation at 650 W for 6 minutes. Forty non - irradiated dentures were used as positive controls. Using 0.9% sodium chlorine solution as diluent, tenfold serial dilutions 10-1 - 10-6 were plated onto 4 selective media appropriate for each organism: Manitol Salt Agar for S. aureus, Miller Hinton for P. aeruginosa, Sabourand Agar containing 5 μg/mL gentamicin for C.albicans, and Tryptic Soy Agar for B. subtilis. All plates were incubated at 37°C for 48 hours and colonies counts of each plate were quantified (cfu/mL). To verify the long - term effectiveness ofmicrowave sterilization, the TSB beakers with the microwave specimens were incubated at 37°C for 7 days. Data were statistically analyzed by Kruskal - Wallis's test (α=0.05). Irradiated dentures showed consistent sterilization of S. aureus, B. subtilis and C. albicans after 48 hours. Compared to P. aeruginosa control, a very low number of colonies were detected only in two plates. Turbidity was observed in three broth beakers, two from P. aeruginosa and one from B. subtilis, after 7 days incubation at 37°C. All control dentures showed microbial...(Complete abstract, click electronic access below)
Orientador: Carlos Eduardo Vergani
Coorientador: Denise Madalena Palomari Spolidorio
Banca: Ana Cláudia Pavarina
Banca: Dalva Cruz Laganá
Mestre
Al-Makki, Amjad. "A comparative study to evaluate patient satisfaction with conventional dentures and implant retained overdentures." Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3748_1204268777.
Full textThe edentulous jaw is a common feature in elderly patients that had lost their teeth during life due to local reasons such as poor oral hygiene and dental caries as well as periodontal disease. Hence these patients are the victims of biological phenomenona that lead to difficulties in different aspects of patient comfort with dentures. Clinicians are always concerned to minimize these difficulties and increase patient comfort through manufacturing a proper prosthesis to substitute for the loss of the natural teeth as well as the surrounding structures for optimum satisfaction and improved quality of life of the patient. The aim of this study was to evaluate patient satisfaction regarding function and aesthetics with conventional mandibular dentures and implant retained mandibular overdentures in denture wearers.
Sorgini, Danilo Balero. "Avaliação da perda de massa e alteração da rugosidade superficial causada pela associação dos métodos mecânico (escovação) e químico (imersão) de higiene de próteses totais." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-30112011-145659/.
Full textThe aim of this study was evaluate the weight loss and changes in surface roughness when mechanical and chemical methods of denture cleanser were associated. Seventy-two Plexiglass specimens (90x30x3 mm) were used. The brushing test was carried out using a toothbrushing machine (Mavtec), with a frequency of 356 rpm, course covered by brush corresponds to 3.8 cm, the load was standardized at 200 g, and length of 50 minutes (01 year of brushing). Like suspension, were utilized distilled water and 04 dentifrices (02 conventional: Sorriso and Colgate; and 02 indicated for denture cleanser: Polident and Corega). After brushing, the specimens were immersed in sodium hypochlorite (NaClO) 0,5% for 121,6 hours (01 year of immersion). Six groups were obtained, 01 control (C - brushing and immersion with water) and 05 experimental (Ex1: water; Ex2: Sorriso; Ex3: Colgate; Ex4: Polident; Ex5: Corega- all immersed in NaClO). The specimens were weighed before the tests (M1), after the brushing test (M2) and after the immersion test (M3) in a precision balance (Metler Toledo GMbH). The surface roughness (m) was evaluated by rugosimeter (Surftest SJ-201P) before the tests (R1), after the brushing test (R2) and after the immersion test (R3). The weight loss and roughness dates were subjected to ANOVA and Bonferroni tests (p < 0.05). After the brushing test, between the dentifrices, the greater values was registered for Ex2 (-0,0137±0,0085), Ex3 (-0,0123±0,0038) e Ex5 (-0,0121±0,0032), and the lowest for Ex4 (-0,0072±0,0017); after the association of the two methods, the grater values was obtained for Ex2 (-0,0184±0,0040) e Ex3 (-0,0155±0,0034), and the lowest for Ex4 (- 0,0108±0,0023); the association of the methods resulted in greater weight loss than the mechanical method, except for Ex5. For the surface roughness, after the mechanical test, the lowest values were registered for Ex1 (-0,007±0,016) and Ex4 (0,402±0,378), and the grater for the others; after the association of the methods, the greater values were obtained for Ex2 (1,617±1,190) and Ex5 (1,634±1,082), and the lowest for Ex1 (-0,063±0,013); there was no difference for the treatments. We conclude that: 1. Brushing with toothpaste resulted in greater weight loss and change in roughness that brushing with water. 2. The immersion in NaClO 0.5% associated with tooth brushing caused greater weight loss and change of roughness, when compared to immersion in water. 3. The toothpaste Polident (specific) had the lowest mass loss and surface roughness for both methods (mechanical and combined) 4. The association of the two methods resulted in no change in surface roughness, but in greater weight loss than the mechanical method, except for the Corega (specific).
Ahuja, Swati. "Immediate effect of complete denture occlusal errors on masticatory muscle EMG activity in denture wearers a pilot study /." View the abstract Download the full-text PDF version, 2009. http://etd.utmem.edu/ABSTRACTS/2009-011-Ahuja-index.htm.
Full textTitle from title page screen (viewed on July 23, 2009). Research advisor: Robert Brandt Document formatted into pages (vii, 42 p. : ill.). Vita. Abstract. Includes bibliographical references (p. 37-39).
Castro, Eni Vaz Franco Lima de [UNESP]. "Estudo clínico e histopatológico da mucosa palatina em pacientes não usuários de prótese e em usuários de prótese com câmara de sucção." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/102336.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Considerando-se a significativa importância do melhor conhecimento acerca das lesões de maior ocorrência no cotidiano do cirurgião-dentista, justifica-se o estudo das hiperplasias fibrosas inflamatórias em geral, especialmente aquelas de inter-relacionamento com a atuação direta do profissional, como as hiperplasias protéticas. No presente estudo, foram observados os aspectos clínicos e microscópicos da mucosa palatina em pacientes não usuários e usuários de prótese, com a finalidade de se identificar a possibilidade de direta relação entre lesão e suposto agente causal. No sentido de se tentar realizar um estudo mais abrangente e com resultados mais confiáveis, o presente trabalho foi desenvolvido em dois capítulos distintos, analisando-se inicialmente a mucosa palatina clinicamente normal de trinta pacientes usuários e não usuários de prótese total superior, observando-se que a presença de hiperplasia no epitélio de revestimento da mucosa palatina é um achado constante, tanto em usuários como em não usuários de prótese, sendo que a ausência de alterações clínicas nem sempre reflete a mesma normalidade ao exame histopatológico, sem uma relação de dependência entre inflamação e presença de hiperplasia epitelial e vice versa, em ambos os grupos. No segundo capítulo, foram estudados vinte e três pacientes com hiperplasia fibrosa palatina por câmara de sucção, antes e após tratamento compressivo, observando-se que lesões hiperplásicas podem não apresentar um quadro inflamatório crônico, sugerindo que o preenchimento gradativo da área de câmara de sucção é uma opção terapêutica de valor para esses casos.
Being considered the significant importance of the best knowledge concerning the lesions of larger occurrence in the routine of Surgeon Dentist, it is justified the study of the inflammatory fibrous hyperplasias in general, especially those of inter-relationship with the professional's direct performance, as the prosthetic hyperplasias. In the present study, the clinical and microscopic aspects of the palatine mucous membrane were observed in patients wearing or not total prosthesis, with the purpose of identifying the possibility of direct relationship between lesion and supposed causal agent. As an examining to try to accomplish a broader study with more reliable results, the present work was developed in two different chapters, being analyzed the clinically normal palatine mucous membrane of thirty patients initially wearing and not wearing of upper complete denture, being observed that the presence of hyperplasia in the epithelium coating of palatine mucous membrane is a constant discovery, as in wearing as in not prosthesis wearing individuals, and the absence of clinical alterations not always it reflects the same normality to the histopathologic exam, without a dependence relationship between inflammation and presence of epithelial hyperplasia and vice-versa, so much in wearing as in not prosthesis wearing. In the second chapter, twenty-three patients with palatine fibrous hyperplasia for suction chamber were studied, before and after treatment by use of tissue conditioning. It was observed that hyperplasic lesions cannot present a chronic inflammatory picture, suggesting that the gradual completion of the area of suction chamber is an important therapeutic option for those cases.
Macêdo, Ana Patrícia Fernandes de. "Efeito da desinfecção por microondas em biofilmes de Candida sp. formados em resinas acrílicas." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288564.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O objetivo neste estudo in vitro foi avaliar o efeito da desinfecção por microondas em biofilmes de Candida sp formados em resinas acrílicas Clássico, Onda-Cryl e QC-20. Para isso foram confeccionados 30 corpos-de-prova (20mm de diâmetro por 2mm de altura), de cada resina, esterilizados com óxido de etileno. Após a obtenção do inóculo da levedura (Candida albicans, Candida tropicalis e Candida dubliniensis), os corpos-de-prova foram contaminados individualmente com 200 ?L de uma cultura ajustada a 108 unidades formadoras de colônias (UFC/mL). Os espécimes foram colocados em meio de cultura específicos e incubados por 24 horas a 37ºC em aerobiose para a formação do biofilme. Para cada resina e cada microorganismo avaliados, 03 corpos-de-prova foram irradiados por microondas com potência de 650 W durante 3 minutos, 01 corpo-de-prova controle não foi irradiado e outro corpo-de-prova controle sem microorganismos. Após esse processo, os corpos-de-prova foram lavados em solução salina e plaqueados em meio de cultura (Sabouraud dextrose Ágar) para análise do número de UFC/mL. Para análise estatística foi empregado o método de Kruskal-Wallis, seguido pelo teste de Student-Newman-Keuls. O grupo controle (não irradiados) apresentou crescimento microbiano após 48 horas de incubação a 37ºC. O grupo experimental apresentou diminuição significativa no número de colônias viáveis para todos os biofilmes formados pelas espécies de Candida analisadas. Os resultados demonstraram efetiva esterilização do biofilme de Candida após irradiação a 650 W por 3 minutos, para a maioria dos corpos-de-prova. O procedimento demonstrou ser um método capaz de diminuir consideravelmente a quantidade destes microrganismos
Abstract: The objective of this in vitro study was to evaluate the effect of microwave disinfection in biofilms of Candida sp. immersed in acrylic resin specimens (Clássico, Onda-Cryl and QC-20). For the study, 30 specimens (20mm X 2mm) were fabricated, for each resin, and subjected to ethylene oxide sterilization. After obtaining the inoculum of yeast (Candida albicans, Candida tropicalis and Candida dubliniensis), the specimens were infected individually with 200?L of a culture adjusted to 108 CFU / mL, placed in specific media and incubated for 24 hours to 37ºC aerobically for biofilm formation. For each resin and microorganism, 03 specimens were irradiated by microwave for 3 minutes at 650 W, and a control non-irradiated and a control without microorganisms. After this process, the specimens were washed with saline and then plated in Sabouraud dextrose agar for analysis of the number of colony forming units (CFU / mL). For statistical analysis was used the method of Kruskal-Wallis test followed by Student-Newman-Keuls. The control group (not irradiated) showed microbial growth after 48 hours incubation at 37ºC. The experimental group showed a significant decrease in the number of viable colonies for all the biofilms formed by Candida species analyzed. Thus, the results demonstrated an effective sterilization of Candida biofilm after 3 minutes of irradiation at 650W for most of the specimens. The procedure proved to be able to significantly decrease the amount of microorganisms
Mestrado
Protese Dental
Mestre em Clínica Odontológica
Pimentel, Marcele Jardim 1984. "Biomechanical evaluation of short implante to support complete denture in atrophic mandible : Avaliação biomecânica de implantes curtos para suporte de próteses totais fixas em mandíbulas atróficas." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287979.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: Este estudo teve como objetivo avaliar o comportamento biomecânico de implantes curtos para suporte de próteses totais fixas em mandíbulas atróficas, assim como avaliar a influência da proporção prótese-implante neste comportamento. Para isto, foi conduzido um estudo "in vitro" com a aplicação do método de Fotoelasticidade e "in silico", com auxílio dos softwares SolidWorks Premium 2013® e Ansys Workbench 14.0®, para aplicação do método de Elementos Finitos. Os grupos foram divididos de acordo com as características dos implantes quanto ao comprimento (11,0; 9,0; 7,0 e 5,0 mm) e diâmetro (Ci = conventional 4,0 mm ou Wi = wide 5,0 mm) sendo: Ci9 (9,0x4,0 mm), Ci7 (7,0x4,0 mm), Ci5 (5,0x4,0 mm), Wi9 (9,0x5,0 mm), Wi7 (7,0x5,0 mm) e Wi5 (5,0x5,0 mm) comparados ao grupo controle (CG 11,0x4,0 mm). A influência da proporção prótese-implante foi analisada em quatro proporções: 1,2:1; 1,7:1; 2,5:1 e 4,0:1. Foram confeccionados modelos representativos da secção anterior da mandíbula, nos quais foram posicionados quatro implantes de interface cone Morse e componentes protéticos (pilar, barra, parafuso de retenção e prótese total - quando aplicável). A extensão do cantilever foi igual para todos os grupos, em ambos os experimentos, determinada em 15mm e na extremidade distal foram realizados os carregamentos. Como variável resposta para análise da distribuição de tensão no estudo "in vitro" foi obtida a tensão cisalhante em 5 pontos em torno do implante distal (lado de carregamento) e implante subsequente, obtida no software Fringes® (carregamento de 0,15 kgf). Já para análise "in silico" os valores máximos de tensão para cada corpo avaliado foram obtidos com auxílio do software Ansys Workbench® (carregamento de 100 N). Foram obtidos os valores de tensão Máxima Principal para osso e tensão de von Mises para implantes e componentes protéticos. Os resultados demonstram que há maior transmissão de forças para região peri-implantar quando implantes de menor área são utilizados. Implantes de 5mm de comprimento mostraram comportamento biomecânico diferente dos demais grupos, com maior níveis de tensão para osso e implantes. O aumento do diâmetro do implantes reduz a concentração de tensão sobre o tecido ósseo, aumentando os níveis de tensão sobre os componentes protéticos. Implantes curtos são responsáveis pelo aumento de tensão nos parafusos de retenção. A proporção prótese-implante aumentada favorece a concentração de tensão no osso cortical, especialmente para proporção extrema de P:I - 4:1 (20:5 mm). Podemos concluir que apesar do aumento de tensão em torno dos implantes e parafusos protéticos implantes curtos representam uma opção para reabilitação de mandíbulas atróficas afim de eliminar procedimentos de enxerto, especialmente quando associados a implantes de largo diâmetro, com ressalva para implantes de 5 mm e proporções P:I extremas
Abstract: The aim of this study was to evaluate the biomechanical behavior of short implants to support fixed prostheses in atrophic mandible, and assess the influence of prosthesis-implant ratio in this behavior. For this, an "in vitro " study by photoelasticity method, and an "in silico" test, with the aid of software SolidWorks Premium 2013® and Ansys Workbench ® 14.0 for Finite Element Analysis, were conducted. The groups were divided according to the length (11.0, 9.0, 7.0 e 5.0mm) and diameter of the implants (conventional - Ci with 4.0 mm or wide - Wi with 5.0 mm) the groups division was: Ci9 (9.0x4.0mm), Ci7 (7.0x4.0mm ), Ci5 (5.0x4.0mm ), Wi9 (9.0x5.0mm ), Wi7 (7.0x5.0mm ) and Wi5 (5.0x5.0mm ) that was compared to CG (11.0x4.0mm). The influence of prosthesis-implant ratio was analyzed at four levels: 1.2:1; 1.7:1; 2.5:1 and 4.0:1. The models are made representing the anterior section of the mandible, with four cone Morse tape implants and prosthetic components (abutment, bar, retaining screw and dentures - when applicable). The cantilever extension (15mm) was equal for all groups, in both experiments. The load was applied at the end of the cantilever. For the "in vitro" study the shear stress was obtained in 5 peri-implant points around the distal (load side) and the subsequent implant using Fringes® software (load of 0.15 kgf). For the " in silico " test the Maximum Principal Stress was obtained for bone and von Mises stress for implants and prosthetic components using the Ansys Workbench® software (load 100N). The results showed that there is a greater transmission of stress to peri-implant area when smaller implants are used. Implants 5mm long showed different biomechanical behavior when compared to other groups, with higher levels of stress to the bone and implants. Implants with larger diameter decrease the stress in the bone tissue, increasing levels of stress on the prosthetic components. Short implants are responsible for the increase of the stress values in retention screws. The prosthesis-implant ratio favors the increase of stress concentration in the cortical bone, especially for extreme prosthesis-implant ratio (4:1/20:5 mm). Was conclude that despite the increased tension around the implants and prosthetic screws short implants represent an option for rehabilitation of atrophic jaws in order to eliminate grafting procedures, especially when associated with large-diameter implants, except for 5mm implants associated to extreme P:I ratio
Doutorado
Protese Dental
Doutora em Clínica Odontológica
Monteiro, Wildes da Costa. "Avaliação das alterações dimensionais em modelos de gesso para protese total por meio de medição tridimensional em função de materiais e tecnicas de moldagem." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290120.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O objetivo deste estudo foi analisar por meio de medições tridimensionais, as alterações dimensionais que ocorrem nos modelos de gesso utilizados na confecção de prótese total, em função de diferentes materiais para moldagem: silicone, alginato e godiva equalizada com alginato. Foram confeccionados 45 modelos de gesso tipo IV, (n=15) construídos a partir de moldes obtidos de um modelo padrão metálico de alumínio, onde foram colocados 7 parafusos com 3,5 mm de diâmetro, para estabelecer pontos referenciais das distâncias a serem mensuradas. Esses pontos referenciais permitiram criar segmentos para o cálculo do volume e da área gerados nas figuras representativas dos modelos de gesso, permitindo avaliar a estabilidade dimensional dos modelos em gesso por meio de medições tridimensionais. No CETEF os modelos de gesso foram submetidos às medições tridimensionais no aparelho Mitutoyo, modelo BLN 710, equipado com cabeça de medição Renishaw PH9 e apalpador TP200 com esfera de 1mm de diâmetro, para as seguintes etapas: 1- transferência das coordenadas tridimensionais para o programa Mechanical Desktop; realização dos desenhos bidimensionais; medição dos seguimentos que compõem cada figura desenhada de cada desenho; realização dos desenhos tridimensionais; cálculo do volume e da área projetada utilizando a malha de elementos finitos e confecção de uma planilha de cálculo para cada material de moldagem; tratamento estatístico dos dados e determinação matemática das variações e das coordenadas x, y e z dos comprimentos de cada um dos segmentos, dos perímetros e das áreas de cada figura dos quarenta e cinco modelos. 2- lançamento dos dados nas planilhas de cálculo; tratamento estatístico dos dados e determinação matemática das variações e das coordenadas x, y e z dos comprimentos de cada um dos segmentos, dos perímetros e das áreas de cada figura. 3- apresentação tridimensional das variações dimensionais encontradas nos modelos; transferência das variações das coordenadas do grupo de modelos de cada material, em relação ao modelo padrão, para o software de desenho 3D ¿ Mechanical Desktop; geração das figuras para visualização das variações e elaboração de relatório técnico. Os resultados foram submetidos à média matemática simples da dispersão ou variação dos dados, que é o grau no qual os dados numéricos da amostra tendem a dispersar-se em torno de um valor médio. Foi utilizado neste trabalho o cálculo do desvio padrão simples. Os moldes feitos com silicone por adição produziram modelos com menor variação dimensional (capacidade de repetitibilidade) quando comparados aos modelos obtidos com moldes de alginato e godiva equalizada com alginato. O alginato produziu modelos com grande fidelidade de cópias em função da matriz metálica
Abstract: The purpose of this study was to analyze, through three-dimensional measurements, the dimensional changes in casts of stone used to make complete dentures, in function of different materials for impression: addition reaction silicone, alginate and impression compound reline with alginate. The casts of stone type IV were made from molds obtained from a metallic standard die of aluminum. In this metallic die were put seven screws with 3,5mm diameter, to establish referential points of the measured distances. The referential points allowed creating segments for the calculation of the area and volume in the representative drawings generated for the stone casts. The procedure allows evaluating the dimensional stability through three-dimensional measurements. In CETEF the stone die were measured with three-dimensional equipment Mitutoyo, model BLN 710, equipped with measurement head Renishaw PH9 and feeler TP200 with sphere of 1mm of diameter, for the stages: 1- Transfer of the three-dimensional coordinates for the program Mechanical Desktop; generation of the two-dimensional drawings; measurement of the segments that compose each drawing; generation of the three-dimensional drawings; projected area determination and volume calculation using the finite elements net; making of a calculation spread sheet for each impression material; statistical treatment of the data and mathematical determination of the variations in the x, y and z coordinates in the lengths of each segments, in the perimeters and in the areas of each drawing of the forty five casts. 2 - Insertion of the data in the calculation spread sheets; statistical treatment of the data and mathematical determination of the variations and in the x, y and z coordinates in the lengths of each one of the segments, in the perimeters and of the areas of each drawing. 3 - Three-dimensional presentation of the dimensional variations found in the models; transfer of the variations of the coordinates of the group of models of each material, for the software of 3D drawing ¿ Mechanical Desktop; generation of the drawings for visualization of the variations and elaboration of technical report. The results were submitted to the simple mathematics medium of the dispersion or variation of the data, that it is the degree, in which the numeric data of the sample tend to disperse around a medium value. It was used in this work the calculation of the simple standard deviation. The molds made with addition reaction silicone produced casts with smaller dimensional variation, when compared to the casts obtained with alginate or impression compound reline with alginate. The silicone presented larger capacity to repeat generated copies of the molds, from the standard die. The cast made with addition reaction silicone presented small variation among themselves when compared to the standard metallic die
Doutorado
Protese Dental
Doutor em Clínica Odontológica
Silva, Mariana Montenegro [UNESP]. "Efetividade da irradiação por microondas na desinfecção de próteses totais." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/97316.
Full textEste estudo teve por objetivo avaliar a efetividade da irradiação por microondas na esterilização de próteses totais. Para isso, oitenta próteses totais padronizadas foram confeccionadas e submetidas à esterilização com óxido de etileno. As próteses foram então individualmente inoculadas (107 ufc/mL) com meio de cultura de Tryptic Soy Broth (TSB) contendo um dos seguintes microrganismos: C.albicans, S. aureus, B. subtilis e P. aeruginosa. Após 48 horas de incubação a 37oC, 40 amostras foram imersas em 200 mL de água e irradiadas a 650 W por 6 minutos. Quarenta amostras não irradiadas foram utilizadas como controle. A seguir, 25 uL da suspensão resultante das diluições seriadas de 10-1 a 10-6, foram semeados em placas de Petri contendo os meios de cultura seletivos para cada microrganismo. Todas as placas foram incubadas a 37oC por 48 horas. Após a incubação, as colônias foram quantificadas em ufc/mL. Para verificação da efetividade exposição às microondas em longo prazo as amostras irradiadas foram imersas em meio de cultura e incubadas a 37oC por 7 dias. A esterilização foi obtida, após 48 horas, para as próteses contaminadas com C.albicans, S. aureus e B. subtilis. Um pequeno número de colônias foi observado em 2 placas de Petri para o microrganismo P. aeruginosa. Após 7 dias de incubação a 37oC houve crescimento microbiológico em 3 culturas de TSB, sendo 2 para P. aeruginosa e um para B. subtilis. Todas as próteses totais do grupo controle apresentaram crescimento microbiano nas placas de Petri, após 48 horas de incubação a 37oC. A irradiação por microondas por 6 minutos a 650 W provou ser um método rápido e efetivo para desinfecção das próteses totais contaminadas com P. aeruginosa e B. subtilis além, de promover a esterilização das inoculadas com C. albicans e S. aureus.
The aim of this study was to evaluate the effectiveness of microwave irradiation on the sterilization of complete dentures contaminated with individual suspension of 3 bacterias (P. aeruginosa, S. aureus and B. subtilis) and one fungus (C. albicans). Eighty simulated maxillary complete dentures were fabricated in a standardized procedure and subjected to ethylene oxide sterilization. The dentures were individually inoculated (107 cfu/mL) with Tryptic Soy Broth (TSB) media containing one of the tested microorganisms. After incubation at 37°C for 48 hours, forty dentures were immersed in 200 mL of distilled water and submitted to microwave irradiation at 650 W for 6 minutes. Forty non – irradiated dentures were used as positive controls. Using 0.9% sodium chlorine solution as diluent, tenfold serial dilutions 10-1 – 10-6 were plated onto 4 selective media appropriate for each organism: Manitol Salt Agar for S. aureus, Miller Hinton for P. aeruginosa, Sabourand Agar containing 5 μg/mL gentamicin for C.albicans, and Tryptic Soy Agar for B. subtilis. All plates were incubated at 37°C for 48 hours and colonies counts of each plate were quantified (cfu/mL). To verify the long - term effectiveness ofmicrowave sterilization, the TSB beakers with the microwave specimens were incubated at 37°C for 7 days. Data were statistically analyzed by Kruskal – Wallis’s test (α=0.05). Irradiated dentures showed consistent sterilization of S. aureus, B. subtilis and C. albicans after 48 hours. Compared to P. aeruginosa control, a very low number of colonies were detected only in two plates. Turbidity was observed in three broth beakers, two from P. aeruginosa and one from B. subtilis, after 7 days incubation at 37°C. All control dentures showed microbial...(Complete abstract, click electronic access below)
Senna, Plinio Mendes 1984. "Influência da extensão da área colonizada por biofilme de Candida albicans na efetividade da desinfecção de próteses por energia de micro-ondas." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288112.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: A candidose oral é a infecção fúngica mais comum diagnosticada em humanos. Em indivíduos com sistema imunológico comprometido, pode disseminar-se sistemicamente causando um quadro denominado de candidemia, o qual está relacionado com alta mortalidade e aumento do tempo de permanência hospitalar. A candidose é frequentemente associada ao uso de próteses removíveis, apresentando-se como uma inflamação da região recoberta da mucosa, o que demanda a necessidade de controle microbiológico no biofilme patogênico acumulado na prótese para prevenção da candidose oral. Assim, o objetivo deste estudo foi verificar se a extensão da área da prótese removível colonizada com biofilme de Candida albicans influencia o processo de esterilização por energia de micro-ondas. Cento e vinte próteses totais superiores estéreis tiveram áreas distintas de 2,35cm2 ou 5,50cm2 colonizados com biofilme de Cândida albicans de 72 horas. Cada prótese foi imersa em 200 mL de água destilada estéril e irradiada com potências de 450, 630 ou 900 W por diferentes tempos (1,2 e 3 min) até que não fosse detectada a presença de células fúngicas viáveis (n=6). Também a temperatura final da água foi aferida imediatamente após a irradiação para verificar sua influência neste processo. Os resultados apresentaram diferença estatística significante para a extensão da área colonizada (p<0,001), sendo que a área de maior extensão demandou um maior tempo de irradiação para esterilização. Nas próteses totais com a maior área colonizada e irradiadas por 3 minutos, independente da potência não foi detectado crescimento fúngico, sendo significantemente diferente dos demais tempos (p<0,001). As próteses com menor extensão de área colonizada apresentaram-se estéreis após 1 minuto a 900 W e 2 minutos para 450 e 630 W. Houve correlação positiva entre a temperatura final da água e a eficácia da esterilização (r=0, 6170). Considerando as limitações deste estudo, é possível concluir que quanto menor a extensão da área colonizada por biofilme menor é o tempo de irradiação por micro-ondas requerido para a esterilização.
Abstract: Oral candidosis is the most common fungal infection diagnosed in humans. In subjects with compromised immune system, it can disseminate to candidemia, which is related to high mortality and more hospital time consumption. Candidosis is commonly related to denture wearers, characterized by an inflammation of the coverage portion of mucosa, demanding the necessity of microbiologic control of the biofilm accumulated on denture surface for prevention of oral candidosis. Therefore, the aim of this study was to evaluate the influence of Candida albicans biofilm coverage area on the effectiveness of microwave disinfection. One hundred twenty sterile dentures have two distinct areas, 2.35 or 5.50cm2, coverage by 72 hours Candida albicans biofilm. Each denture was immersed in 200 mL of sterile distilled water and was irradiated by 450, 630 or 900 W and different exposure times (1, 2 e 3 min) until no viable cells were detected (n=6). The final temperature was also measured to verify its influence on this process. The results showed statistical difference between the biofilm coverage area (p<0,001), in which a higher coverage demands more exposure time for sterilization. The dentures with higher biofilm coverage and irradiated for 3 minutes, independently of power set, showed no fungal growth, this exposure time was statistically different from 1 and 2 min (p<0,001). Dentures with lower biofilm coverage were sterilized after 1 min at 900 W and 2 min for 450 and 630 W. There was a positive correlation between the final water temperature and the effectiveness of sterilization (r=0, 6170). Considering the limitations of this study, it is possible to conclude that lower biofilm coverage demands a lower microwave exposure time for sterilization achievement.
Mestrado
Protese Dental
Mestre em Clínica Odontológica
Costa, Carolina Bacci. "Avaliação da proporção áurea em radiografias cefalométricas laterais de indivíduos edêntulos antes e depois do tratamento por próteses totais /." São José dos campos : [s.n.], 2009. http://hdl.handle.net/11449/98011.
Full textBanca: Regina Tamaki
Banca: Edmundo Medici Filho
Resumo: O propósito neste estudo foi avaliar razões para verificação da proporção áurea entre estruturas ósseas do crânio e face de indivíduos edêntulos, antes e depois do tratamento por próteses totais. Foram utilizadas 60 radiografias cefalométricas laterais de 30 indivíduos desdentados totais bimaxilares, tratados na Disciplina de Prótese Total da Faculdade de Odontologia de São José dos Campos - UNESP. A técnica radiográfica foi realizada em um único aparelho, pelo mesmo operador, sendo: a primeira radiografia sem as próteses em posição de repouso fisiológico e a segunda com as próteses totais em oclusão cêntrica. As radiografias foram digitalizadas e com o auxílio do programa de computador Radiocef Studio 2 (Radiomemory, Belo Horizonte, Brasil), foi possível criar uma nova análise cefalométrica para a marcação dos pontos cefalométricos e obtenção dos fatores envolvidos nas razões avaliadas. A marcação dos pontos foi realizada em dois tempos, num intervalo de 30 dias, a fim de avaliar o erro intra-examinador. Após análise estatística por meio do teste t de Student e t pareado, comparando-as ao número áureo 1,618, as razões Or-Me/Co-Go, Pog- Op/Or-Me e Pog-Op/Enp-Op não diferiram estatisticamente antes e depois do tratamento protético. As razões Or-Me/Ena-Enp, Or-Me/N-Ena, Or-Me/Op-N e NMe/ Ena-Me diferiram estatisticamente, sendo a última de forma favorável, ou seja, aproximou-se ao número áureo após o tratamento por próteses totais.
Abstract: The aim of this study was to evaluate ratios in edentulous subjects, between bone structures of the skull and face, before and after prosthetic treatment with complete dentures. Sixty cefalometric x-rays from 30 edentulous subjects were used and all the complete dentures were made by School of Dentistry's students, from São Paulo State University. The radiographs were taken by only one examiner, in the same x-ray unit. The radiographs were: the first without the complete dentures, in mandibular rest position, and the second, in centric occlusion. The analysis cephalometrics were performed using the software Radiocef Studio 2 (Radiomemory, Brazil). In order to evaluate error intraexaminer, the cephalometric points were marked in two times in each radiograph. The means of each ratio were statistically analysed by paired t-test and Student's t-test, and compared with the golden number 1,618. There were no statistically significant in ratios Or-Me/Co-Go, Pog-Op/Or-Me and Pog- Op/Enp-Op, before and after prosthetic treatment. The ratios Or-Me/Ena- Enp, Or-Me/N-Ena, Or-Me/Op-N and N-Me/Ena-Me were different statistically. The ratio N-Me/Ena-Me was closer than the golden number, after prosthetic treatment with complete dentures.
Mestre
Porta, Sheila Rodrigues de Sousa 1962. "Avaliação do hipoclorito de sódio a 0,5% como limpador de prótese : estudo clínico." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288046.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: Estratégias que visem prevenir e reduzir a formação de biofilmes sobre próteses são necessárias, pois estas podem atuar como reservatório de micro-organismos. Outro aspecto importante é o estabelecimento de um protocolo de higienização que além de eficiente também seja bem aceito pelos pacientes. Assim, objetivou-se avaliar o efeito do hipoclorito de sódio (NaOCl) a 0,5% sobre o biofilme, estabilidade de cor e rugosidade de superfície (Ra) de próteses totais removíveis e a satisfação do paciente com o tratamento. Foram selecionados 15 voluntários que, após aceitar e assinar as condições do Termo de Consentimento Livre e Esclarecido aprovado pelo Comitê de Ética em Pesquisa da FOP/UNICAMP, foram orientados a complementar a higiene de suas próteses com a imersão em NaOCl 0,5%, durante 3 minutos, uma vez ao dia. O período experimental foi de 90 dias e as variáveis resposta foram mensuradas antes do início do uso do NaOCl e após 30, 60 e 90 dias. A avaliação microbiológica foi realizada no biofilme da prótese e na saliva do voluntário. Toda a superfície da prótese era percorrida por um cotonete de algodão que, em seguida, era individualmente acondicionado em tubo estéril contendo 3 mL de PBS. Amostras da saliva foram acondicionadas em tubos estéreis. Todos os tubos foram sonicados (7W, 30 s), as soluções iniciais serialmente diluídas e plaqueadas, em triplicata, em CHROMagar e ágar sangue. Após um período de incubação de 48 h a 37°C, o número de unidades formadoras de colônia foi determinado. A estabilidade de cor foi avaliada com o uso de um espectrofotômetro de refletância, mensurada no sistema CIELab e correlacionada para o ambiente clínico de acordo com as unidades da National Bureau of Standards (NBS). Para avaliação da Ra, foi realizado um delineamento in situ e espécimes (5 x 5 x 2mm) (n = 90) de resina acrílica termo-polimerizável foram confeccionados e colados na superfície vestibular das próteses inferiores. A rugosidade de superfície foi mensurada com o auxílio de um rugosímetro de contato. Para avaliar a aceitação do paciente com relação ao protocolo, foi pedido aos voluntários que traduzissem em valores o seu grau de satisfação com o tratamento em um intervalo variando de 0 (totalmente insatisfeito) a 10 (totalmente satisfeito). Uma redução significativa no número de micro-organismos totais (ANOVA; p? 0,05) e Candida spp foi observada ao longo do tratamento. Embora tenham sido observadas alterações nos valores de L*, a* e b* nas mensurações de cor, não houve diferença significativa na cor das bases das próteses (Friedman; p? 0,05). Não houve diferença significante na rugosidade de superfície (Kruskal Wallis; p ? 0,05). A satisfação do voluntário com o método de limpeza aumentou durante o período avaliado, chegando a 87% de indivíduos totalmente satisfeitos. Conclui-se que o método de higienização proposto com NaOCl teve ampla aceitação pelos voluntários; além de ser efetivo na redução de micro-organismos, a alteração de cor exibida foi clinicamente aceitável, bem como não houve alteração significativa na rugosidade de superfície
Abstract: Strategies to prevent and to reduce biofilm formation on dentures are necessary, since they may become a reservoir of microorganisms. Additionally, it is important, in establishing a protocol for denture cleaning, to evaluate the effect of the cleaning agent on the prosthetic material and the patients' acceptability. Therefore, the objective of this study was to evaluate the effect of sodium hypochlorite (NaOCl) 0.5% on biofilm, color stability and surface roughness (Ra) of removable dentures besides the patients' satisfaction with the treatment. Fifteen volunteers were recruited and, after accepting the conditions of the Term of Consent approved by the Ethics Committee of FOP / UNICAMP, were instructed to daily immerse their dentures in a 0.5% NaOCl solution for 3 minutes. The follow-up time was 90 days and outcome variables were measured on baseline and on days 30, 60 and 90. For microbiological evaluation, samples were obtained from dentures and saliva. Swabs were taken from the whole surface of the dentures and, then, individually placed in a sterile tube containing 3 ml of PBS. Next, each volunteer was asked to spit into an empty sterile tube. All tubes were sonicated (7W, 30 s), the initial solutions serially diluted and plated in triplicate on blood agar and CHROMagar and, after an incubation period of 48 h at 37°C, the number of colony forming units (cfu/mL) was determined. Color stability was measured with a reflectance spectrophotometer and evaluated using the CIELab system. It was also quantified in accordance with units of the National Bureau of Standards (NBS). To Ra assessment, an in situ design was developed. Specimens (5 x 5 x 2 mm) (n = 90) of heat-polymerized acrylic resin were fabricated and fixed in the buccal posterior surface of lower dentures. The surface roughness was measured using a profilometer. To evaluate the acceptability of the cleaning protocol, each volunteer was asked to translate in values their degree of satisfaction with the treatment at an interval ranging from 0 (totally dissatisfied) to 10 (totally satisfied). A significant reduction in the number of total micro-organisms (ANOVA; p ? 0.05) and Candida spp was observed throughout the treatment. Although changes had been observed in L *, a * b * values, there were no significant color changes (Friedman; p ? 0.05). The surface roughness did not present significant changes after the evaluation period (Kruskal Wallis; p ? 0.05). The volunteers' satisfaction increased throughout the experimental period, reaching 87% of individuals totally satisfied. Data revealed that the 0.5% NaOCl immersion protocol was effective in reducing microorganisms, color changes exhibited for all dentures can be considered clinically acceptable and the surface roughness did not show significant changes. Also, the cleaning method was well accepted by volunteers
Doutorado
Protese Dental
Doutora em Clínica Odontológica
Matta, Rosa Virginia Lopes da. "Efeito da aplicação de selante e da armazenagem sobre a deformação permanente e resistencia a tração da união do condicionador tecidual com resina acrilica." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289920.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O objetivo deste estudo foi avaliar o desempenho de um condicionador tecidual (Coe-Comfort), utilizando ou não selador de superfície, em relação às propriedades de deformação permanente e resistência à tração da união com a resina acrílica (QC-20). As amostras foram armazenadas em água destilada, numa estufa a 37±1oC. Para cada ensaio foram confeccionadas 60 amostras, separadas em 6 grupos de acordo com o tratamento e o período de armazenagem, a saber: Grupo 1- Coe-Comfort sem selador, 1 hora após armazenagem; Grupo 2- Coe-Comfort com selador, 1 hora após armazenagem; Grupo 3- Coe-Comfort sem selador, após 1 semana de armazenagem; Grupo 4- Coe-Comfort com selador, após 1 semana de armazenagem; Grupo 5- Coe-Comfort sem selador, após 2 semanas de armazenagem; Grupo 6- Coe-Comfort com selador, 2 semanas após a armazenagem. Para a confecção das amostras foram utilizadas matrizes metálicas incluídas em mufla, cujo molde impresso no silicone foi preenchido com resina acrílica e/ou condicionador tecidual. O ensaio de deformação permanente foi realizado em aparelho mecânico descrito na especificação ?18 da ADA, e o ensaio de resistência à tração, na Máquina de Ensaios Universal EMIC-DL500MF (5mm/minuto). Os dados obtidos foram submetidos à análise de variância e indicado o teste não paramétrico de Mann-Whitney, em nível de 5% de probabilidade. Para deformação permanente, foram observadas diferenças estatisticamente significantes somente após 1 semana de armazenagem, com valores mais elevados para o grupo tratado com selante de superfície. Para a resistência à tração da união, em relação ao tempo de armazenagem e ao material selador de superfície, pode-se observar que o selamento foi benéfico somente na primeira hora e na primeira semana de armazenagem. Quanto ao tipo de ruptura, após 1 hora de armazenagem, observou-se presença de ruptura do tipo adesiva em 100% das amostras, após 1 semana foi predominantemente coesiva e após 2 semanas foi coesiva em 100% das amostras. Com base nos resultados obtidos, concluímos que existiram diferenças estatisticamente significativas após uma semana de armazenagem, com valores mais elevados no grupo tratado com selante de superfície. No ensaio de resistência à tração pode-se concluir que o selamento foi benéfico ao condicionador tecidual na primeira hora e na primeira semana
Abstract: The purpose of this study was to evaluate the performance of the tissue conditioner (Coe-Comfort), with or without sealer (treatment surface), in relation to permanent deformation and tensile bond strength between resin acrylic (QC-20) and tissue conditioner. In each study there were sixty samples divided in six groups(G), according to the surface treatment and storage time in water, which were the following: G 1- Coe-Comfort without sealer, after 1 hour of stored; G 2 - Coe-Comfort with sealer, after 1 hour of stored; G 3 - Coe-Comfort without sealer, after 1week of stored; G 4 - Coe-Comfort with sealer, after 1 week of stored; G 5 - Coe- Comfort without sealer, after 2 weeks of stored; G 6 - Coe- Comfort with sealer, after 2 weeks of stored. To make the samples metallic matrixes were used invested in flasks, and models were impressed in silicone filled up with acrylic resin and/or tissue conditioner. The samples were stored in water at 37±1ºC for a determined period. The permanent deformation test was done in mechanic machine described in the ? 18 A.D.A¿s specification and the tensile bond strength test was done in a universal testing machine EMIC- DL 500 MF (5 mm/mim). The obtained data was analyzed by Mann-Whitney test at 5% of probability. To permanent deformation significant statistical differences were observed only 1 week after storage, with higher values in the group with treatment surface. To the bond strength to the traction, concerning to the time of storage samples and to the surface treatment, the sealer effect was beneficial at the conditioner only at the first hour and first week. According to the kind of failure, after 1 hour of storage, 100% of samples presented adhesive failures, after 1 week 90% of cohesive and 100% of cohesive failures after 2 weeks. We concluded that the sealer effect after 1 week of storage didn¿t have beneficial influence on permanent deformation of the tissue conditioner. To the tensile bond strength sealer effect was beneficial only in the first and second time of storage
Mestrado
Protese Dental
Mestre em Clínica Odontológica
Silva-Concilio, Lais Regiane da. "Avaliação da dimensão vertical de oclusão e superficie de contato em função de diferentes tecnicas de inclusão e polimerização." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290539.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O objetivo deste estudo foi avaliar a influência da técnica de processamento laboratorial na área de contato em máxima intercuspidação e dimensão vertical de oclusão em pares de próteses totais analisadas antes e após processamento laboratorial. Para isto foram confeccionadas 40 pares de próteses, separadas aleatoriamente em 4 grupos de acordo com o método de polimerização e tipo de mufla: GI ¿ polimerizadas em água 73oC / 9 horas em muflas monomaxilares; GII ¿ polimerizadas por energia de microondas 20 min. a 20% de potência e 5 minutos a 60% de potência em muflas monomaxilares; GIII ¿ polimerizadas em água 73oC / 9 horas em muflas bimaxilares; GIV ¿ polimerizadas por energia de microondas 20 min. a 20% de potência e 5 minutos a 60% de potência em muflas bimaxilares. Foi realizada a mensuração da DVO e da Superfície de Contato antes e após o processamento laboratorial. Para a mensuração da DVO foi utilizada uma base plana e rígida na qual encaixava-se o paquímetro digital e o articulador. Foram realizadas 3 mensurações em cada fase e calculadas as médias. Para a avaliação das superfícies de contato foi utilizado o software Qwin 550 (Leica®), que foram mensuradas 3 vezes em cada amostra nos períodos pré e pós processamento, e calculadas as respectivas médias. Os dados obtidos foram submetidos à Análise de Variância e teste de Tukey em nível de 5% de significância. Os resultados demonstraram que todos os grupos apresentaram uma variação percentual positiva para a DVO: GI= 1,92%; GII= 2,92; GIII= 2,27% e GIV= 2,72%, sendo que GI e GII apresentaram diferença estatística entre si (p= 0,083). Os dados da superficie de contato demonstraram que não houve diferença estatística entre os grupos tanto nos modelos superiores como nos inferiores. Com exceção do grupo GII nos modelos superiores, todos os grupos apresentaram diminuição da superfície de contato. Pode-se concluir que: 1) a DVO foi alterada em todos os grupos estudados independentemente do método de polimerização; 2) o grupo GII apresentou menor variação percentual da DVO; 3) o grupo GI apresentou maior variação percentual da DVO; 4) não houve diferença entre os grupos quanto a análise da Superfície de Contato Oclusal
Abstract: The purpose of this study was to evaluate different flasking technics using monomaxillary and bimaxillary flasks by microwave irradiation and water bath, in the occlusal vertical dimension and the area of the occlusive contact, before and after the curing. Forty pairs of complete dentures were distributed into four groups of ten pair each, according to the treatments: GI ¿ cured by water bath 73oC/9h and monomaxillary flasks; GII ¿ cured by microwave irradiation 20 minutes at 20% power and 5 minutes at 60% power and monomaxillary flasks; GIII ¿ cured by water bath 73oC/9h and bimaxillary flasks; GIV¿ cured by microwave irradiation 20 minutes at 20% power and 5 minutes at 60% power and bimaxillary flasks. For the measurement of the occlusal vertical dimension was used the table that the articulator and the digital caliper was positioned correctly, three vertical measurements were made before and after the curing. The area of occlusive contact was measure using the software Qwin 550 (Leica®), each pair of denture was measure three times before and after the curing. Datas were submitted to variance analysis and Tukey¿s test at 5% significance level. These demonstrated that all groups showed positive percent variation for the occlusal vertical dimension: GI= 1.92%; GII= 2.92; GIII= 2.27% e GIV= 2.72%, there were significant statistical differences between GI and GII (p=0.083). There weren¿t statistical differences in the datas of the area of the occlusive contact, in the upper and lower models. Except GII, in the upper models, every groups showed reduction in the area of the occlusive contact. It is concluded that: 1) the occlusal vertical dimension changed in all groups independently of curing method; 2) the group GII showed the lowest percent variation of the occlusal vertical dimension; 3) the group GI showed the highest percent variation of the occlusal vertical dimension; 4) there weren¿t statistical differences between the groups in the area of the occlusive contact; 5) all the groups, except GII, showed decreasing of the area of the occlusive contact after laboratorial processing
Doutorado
Protese Dental
Doutor em Clínica Odontológica
Silva, Mariana Montenegro [UNESP]. "Desinfecção de próteses totais por micro-ondas: efeito da frequência de irradiação no tratamento da estomatite protética." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/105511.
Full textFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
A estomatite protética é uma infecção fúngica que acomete entre 60% e 72% dos indivíduos portadores de próteses removíveis, sobretudo idosos do gênero feminino. Atualmente, a desinfecção de próteses totais por meio da irradiação por micro-ondas tem sido recomendada para tratamento e prevenção da estomatite protética. Considerando esses aspectos, esse estudo in vivo avaliou a efetividade da frequência da desinfecção de próteses totais por micro-ondas (3 min/650 W) em relação à terapia antifúngica tópica para o tratamento da estomatite protética, além de verificar a prevalência de Candida nos pacientes avaliados. Para isso, foram selecionados 60 indivíduos, portadores de próteses totais superiores e com diagnóstico clínico de estomatite protética. Esses pacientes foram aleatoriamente distribuídos em 3 grupos (n=20), de acordo com o tratamento instituído: Terapia Antifúngica Tópica (Grupo I) - utilização de nistatina (suspensão oral, 100.000 UI/mL), 4 vezes ao dia durante 15 dias; Irradiação por Micro-ondas – imersão das próteses totais em água e irradiação das próteses por micro-ondas durante 3 minutos a 650 W, 1 ou 3 vezes por semana (Grupos II e III, respectivamente) por um período de 15 dias. Para avaliação da efetividade dos tratamentos instituídos, foram realizadas culturas micológicas quantitativas e identificação das espécies de Candida, utilizando-se o meio CHROMagar Candida, análise de microcultivo, teste de triagem em caldo hipertônico e o sistema bioquímico de identificação ID 32C. Coletas de biofilme das superfícies internas das próteses totais superiores e das mucosas palatinas de todos os pacientes, foram realizadas previamente ao tratamento (dia 0) e após 15 dias do seu início. Com o objetivo de avaliar a efetividade dos tratamentos em longo prazo, a quantificação de colônias viáveis de Candiada spp...
Denture stomatitis is a fungal infection that affects 60% to 72% of individuals who use removable dentures, primarily elderly women. Currently, the disinfection of complete dentures using microwave irradiation has been recommended to treat and prevent denture stomatitis. Considering these aspects, this in vivo study evaluated the effectiveness of the frequency of complete denture disinfection using microwaves (3 min/650 W) compared to antifungal therapy for the treatment of denture stomatitis. It also verified the prevalence of Candida spp. in the evaluated patients. This study used a sample of 60 healthy individuals who use complete upper dentures and have received a clinical diagnosis of denture stomatitis. Patients were randomly distributed into three groups (n=20), based on the treatment used: Topical Antifungal Therapy (Group I) – use of nystatin (oral suspension, 100.000 UI/mL), four times a day for 15 days; Irradiation with Microwaves – irradiation of the dentures by microwaves for three minutes at 650 W, one time or three times per week (Groups II and III, respectively) for a period of 15 days. In order to evaluate the effectiveness of the treatments used, quantitative mycological cultures were collected and the Candida species were identified using the CHROMagar Candida method, microculture analysis, screening test in hypertonic broth and the ID 32C biochemical identification system. Biofilm samples were collected from the inner surfaces of the complete upper dentures and from the palatal mucosa of all patients before (day 0) and after 15 days of treatment. In order to evaluate the effectiveness of the treatments over the long term, the quantification of the viable Candiada spp. colonies was repeated 30, 60 and 90 days after starting the treatment. For each consultation (days 0, 15, 30, 60 and 90), a clinical evaluation was also performed through intra-oral photography... (Complete abstract click electronic access below)
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.
Full textPomilio, Arnaldo. "Restabelecimento do plano oclusal e da dimensão vertical de oclusão em dentaduras duplas confeccionadas com base na tecnica de zona neutra e sua avaliação frente aos padrões cefalometricos." [s.n.], 1998. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289081.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O presente trabalho objetiva verificar a validade de algumas referências anatômicas para determinar a altura do plano oclusal, quando da confecção de uma prótese total dupla, utilizando-se a técnica da zona neutra ou do equilíbrio muscular. Também foi avaliada a associação dos métodos de deglutição, métrico, estético e fonético para se determinar a dimensão vertical de oclusão. Para os 42 indivíduos que receberam as dentaduras duplas e as utilizaram por 15 dias para adaptação, foi feita uma telerradiografia em norma lateral com as superfícies oclusais e bordas incisais dos dentes inferiores previamente assinaladas com substância radiopaca. Foi executado um traçado cefalométrico em desdentados e os resultados comparados com os parâmetros universalmente aceitos como normais de padrões cefalométricos, usando-se, principalmente, a Análise de Ricketts apenas nos aspectos que interessavam, complementada por outros referenciais de pesquisa. Os resultados obtidos após a avaliação estatística permitiram concluir que: 1- A altura do lábio inferior em repouso, o maior diâmetro da língua, a ponta da língua, a metade da papila retromolar e o relativo paralelismo entre o rebordo alveolar superior e inferior são referências seguras para se determinar a altura do plano oclusal em próteses totais duplas, confeccionadas com base na técnica de zona neutra ou equilíbrio muscular quando comparado aos padrões de cefalometria. 2- A associação dos métodos de deglutição, métrico, fonético e estético para determinar a dimensão vertical de oclusão em indivíduos desdentados que receberam prótese total dupla também se mostrou eficiente quando comparada aos padrões cefalométricos. 3- Como mais uma referência para determinar a dimensão vertical de oclusão em pacientes que receberão uma prótese total dupla, pode-se utilizar as fórmulas: proporção espinha nasal anterior
Abstract: This dissertation aims at checking the validity of some anatomical references used to determine the height of the occlusal plane when manufacturing complete dentures based on the neutral zone or muscular balance technique. The association of the deglutition, metric, esthetic and phonetic methods was also evaluated to determine the occlusal vertical dimension. The 42 individuais who received double dentures and used them for 15 days for adaptation had a teleradiography taken at lateral norm, with the occlusal surfaces and incisal edges of the lower teeth previously marked with a radio-opaque substance. A cephalometric outline within the toothless individuals' limitations was done, and the results were compared to the parameters universally accepted as normal cephalometric standards. The Ricketts Analysis was mainly used to compare results, but only when it suited our purposes, and it was complemented by other research references: The results obtained after statistical evaluation show: 1- When compared to cephalometric standards, the height of the lower lip at rest, the largest diameter of the tongue, the tip of the tongue, half the retromolar pad and the relative parallelism between the upper and lower alveolar rim are sure references to determine the height of the occlusal plane when manufacturing double total prosthesis based on the neutral zone or muscular balance technique. 2- The association of deglutition, metric, esthetic and phonetic methods to determine the occlusal vertical dimension in edentulous individuais receiving double complete dentures has also proved efficient when compared to cephalometric standards. 3- The formulas below can be used as another reference to determine occlusal vertical dimension in patients receiving a complete dentures: ratio anterior nasal spine I mentum = 1.3 ratio nasion I anterior nasal spine or ratio nose basis I mentum = 1.19 ratio eye external corner I buccal commissure
Doutorado
Protese Dental
Doutor em Clínica Odontológica
Yamaguchi, Flavio Jun. "\"Avaliação dos efeitos da alteração dimensional de resinas para base de próteses totais submetidas a diferentes técnicas de processamento avaliados ao nível condilar\"." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/23/23137/tde-30102006-152609/.
Full textThe objective of this study is to evaluate the dimensional acrylic resin alterations submitted to different types of processing evaluated to the level of the condyle. The experimental conditions were introduced in three stages. In stage A , the acrylic resins (Classic, Ondacryl, Acron MC, Lucitone and QC-20) were enclosed in flasks contend plaster wall, pressed in the plastic phase and submitted to five cycles of acrylization. In stage B, the QC-20 and the Lucitone were used with three types of wall (plaster, silicone (ZETALABOR) and silicone film (VIPISIL)), and with two phases of chemical reaction of the acrylic resin (fluid and plastic). In stage C, the resin Acron MC with two cycles of polymerization was used (90W for thirteen minutes and 500W for three minutes) by changing the type of wall as in stage B. For the study, 5 complete dentures for each group were made. At the end of the experiment, 23 groups were obtained, totalizing 115 superior complete dentures. Positional variation of the upper member of the articulator T.T.was measured before and after the processing, based on the maximum intercuspidation orientation. Such variation was registered by using plaster type IV shed in the space around of the condyle spheres, previously provided by means of spacers used before the processing. Three distances in each condyle sphere were measured (superoinferior, anteroposterior and mediolateral) resulting in 690 measures that varied from 0 to 3 mm, with average of 0,79 mm and shunting line standard of 0,59 mm. An alteration in 687 measures occurred and there was difference between the groups statistically significant, mainly for the anteroposterior distance on the left side. The conclusion was that the dimensional resin alterations modified the positions of the condyle spheres
Pisani, Marina Xavier. "Avaliação eletromiográfica e análise da qualidade de vida de edentados totais antes e após o reembasamento das próteses inferiores." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-04072012-105942/.
Full textThe present study aimed to analyze the impact of denture relining with hard and soft denture liners in the electromyographic activity and oral health related quality of life (OHRQoL) of edentulous patients. Forty and four complete denture wearers were distributed in two groups. In group 1 (n=22), the mandibular dentures were relined with a soft silicone based liner (Mucopren Soft) and in group 2, with a hard acrylic based denture liner (Kooliner) by chairside procedures. The electromyography of masseter and temporal muscles and the OHRQoL analysis were assessed before relining (baseline-T0) and after 90 days (T90) of the intervention. The questionnaire OHIP-EDENT, that was used to evaluate the OHRQoL, is composed of four domains, and three possible answers (scores) to the questions: never (0), sometimes (1) and almost always (2). After the normalization of the electromyographic signal, patients had been instructed to perform the maximum voluntary contraction in MIH (static test), and the following variables were considered: POC (%), tors (%) and total of electromyographic activity or impact (μV / μV.s %). After that, they performed masticatory movements by chewing peanuts, cereal bar and chocolate (dynamic test), with the following variables: neuromuscular coordination (%), frequency (Hz) and impact (μV / μV.s %). The results were analyzed by means of the generalized linear model (p≤0,05). The scores comparison of the OHRQoL indicated significant difference among T0 and T90, regardless the group, which represented an improvement in questions related to mastication (domain 1; p=0,007), oral pain and discomfort (domain 4; p= 0,047) and in overall OHIP (p=0,025). There was no significant difference between the groups for none of the domains and for the overall OHIP. Regarding POC of masseter and temporal, no significant differences between times (POCmas p=0,147; POCtem p=0,469) and groups (POCmas p=0,549; POCtem p=0,104) were found. For tors, significant difference between the groups was not found (p=0,971), and, it decreased in T90 (p=0). There was no significant difference between the groups (p=0,067), for the impact, which increased in T90 (p=0). The neuromuscular coordination during chocolate (p=0), cereal bar (p=0) and peanut (p=0) mastication increased in T90 and there was no significant difference between the groups (chocolate p=0,087; cereal p=0,185; peanut p=0,472). Significant difference between the groups (p=0,530) and times (p=0,685) for the frequency during chocolate mastication was not found. For peanut and cereal bar, the frequency increased in T90 (peanut p=0,03; cereal p=0,007) and there was no difference between the groups (peanut p=0,566; cereal p=0,173). The impact, during chocolate mastication, increased in T90 (p=0), and the hard group presented higher values than the soft (p=0,018). For peanut and bar of cereal mastication, the impact increased in T90 (peanut p=0; bar p=0) and there was no significant difference between the groups (peanut p=0,428; bar p=0,590). It can be concluded that the relining increased the electromyographic activity of the evaluated muscles and improved the masticatory function and the OHRQoL. There was no significant differences among the hard and soft denture liners for most of the tested variables.
Caetano, Conrado Reinoldes 1988. "Influência da inclinação do implante na distribuição de tensões em sistema de retenção de overdentures tipo barra-clipe com desajuste vertical." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290325.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O objetivo neste estudo foi avaliar a distribuição de tensões em overdentures com sistema de retenção tipo barra-clipe apresentando diferentes inclinações dos implantes, desajuste vertical e material da barra. Para isso foram confeccionados modelos tridimensionais de mandíbula e overdenture fixada por dois implantes com sistema de retenção barra-clipe que foram modelados com software específico (SolidWorks 2010) ... Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digita
Abstract: The aim of this study was evaluate the stress distribution in overdentures with a bar-clip retention system presenting different implant inclinations, vertical misfit, and framework materials. Three-dimensional models of a jaw, an overdenture retained by two implants and a bar-clip attachment were modeled using specific software (SolidWorks 2010) ... Note: The complete abstract is available with the full electronic document
Mestrado
Protese Dental
Mestra em Clínica Odontológica
Caldas, Ricardo Armini 1989. "Influência da inclinação de implantes e da seção transversal da barra com desajustes horizontais na distribuição de tensões em overdentures." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288539.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O uso de prótese total implanto-retida tem sido indicada atualmente como primeira opção de tratamento para uma mandíbula desdentada; no entanto, os fatores biomecânicos associados a ela não estão totalmente esclarecidos. O objetivo neste estudo foi avaliar por meio da análise tridimensional por elementos finitos o comportamento biomecânico do sistema de retenção barra-clipe para overdentures com barra de diferentes secções transversais (circular, oval e Hader), níveis de desajuste horizontal (50 e 150 µm) e inclinações em um dos implantes no sentido látero-lateral (-10, -5, 0, 5 e 10 graus). As angulações positivas (5 e 10 graus) dos implantes representam a inclinação da região cervical do mesmo para mesial, valores negativos (-10, -5 graus) inclinação para distal e o valor de 0 graus para os implantes paralelos. Os resultados foram obtidos de forma quantitativa e qualitativa em tensão de von Mises para os componentes protéticos, tensão máxima principal e deformação para o tecido ósseo. Foi observado que na inclinação 10 graus ocorreu o pior comportamento biomecânico, promovendo os maiores valores de tensão sobre a barra e tecido ósseo peri-implantar. Os grupos com inclinação negativa (distal) apresentaram os menores valores de tensão sobre os componentes protéticos e na inclinação -10 graus foi observado o menor valor de deformação no tecido ósseo peri-implantar. O aumento do desajuste horizontal aumentou os valores de tensão em todas as estruturas avaliadas. A seção da barra não demonstrou influência nas tensões geradas. Concluiu-se que a inclinação do implante para mesial aumentou a tensão em todos os componentes e a maior inclinação (10 graus) causou os maiores valores; os implantes com inclinação para distal geraram os menores valores de deformação no tecido peri-implantar. As diferentes secções transversais da barra não influenciaram os valores de tensão em todos os componentes do sistema
Abstract: The most common treatment for edentulous patients is conventional denture. However, implant-retained prosthodontics is actually the first option for treatment of these patients. The aim of this study was to evaluate by 3-D finite element analysis the biomechanics involved in the bar clip retention system for overdentures. The study factors were latero-lateral angulation in the right implant (-10, -5, 0, 5 and 10 degrees); horizontal misfit on the left implant (50 e 150 µm), and bar cross-section (round, Hader and oval). Positive angulation (5 and 10 degrees) means inclination of the implant to mesial position, negative values (-5 and -10 degrees) for distal position and zero degress for parallel implants. The von Mises stresses evaluated the prosthetic components; maximum principal stresses, and strain analyses evaluated the peri-implantar bone. The positive angulation (10 degrees) showed the worse biomechanical behavior for bar and peri-implantar bone, with higher stress concentration. Conversely, the negative angulation showed the lowest stress deformation to the peri-implantar bone. The amplitude of horizontal misfit was directly proportional to stress concentration. Bar Cross-sections did not affect the stress distribution. It was possible to conclude that: the mesial implant angulation produced more stresses in the prosthetic components; distal angulation showed better biomechanical behavior; and bar cross-section had no influence on stress distribution
Mestrado
Protese Dental
Mestre em Clínica Odontológica
Sorgini, Danilo Balero. "Avaliação das variações de massa e rugosidade de superfície causadas pelos métodos mecânico (escovação) e combinado (escovação e imersão) de higiene de próteses totais." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-20032015-110233/.
Full textThe aim of this study was to evaluate the mass variation and changes in surface roughness when mechanical and chemical methods of denture cleanser were associated. Two hundred and forty Plexiglass specimens (90x30x3 mm) were used. The brushing test was carried out using a toothbrushing machine (Mavtec), with a frequency of 356 rpm, course covered by brush corresponds to 3.8 cm, the load was standardized at 200 g, and length of 50 minutes (01 year of brushing). As suspensions, were utilized distilled water and 04 dentifrices (02 conventional: Sorriso and Colgate; and 02 indicated for denture cleanser: Polident and Corega). After brushing, the specimens were immersed in sodium hypochlorite (NaClO) 0,5%, Ricinus communis 10% solution and Corega Tabs for 121,6 hours (01 year of immersion, 20 minutes daily - short cycle) and 2920 hours (01 year of immersion, 8 hours daily - long cycle). Twenty groups were obtained, associating the 05 brushing solutions with the four immersion products. The specimens were weighed before the tests (M0), after the brushing test (M1), after short cycle immersion test (M2) and after the long cycle immersion test (M3) in a precision balance (Metler Toledo GMbH). The surface roughness (μm) was evaluated by a rughosimeter (Surftest SJ-201P) before the tests (R0), after the brushing test (R1), after short cycle immersion test (R2) and after the long cycle immersion test (R3). The mechanical method results was submitted to Kruskal-Wallis non-parametric test, and Dunn\'s test (p<0,01); For the hygiene methods, the linear regression analysis (p<0,01) was used. For the mechanical method, the dentifrice that caused the greatest mass variation was Sorriso (-0,0111±0,0032), while the lowest variation was caused by Polident (-0,0069±0,0023). For the surface roughness, the greatest values were obtained for Sorriso (2,2003±1,8932), and the lowest, for Corega (0,9263±0,8621). For the comparison of the methods, for the mass variation, when the combined method was performed with immersion in sodium hypochlorite, there was mass loss after both combined cycles. Immersions in water, Ricinus communis and Corega Tabs, resulted in mass increase. For the surface roughness changes, there was no significant difference between methods or solutions used for immersion tests. It was concluded that it is important to indicate specific dentifrices for complete dentures, due to the small magnitude of the adverse effects, and that the incorporation of a chemical method to the brushing does not cause clinically significant adverse effects
Hyde, Timothy Paul. "A cross-over randomised controlled trial of selective pressure impressions for lower complete dentures and laboratory investigations into impression pressure variation." Thesis, University of Leeds, 2011. http://etheses.whiterose.ac.uk/1761/.
Full textSilva, Paulo Mauricio Batista da. "Efeito antimicrobiano das soluções desinfetantes sobre biofilmes de C. albicans em resinas acrílicas termopolimerizáveis." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/25/25135/tde-25052009-134558/.
Full textDisinfectant solutions have been used as one of the principal methods to control microbial biofilms such as those formed on the complete denture surface. The aim of this study was to analyze the antimicrobial effect of disinfectant solutions on C. albicans biofilms on heat-polymerized acrylic resin by microbiological culture analysis, confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM). Sixty specimens (5 x 5 x 1 mm) were fabricated, sterilized and individually inoculated with C. albicans (1.107 cells/mL) during 24 hours at 37°C to allow the biofilm formation. After that, these 24 specimens were randomly divided into 4 groups (n=6) according to the disinfection solutions tested: G1 (control) distilled water for 10 minutes; G2 4% chlorhexidine gluconate for 10 minutes; G3 1% sodium hypochlorite for 10 minutes; G4 2% sodium hypochlorite for 5 minutes. After disinfection, the remaining biofilms on the specimens were stained with fluorochromes SYTO-9 and propidium iodide to be analyzed by CLSM. Furthermore, the same disinfection process was applied to another 24 specimens which were submitted to microbiological culture analysis. After 48 hours of incubation, quantification of colony-forming units (CFU/mL) was performed. Also, the same disinfection process was applied to the remaining 12 specimens for the SEM analysis. The data were statistically analyzed using the Kruskal-Wallis and Student- Newman-Keuls tests, considering a significance level of 5%. The data obtained by CLSM revealed that all disinfectant solutions killed all remaining fungal cells on the specimens. Similar results were obtained by microbiological culture analysis, where all disinfectant solutions were able to avoid fungal growth in culture. CLSM and SEM analyses of specimens indicated that the 4% chlorhexidine gluconate solution did not remove the C. albicans cells from the resin acrylic surface. On the other hand, the 1% and 2% sodium hypochlorite solutions provided an almost complete biofilm removal from the acrylic surface. Furthermore, by SEM examination, morphologic damages became evident in the few residual Candida cells after 1% sodium hypochlorite disinfection. Thus, such findings suggest that, under the experimental conditions of this study, the 1% and 2% sodium hypochlorite solutions showed superior antimicrobials effect when compared with the 4% chlorhexidine gluconate solution.
Segundo, Antonio de Luna Malheiros. "Solução efervescente para higiene de próteses totais: influência na sorção de água, solubilidade, dureza e na alteração de cor de reembasadores." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-01042008-095332/.
Full textThe aim of this study was to evaluate the physical properties of denture liners after immersion in a sodium perborate´s solution. In all the tests, both materials, Kooliner and Elite soft, were divided into the groups G1 (control): immersion in artificial saliva at 37°C and G2 (experimental): daily immersions in a sodium perborates´s solution (Corega Tabs) for five minutes. Thirty specimens (diameter of 15 mm and thickness of 3 mm) were obtained for the tests of water sorption, solubility, color change and hardness. Each material was processed according to the manufacturer´s directions in metallic moulds prepared for this purpose and compressed by two glass plates. Water sorption and solubility were evaluated after 120 of immersion. Color change was evaluated after specimens´ finishing, after thirty and sixty days of immersion. Kruskal Wallis (P<0,05) indicated that the immersion in sodium perborate (G1=1,43; G2=1,63) did not interfere in the water sorption values. Sodium perborate promoted significative raise in the Elite soft´s water sorption (G1=0,29; G2=0,51). Comparing the materials, Kooliner had the biggest means in both groups. In the solubility test, ANOVA (P<0,05), using two variation factors, indicated signifficant difference between groups and materials. Kooliner (0,168) and Group 1 (0,137) presented the biggest solubility means when compared with Elite soft (0,089) and Group 2 (0,110). Both materials changed between 30 (Kooliner: G1=3,63, G2=2,87; Elite soft: G1=6,27, G2=6,01) and 120 (Kooliner: G1=4,21, G2=3,94; Elite soft: G1=8,54, G2=9,23) days of immersion in the color test (Anova, P<0,05). To the Kooliner´s hardness, the ANOVA with two variation factors, indicated signifficant differece only for the time of immersion (grupo: G1=6,63; G2=7,27 e tempo: T0=5,24; T30=7,28; T60=8,34). Comparing the means (Tukey=0,87) a signifficant raise (P<0,05) of the hardness was observed between all the periods evaluated. Specimens of the experimental group of Elite soft (49,18) showed a raise (P<0,05) in the hardness when compared to the control group (48,72). The test of Tukey (0,76) indicated significant difference (P<0,05) in the time of immersion between the three means (T0=46,45; T30=49,63; T60=50,74). Sodium perborate did not influence significantly the properties evaluated in this study. Between the materials, Kooliner presented the best stability. But both materials have different compositions and behave in different ways clinically. The period of immersion is a very important factor in the physical properties of the materials; and all of them presented signifficant differences during this period. Studies with the intention of improving the materials´ properties for a long term use should be tried to make viable the use of denture liners.
Silva, Mariana Montenegro. "Desinfecção de próteses totais por micro-ondas : efeito da frequência de irradiação no tratamento da estomatite protética /." Araraquara : [s.n.], 2009. http://hdl.handle.net/11449/105511.
Full textBanca: Ana Cláudia Pavarina
Banca: Elaine Maria Sgavioli Massucato
Banca: Helena de Freitas Oliveira Paranhos
Banca: Karin Hermana Neppelenbroek
Resumo: A estomatite protética é uma infecção fúngica que acomete entre 60% e 72% dos indivíduos portadores de próteses removíveis, sobretudo idosos do gênero feminino. Atualmente, a desinfecção de próteses totais por meio da irradiação por micro-ondas tem sido recomendada para tratamento e prevenção da estomatite protética. Considerando esses aspectos, esse estudo in vivo avaliou a efetividade da frequência da desinfecção de próteses totais por micro-ondas (3 min/650 W) em relação à terapia antifúngica tópica para o tratamento da estomatite protética, além de verificar a prevalência de Candida nos pacientes avaliados. Para isso, foram selecionados 60 indivíduos, portadores de próteses totais superiores e com diagnóstico clínico de estomatite protética. Esses pacientes foram aleatoriamente distribuídos em 3 grupos (n=20), de acordo com o tratamento instituído: Terapia Antifúngica Tópica (Grupo I) - utilização de nistatina (suspensão oral, 100.000 UI/mL), 4 vezes ao dia durante 15 dias; Irradiação por Micro-ondas - imersão das próteses totais em água e irradiação das próteses por micro-ondas durante 3 minutos a 650 W, 1 ou 3 vezes por semana (Grupos II e III, respectivamente) por um período de 15 dias. Para avaliação da efetividade dos tratamentos instituídos, foram realizadas culturas micológicas quantitativas e identificação das espécies de Candida, utilizando-se o meio CHROMagar Candida, análise de microcultivo, teste de triagem em caldo hipertônico e o sistema bioquímico de identificação ID 32C. Coletas de biofilme das superfícies internas das próteses totais superiores e das mucosas palatinas de todos os pacientes, foram realizadas previamente ao tratamento (dia 0) e após 15 dias do seu início. Com o objetivo de avaliar a efetividade dos tratamentos em longo prazo, a quantificação de colônias viáveis de Candiada spp... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Denture stomatitis is a fungal infection that affects 60% to 72% of individuals who use removable dentures, primarily elderly women. Currently, the disinfection of complete dentures using microwave irradiation has been recommended to treat and prevent denture stomatitis. Considering these aspects, this in vivo study evaluated the effectiveness of the frequency of complete denture disinfection using microwaves (3 min/650 W) compared to antifungal therapy for the treatment of denture stomatitis. It also verified the prevalence of Candida spp. in the evaluated patients. This study used a sample of 60 healthy individuals who use complete upper dentures and have received a clinical diagnosis of denture stomatitis. Patients were randomly distributed into three groups (n=20), based on the treatment used: Topical Antifungal Therapy (Group I) - use of nystatin (oral suspension, 100.000 UI/mL), four times a day for 15 days; Irradiation with Microwaves - irradiation of the dentures by microwaves for three minutes at 650 W, one time or three times per week (Groups II and III, respectively) for a period of 15 days. In order to evaluate the effectiveness of the treatments used, quantitative mycological cultures were collected and the Candida species were identified using the CHROMagar Candida method, microculture analysis, screening test in hypertonic broth and the ID 32C biochemical identification system. Biofilm samples were collected from the inner surfaces of the complete upper dentures and from the palatal mucosa of all patients before (day 0) and after 15 days of treatment. In order to evaluate the effectiveness of the treatments over the long term, the quantification of the viable Candiada spp. colonies was repeated 30, 60 and 90 days after starting the treatment. For each consultation (days 0, 15, 30, 60 and 90), a clinical evaluation was also performed through intra-oral photography... (Complete abstract click electronic access below)
Doutor
Kiausinis, Max Dalla. ""Estudo comparativo da largura dos dentes naturais anteriores superiores em ralação aos dentes artificiais para prótese total"." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/23/23137/tde-12112005-095159/.
Full textIt was studied the width of upper anterior teeth in 121 Brazilian college students intending to determine which models and brands would be more adequate to such group. The whole dental arch was molded with alginate and stone type four was poured in the oclusal surface of teeth while stone type two was poured in the left parts. Those teeth did not present abnormal abrasions, fillings or deformities. Periodont was healthy presenting little or none gengival retraction, inflamation or hipertrophy. Both stone models and artificial teeth had their mesio-distal distance (width) measured by a digital caliper rule. It was not observed significant difference between genders or right and left hemi-arches when comparing to the upper anterior teeths width. Considering the analyzed brands none was considered appropriate to such group because there were little options besides sizes being considered too small when compared to natural teeth, which pointed to the necessity to adapt or to create models more adequate to the Brazilian reality.
El-Feky, Ahmed. "The effects of prosthetic rehabilitation and dietary intervention on quality of life, satisfaction and nutritional status in edentulous adults : implant-supported overdentures versus conventional complete dentures." Thesis, University of Newcastle upon Tyne, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.438022.
Full textSegundo, Antonio de Luna Malheiros. "Avaliação clínica e laboratorial de uma solução experimental para higiene de reembasador resiliente para prótese total." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-08062011-152654/.
Full textThe aim of this study was to evaluate the effectiveness of hygiene methods on biofilm removal of the lower denture relined with a silicone material. Thirty patients had their lower dentures relined (Mucopren soft) and randomly divided into three groups: A) Mechanical method brushing with toothpaste (Corega Brite) and toothbrush (Johnson) specific for complete dentures; B) Chemical method immersion in Ricinus communis based solution; C) Associate method association of A and B. The experimental period lasted 60 days and for the biofilm quantification, the internal surface of the lower denture was evidenced (Sodium fluorescein 1%) and photographed, after 15, 30 and 60 days of use of the prostheses. Total and evidenced (biofilm) area of the dentures were measured by the software Image Tool 3.0 and the results were expressed in percentages. Microbiological analysis was performed by the DNA-DNA checkerboard technique. For the qualitative evaluation of the soft liner, scores were attributed to the prostheses (0, 1 and 2) according to the presentation of the material after evaluation periods. After verification of distribution and homogeneity of data, it was found that the distribution was not normal or homogeneous, opting for transformation in square root in order to apply parametric statistics. For the biofilm quantification, Anova was employed followed by the Tukeys test considering P<0,05. There were significant difference between the methods (P=0,009) and periods (P=0,003) evaluated. There was no interaction between the factors (P=0,5). Mechanical method presented the lowest mean percentage of biofilm. (1,45±1,03) when compared to the chemical (2,96±1,98) and to the associated method (2,71±1,76). After 60 days (3,37±2,04), the accumulation of biofilm was greater than after 15 (1,28±0,77) and 30 (2,46±1,54) days of the methods use. To analyze the antimicrobial efficacy, the generalized linear method was used. The test showed no interaction between periods and groups. Between groups, 10 of the 38 species evaluated presented statistical difference; and the immersion method showed the lowest counting values of those microorganisms. Only one specie presented statistical difference between the periods. After the visual analysis, it was found that the level of the dentures cleaned by the mechanical method exhibited the lowest percentage of biofilm area and presented the lowest level of degradation of the liner. The chemical method was more efficient in reducing the count of bacteria, including the Candida spp.