To see the other types of publications on this topic, follow the link: Dental therapy.
Dissertations / Theses on the topic 'Dental therapy'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Dental therapy.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Troulis, Maria J. "Dental extractions in patients receiving oral anticoagulant therapy." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ37316.pdf.
Full text
2
Alsaif, Aysha S. Y. A. S. "Treatment of dental plaque biofilms using photodynamic therapy." Thesis, University of Leeds, 2017. http://etheses.whiterose.ac.uk/18523/.
Full textAbstract:
BACKGROUND: Photodynamic therapy (PDT) is a treatment modality involving a dye that is activated by exposure to light of a specific wavelength in the presence of oxygen to form oxygen species causing localised damage to microorganisms. AIM: To determine the most effective bactericidal incubation and irradiation times of erythrosine-based PDT, using a tungsten filament lamp, on in vivo- formed dental plaque biofilms. MATERIALS AND METHODS: The study was a two-phase randomised controlled study consisting of in-vitro and in-situ phases. Phase-1 aimed to determine the most appropriate incubation-time using erythrosine(220μM) based-PDT on lactobacillus species grown in-vitro. Phase-2 was conducted on 18-healthy adult participants wearing intraoral appliances with human enamel slabs to collect dental plaque samples in two separate periods for use in arm-1 and arm-2. For phase-2, accumulated dental plaque samples were tested under different experimental conditions; a) Control-1 (No erythrosine, no light); b) Control-2 (+Erythrosine, no light); c) Treatment-1 (+Erythrosine, +15min continuous light); d) Treatment-2 (+Erythrosine, +30sec light pulses for 5- times separated by 1min dark periods). Incubation-times of 15min and 2min were used in arm-1 and arm-2, respectively; as adapted from the previous pilot study and phase-1. Following treatment, percentage reduction of total bacterial counts were compared between the different groups. Additionally, Confocal Laser Scanning Microscopy(CLSM) was used to investigate the effect of PDT on in vivo-formed plaque biofilms. RESULTS: Significant reductions in the percentage of total bacterial counts (~93-95%) of in vivo-formed biofilms were found when using either 2min or 15min incubation-times and applying 15min continuous light. Whereas, when applying fractionated light, there was more cell death when 15min incubation-time was used (~91%) compared with the 2min incubation-time (~64%). CLSM results supported these findings. CONCLUSION: Improving the clinical usefulness of PDT by reducing its overall treatment time seems to be promising and effective in killing in vivo- formed dental plaque biofilms.
3
Patel, Upen Sachin. "Kilohertz ultrasound as a potential therapy for dental repair." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6960/.
Full textAbstract:
Biological effects are known to occur with ultrasound energy at kilohertz frequencies. This has led to research into its use as a non-invasive tool for tissue healing and repair. The aim of this research is to investigate the in vitro application of kilohertz ultrasound and to measure the biological responses using models of dental pulp cells which play an important role in dental repair. Ultrasound emitted from a longwave therapy instrument (DuoSon, SRA Developments Ltd) was characterised and measured identifying the range and intensity of the field. These measurements, coupled with biological data, identified the difficulties when conducting research with kilohertz ultrasound in vitro and indicated that the use of multi-well culture plates is not appropriate when investigating the effects of kilohertz ultrasound in cell culture. An improved method for in vitro kilohertz ultrasound application was devised enabling the investigation of non-thermal ultrasound effects on primary human dental cells. Cell proliferation, viability and gene expression, including the dental-related and biomechanically-responsive gene, dentine matrix protein-1, responded in a dose-dependent manner with respect to the duration of ultrasound application. These findings highlight the complexity of the biophysical interaction of kilohertz ultrasound with cells and demonstrate the need for further clarification of specific ultrasound settings for optimal therapeutic application. This study has demonstrated a positive effect of kilohertz ultrasound on human dental pulp cells and has identified methods to improve in vitro cell culture models to capture robust data to develop a novel therapy for dental repair.
4
Thiradilok, Sasipa. "Changes in Dental Arch Dimension among Dental Class II Patients after Rapid Maxillary Expansion Therapy." Diss., lmu, 2008. http://nbn-resolving.de/urn:nbn:de:bvb:19-85316.
Full text
5
Peterson, Aida N. "Antibacterial antibodies in the sera of patients needing endodontic therapy." Google Book Search Library Project, 1988. http://books.google.com/books?id=THg9AAAAMAAJ.
Full text
6
Tse, Chung-ming, and 謝忠明. "A study of conventional root canal therapy performed by dental students." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1990. http://hub.hku.hk/bib/B31953931.
Full text
7
Tse, Chung-ming. "A study of conventional root canal therapy performed by dental students /." [Hong Kong] : University of Hong Kong, 1990. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12776567.
Full text
8
Miller, Neil Thomas. "Evaluation of microleakage of RSA Roekoseal Automix root canal sealer." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=1960.
Full textAbstract:
Thesis (M.S.)--West Virginia University, 2001.Title from document title page. Document formatted into pages; contains vii, 23 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 15-21).
9
Kaufman, DeAnn L. "An analysis of periodontal therapy practices by Wausau, Wisconsin area dental hygienists." Online version, 2008. http://www.uwstout.edu/lib/thesis/2008/2008kaufmand.pdf.
Full text
10
Harris, Marina. "Dental hygiene and therapy students' experiences of psychological wellbeing in their undergraduate education." Thesis, University of Portsmouth, 2018. https://researchportal.port.ac.uk/portal/en/theses/dental-hygiene-and-therapy-students-experiences-of-psychological-wellbeing-in-their-undergraduate-education(56d1b2c5-f751-41fc-b380-8b2a70695689).html.
Full textAbstract:
Background: Dental schools are recognised to be highly demanding and stressful learning environments. Studies which have examined stress and psychological wellbeing of students within the dental undergraduate environment have, for the last four decades, focused on negative measures of psychological wellbeing. In addition, these studies have been exclusively targeted at dental students; and therefore, ignored the education of other dental professionals. Aims: The aim of this programme of studies was to explore our understanding of stress and positive psychological wellbeing of dental hygiene and therapy students from both a national and international perspective, and then to utilise this knowledge to implement a possible intervention. Participants and methods: The research involved a mixed-method approach using validated psychological tools, semi-structured interviews, and participation in an intervention workshop. Statistical analyses of quantitative data collected were handled with SPSSTM software. Thematic analyses of students' experiences of stress and wellbeing were undertaken using Braun and Clarke's six stages of thematic analysis. Results: Data showed that dental hygiene and therapy students reported similar sources of stress to that of dental students. However, at the same time, the participants also reported high levels of positive psychological wellbeing. The qualitative study showed that, for dental hygiene and therapy students, the significance of the meaning they attributed to their undergraduate training mitigated much of their stressful experiences. Scores from the intervention study showed that taking a positive approach to the education of stress and wellbeing within the dental hygiene and therapy curricula had a beneficial impact on the way participants understood their experience of stress. Conclusions: The results from this programme of studies has made a valuable contribution to our understanding of stress and wellbeing in dental hygiene and therapy undergraduate education. Within the limitations of these studies, stress was seen in a broader context. This research brought into question whether eliminating stress was necessary, or indeed relevant, and concluded that psychological wellbeing needs to be explored further. It highlighted the important role meaning held, and the relationship between meaning and stress. It is concluded the need to argue for psychological interventions/education to be included within the undergraduate curriculum for all dental professionals.
11
Frota, Bruna Marjorie Dias. "Antimicrobial photodynamic therapy on acrylic resin specimens made in different dental prosthetic laboratories." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=9490.
Full textAbstract:
This study evaluated the effect of photodynamic therapy on acrylic resin specimens made in different dental prosthetic laboratories. Six laboratories (L), registered in the Regional Council of Dentistry of CearÃ, were randomly selected and were not identified to the operator of the experiments. The therapy used erythrosine 22 ÂM as photosensitizer (P) associated with irradiation with LED of 520 nm, at 38 J/cm2 (L). Fifty specimens of each laboratory were divided into 5 groups (n: 10): sterile positive control in Ethylene Oxide (EO); negative control (P-L-), untreated; control (P+L-) only stained with erythrosine; control (P-L+) only irradiated with 520 nm LED; experimental (P+L+). The specimens were placed in individual tubes containing saline solution and the obtained suspension was diluted and plated on Blood Agar, Sabouraud Dextrose and CHROMagar OrientationÂ, for incubation within 48 hours at 37ÂC. The number of colony- forming-units of viable bacteria and yeasts was obtained. The statistical tests of Kruskal-Wallis and Dunn were carried out, which showed a significant difference between the groups (P-L-) and (P+L+) (p <0.0001), identifying contamination with different microorganisms in the six laboratories, such as Enterococcus spp, Pseudomonas spp, Staphylococcus aureus, Klebsiella, Escherichia coli and Staphylococcus saprophyticus. Viable bacteria were eliminated by 100% in laboratories L1, L2, L4 and L5. In laboratories L3 and L6 elimination of viable bacteria was 99%. The viable yeasts were completely eliminated after PDT for laboratories L1, L2, L4 and L5. In the laboratory L3, viable yeast count was reduced by 97% after PDT, whereas in the L6, the reduction was 94%. It was concluded that PDT was effective in microbial removal from the surfaces of the acrylic resin specimens.InfecÃÃo cruzada entre consultÃrio odontolÃgico e laboratÃrio de prÃtese pode ocorrer quando procedimentos de biosseguranÃa nÃo sÃo executados adequadamente. A desinfecÃÃo dos trabalhos protÃticos à uma etapa importante para prevenir a contaminaÃÃo cruzada entre pacientes, dentistas e tÃcnicos de laboratÃrio. Este estudo avaliou a eficÃcia da terapia fotodinÃmica (TFD) sobre espÃcimes de resina acrÃlica confeccionados em seis diferentes laboratÃrios de prÃtese dentÃria. Os laboratÃrios, cadastrados no Conselho Regional de Odontologia do CearÃ, foram selecionados por sorteio e nÃo foram identificados ao operador dos experimentos. A terapia teve como fotossensibilizador a eritrosina 22 ÂM (P), associada à irradiaÃÃo com LED de 520 nm, a 38 J/cm2 (L). Cinquenta espÃcimes de cada laboratÃrio foram distribuÃdos em 5 grupos (n:10): controle positivo (padrÃo ouro), estÃril em Ãxido de etileno (EO); controle negativo (P-L-), sem tratamento; controle (P+L-) apenas corado com eritrosina; controle (P-L+) apenas irradiado com LED 520 nm; experimental (P+L+). Os espÃcimes foram colocados em tubos individuais contendo soluÃÃo salina e agitados para desprendimento microbiano. A suspensÃo obtida foi diluÃda e plaqueada em Ãgar Sangue, Sabouraud Dextrose e CHROMagar OrientationÂ, para incubaÃÃo em 48 horas a 37ÂC. O nÃmero de unidades formadoras de colÃnias (UFC) bacterianas e fÃngicas viÃveis foi obtido, para comparaÃÃes entre os grupos. Foram realizados os testes estatÃsticos de Kruskal-Wallis e Dunn, que determinaram diferenÃa significante entre os grupos (P-L-) e (P+L+) (p<0,0001). Foi identificada contaminaÃÃo inicial com diversos micro-organismos nos seis laboratÃrios, como Enterococcus spp., Pseudomonas spp., Staphylococcus aureus, Klebsiella, Escherichia coli e Staphylococcus saprophyticus. As leveduras viÃveis foram eliminadas totalmente apÃs a TFD para os laboratÃrios L1, L2, L4 e L5. No laboratÃrio L3, a contagem de leveduras viÃveis foi reduzida, em 97% apÃs a TFD, enquanto que no L6, a reduÃÃo foi de 94%. As bactÃrias viÃveis foram eliminadas em 100% nos laboratÃrios L1, L2, L4 e L5. Nos laboratÃrios L3 e L6, a eliminaÃÃo das bactÃrias viÃveis foi de 99%. A TFD foi bastante eficaz na eliminaÃÃo microbiana das superfÃcies dos espÃcimes de resina acrÃlica.
12
Noroozi, Mehdi. "Self-reported penicillin allergy and dental implant therapy outcome, a clinical retrospective study." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/53977.
Full textAbstract:
Objectives: The histologic, clinical, and radiographic findings together indicated infection as a major etiology of implant failure. Antibiotics have been prescribed following implant surgery to control infection. Inability to take penicillin seems to be a determining factor in implants failure in particular, with certain types of implant-related procedures. The aim of this study was to investigate retrospectively whether self-reported allergy to penicillin contributes to higher rate of implant failure. Methods: The survival of 5576 implants (985 Nobel Biocare and 4591 Straumann) placed surgically by an experienced periodontist was assessed in patients with the age range of 20-89 (mean: 60 years old) and with the follow-up period of up to 10 years. 4132 implants followed for at least one year. The survival was defined as the implant remaining in the jaw. Pearson χ2 test and Logistic regression were applied to examine the relation between pairs of variables. All tests were 2-tailed with a significance level of 0.05. Results: Out of 5106 implants placed for patients taking penicillin, 0.8% failed, while out of 470 implants placed for patients with self-reported allergy to penicillin, 2.1% failed with statistically significant difference (P= 0.002). Odds of failure for implants placed in patients allergic to penicillin were 3.2 times higher than those for non-allergic patients while controlling for the other variables. Kaplan Meier test revealed statistically significant difference between survivals of implants placed in penicillin-allergic group compared with non-allergic group. 54% of implant failures in non-allergic group have occurred during the first 6 months of implant insertion, while in penicillin allergic group this amount was 80% with statistically significant difference. Immediate implant placement in fresh extraction socket had 10-times higher rate of failure in patients with self-reported allergy to penicillin. Significant association between smoking and implant failure was found (p=0.005). Implants in the area of second molars have the highest failure rate with more frequency in maxilla relative to mandible. Conclusion: Inability to take penicillin may contribute to higher rate of implant failure and thus, penicillin allergy test could be implemented in clinical settings to increase the likelihood of prescribing penicillin relative to its alternates.Dentistry, Faculty of
Graduate
13
Fu, Yongji. "Using optical methods to monitor and administer photodynamic therapy to oral bacteria /." Full text open access at:, 2008. http://content.ohsu.edu/u?/etd,619.
Full text
14
Wateska, Joseph Anthony. "Mutagenicity of root canal sealer RSA Roekoseal Automix in the Ames test." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=1912.
Full textAbstract:
Thesis (M.S.)--West Virginia University, 2001.Title from document title page. Document formatted into pages; contains xi, 61 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 34-37).
15
Giordano, Ana Bárbara. "MINIMALLY INVASIVE DENTAL STRATEGIES FOR BONE REGENERATION AND ENDODONTIC TREATMENTS." Doctoral thesis, Universitat Internacional de Catalunya, 2021. http://hdl.handle.net/10803/671094.
Full textAbstract:
Nowadays, the most common solution to maintain the teeth of patients that have suffered from a traumatism or a profound caries
and have ended with root canal infection is to perform a root canal treatment. For this purpose, Gutta-percha (GP) is one of the
main materials used to fill root canals, presenting excellent biocompatibility and good sealing ability. However, GP poor bonding
ability to dental tissues has led to high failure rates in endodontic treatments. To address these challenges, many studies have
performed research to revise GP. Among the strategies that are being explored as novel endodontic materials, bioactive elements
are a promising strategy to improve root canal treatments. For instance, silica based microspheres (SiMS) are an example of
bioactive elements that present an active surface and chemical composition that may provide a stronger adhesion to dentin tissue,
biocompatibility and the possibility to serve as a possible drug delivery system.
In the cases in which the patient presents a more advanced dental pathology, which has led to bone loss surrounding the tooth,
the treatment of choice is bone regeneration through a natural bone graft. This is the best option since it presents the same
composition as the bone, containing cells with osteogenic potential and growth factors that stimulate cells differentiation into
osteoblasts, among others. Nevertheless, this type of grafts present some drawbacks, such as pain, risk of infection, possible
disease transmission and limited availability. For this reason, synthetic bone grafts research is one of the main proposals in
regenerative medicine. This branch of medicine is based on the development of new biomaterials with the objective of increase
the bone healing capacity and, more specific in the dentistry field, to prevent or eliminate bacterial infections at the same time.
The present thesis is divided in two parts: i) a treatment focused on the dental system and ii) a treatment focused on the bone
system. The first part presents the fabrication of a biomaterial to enhance the GP sealing ability and its bonding capacity with the
dental tissue in endodontic treatments; in the second part, two strategies to improve maxillary bone regeneration are presented:
the first one through the in vitro study of a low level laser to study its osteogenic effect and cellular proliferation; the second one
through the fabrication plus optimization of a biomaterial with a drug sustained release for its potential use as a synthetic bone
graft.
16
Tsang, Wing-keung Boyd, and 曾永強. "Effect of systemic antibiotics on clinical and patient-centered outcomes of implant therapy: preliminary dataanalysis." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B46960521.
Full textAbstract:
The use of antibiotics as prophylaxis against postsurgical infection has been propagated. However, in the field of oral implant dentistry, the use of systemic antibiotics remains a controversial issue, with various antibiotic regimens being advocated. The aims of this multi-center randomized clinical trial were to determine the effect of various systemic antibiotic prophylaxis regimens on patient-centered outcomes and perceptions, postsurgical complications in patients undergoing standard oral implant therapy.
In this preliminary study, 107 medically healthy adults who were consecutively admitted to 5 study centers for standard oral implant therapy were randomly assigned to one of the 4 groups (3 test and 1 control groups). Pre-operative antibiotics of 2 g amoxicillin 1 hour prior to standard implant placement were prescribed to test group 1 (positive control), post-operative antibiotics of 2g amoxicillin following implant placement for test group 2, and pre-operative antibiotics of 2g amoxicillin 1 hour prior to standard implant placement and 500mg three times daily on days 2 through 3 after standard implant placement for test group 3. The control group was given a placebo tablet of 2g 1 hour prior to standard implant placement without any antibiotics. Subjects were examined clinically by blinded examiners at 1 week, 2 weeks, 4 weeks and 8 weeks from implant installation for post-operative complications. In addition, Visual Analogue Scales (VAS) on pain, swelling, bruising and bleeding were obtained from the patients from Day 1 through Day 7 and 14.
From the results of this preliminary study, in standard single implant placement with non-submerged healing, the postoperative complications (Flap closure, Swelling, Pain, Suppuration and Implant stability) and patient-centered outcomes (VAS of bleeding, pain, swelling and bruising) will neither be affected by using antibiotics prophylaxis in different regimens nor not using antibiotics prophylaxis.
It should be reiterated that dental practitioners should be cautious when using antibiotics as a prevention of postoperative infection in dental implant therapy. The indiscriminate use of antibiotics will eventually lead to more serious consequences including allergy and the development of resistance strains.published_or_final_version
Dental Surgery
Master
Master of Dental Surgery
17
Martin, Patrick William. "Music listening : its effectiveness in reducing anxiety of patients undergoing minor dental procedures." Scholarly Commons, 1986. https://scholarlycommons.pacific.edu/uop_etds/2126.
Full text
18
Brittain, Roger. "Comparison of time taken and breakage of six different endodontic systems to prepare molar teeth." Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&.
Full textAbstract:
The purpose of this study was to determine duration time, breakage and apical displacement, whilst using six different endodontic filing systems to prepare molar teeth. A total of 96 molar teeth were used in the study, divided equally, ie 16 teeth per system selected randomly, totalling 48 canals per system. A standardised access cavity was prepared for all the teeth before selection. The canals were filed according to the manufacturers&rsquoguidelines. The result showed that PROTAPER®
, K3&trade
and the combination of: HERO Shaper®
, HERO Apical®
and Endoflare®
(Referred from hereon as HERO System for convenience) were statistically faster than PROFILE®
and FlexMaster®
, which were in turn faster than AETTM. Although breakage did occur in K3&trade
and HERO System this was not deemed statistically significant. Apical displacement occurred in the form of Type 1 in the AETTM, PROFILE®
and HERO System, but once again this was not statistically significant. It was concluded that more aggressive cutting features such as a positive rake
angle, pyramidal shaped tip, progressive taper and absence of radial lands, if present, could have enabled K3&trade
, HERO System and PROTAPER®
to have faster times, and in addition these features did not compromise these systems with regard to apical foramina transportation and breakage.
19
Kimura, Rui Yoshio. "Posttreatment stability of lip bumper therapy." Oklahoma City : [s.n.], 2002. http://library.ouhsc.edu/epub/theses/Kimura-Rui-Yoshio.pdf.
Full text
20
Hales, Jason J. "Development of antibiotic resistance due to chromosomal mutation caused by AH26 endodontic sealer." Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2304.
Full textAbstract:
Thesis (M.S.)--West Virginia University, 2002.AH26 is a registered trademark. Title from document title page. Document formatted into pages; contains vii, 55 p. : ill. (some col.). Includes a video file in the AVI format. Vita. Includes abstract. Includes bibliographical references (p. 48-53).
21
Witek, Thomas J. "Efficacy of four irrigation protocols in the debridement of small apical accessory canals." [Milwaukee, Wis.] : e-Publications@Marquette, 1997. http://epublications.marquette.edu/theses_open/1.
Full text
22
Cheung, Ho-ming Lisa. "C-shaped canal in human mandibular second molar." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B37486950.
Full text
23
Cheung, Ho-ming Lisa, and 張皓明. "C-shaped canal in human mandibular second molar." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B37486950.
Full text
24
Otero, Larnia María Antonella, and Guerrero Lizeth Aracely Ramos. "Eficacia de la Musicoterapia en la reducción de la ansiedad dental en niños con Necesidades Especiales durante la Atención Odontológica." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/651634.
Full textAbstract:
Objetivo: Evaluar la eficacia de la musicoterapia en la reducción de los niveles de ansiedad en los niños de 5 a 12 años de edad, con necesidades especiales durante la atención odontológica en el Centro Ann Sullivan del Perú.
Materiales y métodos: Estudio cuasi experimental. Se evaluó a 40 pacientes, los cuales fueron divididos aleatoriamente en 2 grupos: grupo de expuestos y no expuestos a musicoterapia. El nivel de ansiedad fue registrado por la escala de imagen facial antes y después de la atención clínica, el comportamiento durante la atención a través de la escala de Frankl y el nivel de ansiedad de los padres a través de la escala modificada de Corah. Asimismo, se registraron los cambios en las funciones vitales de ambos grupos antes y después de dicha atención.
Resultados: Se encontraron diferencias estadísticamente significativas en todos los valores de la presión arterial (sístole, p<0.001 y diástole, p=0.007) y frecuencia cardiaca final (p= 0.001) en ambos grupos. Los valores de las funciones vitales finales fueron menores en el grupo expuesto en contraste al grupo no expuesto. Se encontró diferencias estadísticamente significativas entre los niveles de ansiedad final en ambos grupos, observándose una proporción mayor de casos con niveles de ansiedad en el grupo no expuesto a musicoterapia. (p=0.001)
Conclusión: El empleo de la musicoterapia es eficaz en la reducción de los niveles de ansiedad durante la atención odontológica en pacientes con necesidades especiales.Objective: To evaluate the efficacy of music therapy in reducing anxiety levels in children with special needs between 5 and 12 years of age during dental attention at the Ann Sullivan Center of Peru. Materials and methods: This is a quasi-experimental study. 40 patients were randomly divided in two groups: exposed and not exposed to music therapy. The level of anxiety was registered using the Facial Image Scale before and after clinical attention, the patient behavior during the attention was measured by the Frankl Scale, and the level of anxiety of the was measured by the Modified Corah Scale. Likewise, the vital functions of both groups were registered before and after dental attention and the differences were evaluated. Results: Statistically significant differences were found in both blood pressure values (systole, p = 0.000 and diastole, p = 0.007) and final heart rate (p = 0.001). The values of the final vital functions were minors in the exposed group in contrast to the unexposed group. Statistically significant differences were found between the levels of final anxiety in both groups, with a higher proportion of cases of anxiety levels in the unexposed group (p = 0.001). Conclusion: The use of music therapy is effective in the reduction of anxiety levels during dental atention in pacients with special needs.
Tesis
25
Cecchini, Silvia Cristina Mafra. ""Desinfecção da Dentina Radicular pela Irradiação dos Lasers de Nd: YAG e Er: YAG: um Modelo "in vitro""." Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/23/23135/tde-30082001-094604/.
Full textAbstract:
RESUMO Desinfecção da dentina radicular pela irradiação dos lasers de ND:YAG, HO:YAG e ER:YAG: um modelo in vitro A provável causa do insucesso da terapia endodôntica é a persistência de microrganismos colonizando os túbulos dentinários. Para reduzir o risco de insucesso e, se possível, o tempo despendido no tratamento endodôntico, novos equipamentos e materiais são constantemente desenvolvidos. O objetivo desta investigação foi estudar o efeito da irradiação laser intracanal na desinfecção dos túbulos dentinários de dentes bovinos recém-extraídos, utilizando-se um modelo in vitro. Os grupos irradiados pelos vários lasers foram comparados ao tratamento com hidróxido de cálcio, freqüentemente utilizado como medicação intracanal. O cemento radicular foi removido, o canal preparado e os dentes, cortados, resultando em 180 corpos de prova padronizados. Para promover a colonização bacteriana, os corpos de prova foram incubados, a 37 o C, em frascos contendo caldo de tripticase de soja e Enterococcus faecalis, o qual continha um plasmídeo que permitiu o seu crescimento em um meio seletivo com cloranfenicol. Os corpos de prova foram divididos em cinco grupos experimentais e três grupos-controle. Para irradiação foram utilizados os lasers pulsados de: Ho:YAG a 2,1 µm; Nd:YAG (1,06 µm); e Er:YAG (2,94 µm) com e sem refrigeração ar/água. Os grupos tratados receberam três parâmetros diferentes de irradiação com cada tipo de laser: energia abaixo do limiar de modificação física (physical modification threshold - ½ do PMT) por 60s; no limiar (PMT) por 60s; e, acima do limiar (120s). O Grupo 5 recebeu sete dias de tratamento com hidróxido de cálcio. Como controles, três espécimes para cada grupo receberam água estéril (controle negativo), três receberam KI3, após exposição à bactéria (controle negativo) e três não receberam tratamento após exposição à bactéria (controle positivo). A quantidade de bactérias foi estimada mediante a contagem de unidades formadoras de colônias (u.f.c.). De modo a avaliar, paralelamente, se os comprimentos de onda laser utilizados no experimento poderiam ser absorvidos pelo E. faecalis, foram obtidos espectros de absorção no UV, VIS e IR, por meio de espectroscopia. A análise estatística mostrou uma redução bacteriana como segue: Ho:YAG > hidróxido de cálcio > Nd:YAG > Er:YAG com refrigeração ar/água > Er:YAG sem refrigeração ar/água. Houve uma significativa redução bacteriana no grupo irradiado pelo Ho:YAG no limiar de modificação PMT (50 mJ, 10 Hz, 66 J/cm 2 , por 120s), seguida pelo Ho:YAG a 50 mJ, 10 Hz, 33J/cm 2 , por 60s e pelo grupo que recebeu hidróxido de cálcio. Os dois últimos grupos não apresentaram diferenças estatísticas significativas. O espectro de absorção pelas bactérias (E. faecalis) nas faixas dos comprimentos de onda do UV e VIS apresentou picos de absorção em 361 nm e em 377 nm (UV). Já o infravermelho próximo revelou uma baixa absorção pelo microrganismo testado.SUMMARY Disinfection of intracanal dentin by Nd:YAG, Ho:YAG and Er:YAG laser irradiation: an in vitro model A possible cause for root canal failure is the persistence of bacteria that have colonized dentinal tubules. To reduce this risk and, if possible, to also shorten the time-consuming endodontic therapy, new equipment and materials are constantly being introduced. The aim of the present investigation was to study the effect of disinfection of dentinal tubules by intracanal laser irradiation using an in vitro model. The groups irradiated by various lasers were compared with calcium hydroxide, a material frequently used as intracanal medication between appointments. Freshly extracted, intact bovine incisors were used. The root cementum was removed and the teeth cut to produce 180 standardized specimens. For bacterial colonization, specimens were incubated at 37 o C in test tubes with Tryptic Soy Broth and Enterococcus faecalis, which carried a plasmid that allowed the growth in a selective medium containing chloramphenicol. The specimens were divided in five treatment groups and three control groups. For irradiation, pulsed delivered Ho:YAG laser at 2.1 µm, Nd:YAG laser (1.06 µm), and Er:YAG and Er:YAG laser (2.94µm) with and without air/water coolant, were used. Lasers groups received three different laser settings for treatment: output energy below the physical modification threshold (½ of PMT) for 60 sec, at the PMT for 60 sec and above the PMT (120 sec). Group 5 received a seven-day treatment with calcium hydroxide. As controls, three specimens for each treatment group received sterile water instead of bacteria (negative control), three received iodine potassium-iodide after bacterial exposure (negative control), and three did not receive treatment after bacterial exposure (positive control). The number of bacteria was estimated by counting CFU. In order to evaluate whether the lasers used in the experiment could be absorbed by the bacteria E. faecalis, an UV, VIS and NIR spectra were obtained using a spectrophotometer. Statistical analysis showed the bacterial reduction as follow: Ho:YAG laser > hidróxido de cálcio> Nd:YAG laser > Er:YAG laser with air/water coolant > Er:YAG laser without air/water coolant. There was a significantly higher bacterial reduction in the group irradiated by the Ho:YAG at the PMT (50mJ, 10 Hz, 66 J/cm 2 for 120 sec), followed by Ho:YAG irradiated at 50mJ, 10 Hz, 33 J/cm 2 for 60 sec, and the group that received calcium hydroxide. The latter two groups were not significantly different. The UV and VIS absorbance spectrum presented two absorbance peaks at 361nm and 337nm (UV). The NIR spectrum revealed a very low absorbance by the E. faecalis.
26
Farias, Sofia Sampaio de Sousa. "Efeito da terapia fotodinâmica antimicrobiana no controle do biofilme dental cariogênico in vitro." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/58/58135/tde-15032016-140709/.
Full textAbstract:
O objetivo deste estudo foi avaliar o efeito da terapia fotodinâmica antimicrobiana (TFDa), utilizando laser de baixa potência, em duas densidades de energia, associado ao azul de toluidina em biofilme de S. mutans. Biofilmes de S. mutans UA159 foram crescidos por 5 dias em discos de resina acrílica (3 mm de diâmetro x 2 mm de altura) a 37ºC 5 % de CO2;. Os espécimes foram divididos aleatoriamente em 4 grupos de tratamento (n=3): Digluconato de clorexidina 0,12% (CHX, controle positivo); Solução salina a 0,89% (NaCl, controle negativo); Terapia fotodinâmica antimicrobiana com azul de toluidina e laser de baixa potência (densidade de energia 320 J/cm²) (TFDa 320); Terapia fotodinâmica antimicrobiana com azul de toluidina e laser de baixa potência (densidade de energia 640 J/cm²) (TFDa 640). Os tratamentos foram realizados 2x/dia durante 3 dias. Ao final dos 5 dias, os biofilmes foram coletados e número de bactérias viáveis e a concentração de polissacarídeos extracelulares insolúveis (PECI) e intracelulares (PIC) foram determinadas e analisadas estatisticamente (ANOVA e teste de Tukey, p < 0,05). O tratamento com a TFDa (320 e 640 J/cm²) reduziu o número de bactérias viáveis em biofilmes de S. mutans, de uma maneira dose-dependente (p < 0,05). Além disso, a TFDa 640 J/cm², reduziu a viabilidade bacteriana de forma tão eficaz quanto a CHX (p > 0,05). Em relação a PECI e PIC, os grupos TFDa (320 e 640 J/cm²) não foram significativamente diferentes de CHX (p > 0,05). Os resultados mostraram que a terapia fotodinâmica antimicrobiana, mediada pelo azul de toluidina e laser de diodo (640 J/cm²), pode ser uma abordagem utilizada no controle do biofilme dental cariogênico.The aim of this study was to evaluate the effect of antimicrobial photodynamic therapy (aPDT), using low-power laser, with two energy densities, associated with toluidine blue in S. mutans biofilm. S. mutans UA159 biofilms were grown for 5 days on acrylic resin discs (3 mm diameter x 2 mm height) a 37ºC, 5 % de CO2. The specimens were randomly divided into 4 treatment groups (n = 3): 0.12% chlorhexidine digluconate (CHX, positive control); 0,89% Saline (NaCl, negative control); Antimicrobial photodynamic therapy with toluidine blue and low power laser (energy density of 320 J/cm²) (aPDT 320); Antimicrobial photodynamic therapy with toluidine blue and low power laser (energy density of 640 J/cm²) (aPDT 640). Treatments were performed 2x/day for 3 days. At the end of 5 days, the biofilms were collected and the number of viable bacteria and the concentration of insoluble extracellular (IEPS) and intracellular polysaccharides (IPS) were determined and analyzed statistically (ANOVA and Tukey\'s test, p<0.05). Treatment with aPDT (320 and 640 J/cm²) reduced the number of viable bacteria of S. mutans biofilms in a dose-dependent manner (p<0.05). Furthermore, the aPDT 640 group reduced the bacterial viability as effectively as CHX group (p>0.05). For IEPS and IPS, the aPDT groups (320 and 640 J/cm²) were not significantly different CHX (p>0.05). The results showed that the antimicrobial photodynamic therapy mediated by toluidine blue and diode laser (640 J/cm²) may be an approach used to control the cariogenic dental biofilm.
27
Criser, Gavin L. "The effect of cannula design upon apically extruded sodium hypochlorite during endodontic therapy." Morgantown, W. Va. : [West Virginia University Libraries], 2010. http://hdl.handle.net/10450/11205.
Full textAbstract:
Thesis (M.S.)--West Virginia University, 2010.Title from document title page. Document formatted into pages; contains iii, 29 p. : col. ill. Includes abstract. Includes bibliographical references (p. 24-29).
28
Blomlöf, Johan. "Root surface conditioning in periodontal treatment /." Stockholm, 1997. http://diss.kib.ki.se/1997/91-628-2646-8.
Full text
29
Hughart, Donald Wayne. "Comparison of the sealing ability of two different types of root canal obturation cold lateral compaction and the continuous wave compaction technique /." Morgantown, W. Va. : [West Virginia University Libraries], 2004. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3348.
Full textAbstract:
Thesis (M.S.)--West Virginia University, 2004.Title from document title page. Document formatted into pages; contains xi, 56 p. : ill. Vita. Includes abstract. Includes bibliographical references (p. 41-44).
30
Giro, Gabriela [UNESP]. "Avaliação radiográfica e biomecânica da influência da osteoporose induzida em ratas, e seu tratamento com alendronato e estrógeno, sobre o tecido ósseo ao redor de implantes com osseointegração estabelecida." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/96208.
Full textAbstract:
Made available in DSpace on 2014-06-11T19:28:03Z (GMT). No. of bitstreams: 0
Previous issue date: 2006-03-24Bitstream added on 2014-06-13T20:36:53Z : No. of bitstreams: 1
giro_g_me_arafo.pdf: 376478 bytes, checksum: 41b9f6bee6825f87f572627898751b2f (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Universidade Estadual Paulista (UNESP)
O presente estudo teve como objetivo avaliar a influência da deficiência de estrógeno promovida pela ovariectomia (OVX) sobre o tecido ósseo ao redor de implantes com osseointegração estabelecida. Foram utilizadas ratas Wistar, com idade aproximada de 60 dias e peso variando entre 180g a 220g, submetidas à colocação de um implante na metáfise tibial. Os tratamentos utilizados foram eficientes na prevenção da perda óssea. Os animais que receberam a administração do alendronato apresentaram os melhores resultados para todas as análises realizadas. A deficiência de estrógeno decorrente da OVX acarretou prejuízos para a BMD, densidade radiográfica da região de osso medular e torque de remoção dos implantes. Esse quadro pôde ser revertido com a utilização dos tratamentos instituídos, com o alendronato apresentando os melhores resultados.
The aim of the present study was to evaluate the influence of estrogen deficiency due to ovariectomy (OVX) on the bone around osseointegrated titanium implants. Wistar female rats - approximately 60 days old, weighting from 180 to 220 g - were used. Digital radiographs were taken and the implants were submitted to the removal toque. The results showed a negative effect of the OVX on the BMD at the femur and lumbar regions, on the radiographic bone density at the cancellous bone and on the biomechanical characteristics of the bone tissue around the implants. The treatments were efficient preventing bone loss. The animals that received alendronate therapy showed the best results for all the analyzed variables. we can conclude that the estrogen deficiency due to OVX had a negative influence on the BMD, on the radiographic bone density at the cancellous bone and on the removal torque of the implants; however, such negative influence can be reversed with the adopted therapies, among which the alendronate seemed to be the best method for prevention and treatment of bone loss due to OVX.
31
Hallbäck, Viktoria, and Celina Forsman. "Bakgrundsfaktorer till tandvårdsrädsla och kognitiv beteendeterapi som behandlingsmetod : En litteraturöversikt av svenska forskningsresultat." Thesis, Jönköping University, Hälsohögskolan, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-49311.
Full textAbstract:
Syfte: Syftet med litteraturöversikten var att utifrån svenska forskningsresultat kartlägga bakomliggande faktorer till tandvårdsrädsla och undersöka vilken effekt kognitiv beteendeterapi (KBT) har på tillståndet. Metod: Sökningen efter svenska vetenskapliga artiklar har gjorts genom Dentistry of Oral Sciences, MEDLINE och CINAHL. Artiklar skrivna under de senaste tio åren har valts. Både kvalitativa och kvantitativa artiklar har använts, samt har kvalitetsgranskats utefter två mallar. Resultat: Underliggande faktorer för utveckling av tandvårdsrädsla inkluderar tidigare negativa tandvårdssituationer, tandvårdsrädsla i familjen, kön, ålder, temperament, allmän ångest och depression, låg socioekonomisk ställning, låg inkomst, rökning, oral smärta, utbildningsnivå och Hyperaktivitetssyndrom (ADHD). KBT-behandling har visat sig vara mycket effektiv när det gäller att behandla tandvårdsrädsla. Slutsats: Det har visats att tandvårdsrädsla utvecklas tidigt i livet och kan vidmakthållas. Det finns flertalet faktorer som bör ses över och om behandling sätts in i sig kan man potentiellt förbättra hälsan hos individen med tandvårdsrädsla. KBT har visat sig vara en mycket framgångsrik behandling för tandvårdsrädsla, då det har en bevisad långvarig effekt.Aim: The aim of the literature review was to map underlying factors of the development of dental anxiety and investigate the effect cognitive behavioral therapy (CBT)has on the condition, based on Swedish research results. Method: This was a literature review over Swedish studies. The search for scientific articles has been done through the databases Dentistry of Oral Sciences, MEDLINE and CINAHL. Articles written for the past ten years were chosen. Both qualitative and quantitative articles have been used and reviewed with quality templates. Results: Factors for developing dental fear include previous negative dental experiences, dental fear within the family, gender, age, temperament, general anxiety, depression, low socioeconomic standard, low income, smoking, oral pain, education level and for people with attention deficit hyperactivity disorder (ADHD). CBT treatment has shown to be very effective in treating dental anxiety. Conclusion: It has been shown that dental fear develops early in life and can be perpetuated. There are a number of factors that should be considered, and if treatment is initiated the health of the individual with dental fear can potentially be improved. CBT has been proven to be a very successful treatment for dental care, as it has a long-lasting effect.
32
Wei, Xi. "Comparison of three nickel-titanium instruments and the step-down technique for preparing curved root canals." Click to view the E-thesis via HKUTO, 2000. http://sunzi.lib.hku.hk/HKUTO/record/B38628077.
Full text
33
韋曦 and Xi Wei. "Comparison of three nickel-titanium instruments and the step-down technique for preparing curved root canals." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B38628077.
Full text
34
Crisci, Fernando Simões. "Efeito do laser de baixa intensidade na polpa e nos tecidos apicais e periapicais em dentes de macaco /." Araraquara : [s.n.], 2008. http://hdl.handle.net/11449/101654.
Full textAbstract:
Orientador: Lizeti Toledo de Oliveira RamalhoBanca: Fábio Luiz Camargo Villela Berbert
Banca: Welingtom Dinelli
Banca: Manoel Damião de Souza Neto
Banca: Antônio Miranda da Cruz Filho
Resumo: O presente estudo avaliou o efeito do laser de baixa intensidade diodo semicondutor de arseneto de gálio e alumínio em exposições pulpares induzidas e nos tecidos apicais e periapicais após tratamento endodôntico em dentes de macacos. Nas exposições pulpares, foi avaliado efeito do laser infra-vermelho associado ao hidróxido de cálcio, variando o tempo de aplicação, onde utilizou-se quatro macacos, totalizando 24 dentes, distribuídos em quatro grupos experimentais: Grupo I: Laser 2,5 segundos (dentes incisivos), Grupo II: Laser 40 segundos (dentes incisivos), Grupo III: Laser 40 segundos (dentes prémolares) e Grupo IV: Controle sem Laser (dentes pré-molares), por um período de 55 dias. Quanto ao efeito do laser sobre a agressividade tecidual do cimento endodôntico óxido de zinco e eugenol (OZE), após tratamento endodôntico nos tecidos apicais e periapicais, foi comparando o laser vermelho com o infravermelho, utilizando quatro macacos, totalizando 24 dentes, distribuídos em três grupos experimentais: Grupo I (Laser Vermelho), Grupo II (laser Infra-Vermelho) e Grupo III (Controle: Sem Laser), por um período de 22 dias. Decorrido os períodos experimentais de cada estudo, os animais foram mortos, os dentes ou peças removidas e preparadas para análise histológica. De acordo com a proposta e as condições específicas deste trabalho, os resultados nos permitem concluir que nas exposições pulpares, a irradiação com laser infra-vermelho (40 segundos) diminuiu a reação inflamatória e induziu a organização tecidual, bem como na formação da barreira mineralizada, apresentando diferenças estatísticas significantes entre os grupos (p<0,05), tendo como melhor resultado a irradiação com laser infra-vermelho (40 segundos), já nos tecidos apicais e periapicais a irradiação... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The present study evaluated the effect of the laser of low intensity diode semiconductor of gallium aluminum arsenide in exposed pulp induced in apical and periapical tissues after endodontic treatment in teeth of monkeys. In the exposed pulp, the effect of the laser infra-red associated to the hydroxide of calcium was evaluated varying the time of application, being used 04 monkeys, totaling 24 teeth, distributed in four experimental groups: Group I: Laser 2,5 seconds (incisive teeth), Group II: Laser 40 seconds (incisive teeth), Group III: Laser 40 seconds (premolar teeth) and Group IV: Control without Laser (premolar teeth), for a period of 55 days. As for the effect of the laser on the tissue aggressiveness of the endodontic zinco oxide and eugenol (OZE) sealer, after endodontic treatment o in the apical and Periapical tissues, the red laser was compared with the laser infra-red, using 04 monkeys, totaling 24 teeth, distributed in 03 experimental groups: Group I (Red Laser), Group II (Infra-red laser) and Group III (it Controls: Without Laser), for a period of 22 days. After the experimental periods of each study, the animals were killed, the teeth or pieces were removed and prepared for histological analysis. In agreement with the proposal and the specific conditions of this study work, the results allow to conclude us that in exposed pulp infra-red laser irradiation (40 seconds.) reduced the inflammatory reaction and induced the tissue organization, as well as the mineralized barrier formation and in apical and periapical tissues infra-red laser irradiation stimulated the cells of the periodontal tissue inducing periapical repair.
Doutor
35
Barney, Jason Phillip. "An in-vitro study evaluating the efficacy of the Ultrasonic Bypass System using different intracanal irrigating solutions." Connect to resource online, 2010. http://hdl.handle.net/1805/2225.
Full textAbstract:
Thesis (M.S.D.)--Indiana University School of Dentistry, 2010.Title from PDF t. p. (viewed July 28, 2010) Advisor(s): Mychel Vail, Chair of the Research Committee, Joseph Legan, B. Keith Moore, Kenneth Spolnik, Susan Zunt. Curriculum vitae. Includes abstract. Includes bibliographical references (leaves 93-109).
36
Svensson, Hanna, and Ida Eriksson. "Oral motor therapy with palatal plates in children with Down syndrome - A systematic review." Thesis, Malmö högskola, Odontologiska fakulteten (OD), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-19737.
Full textAbstract:
Syfte: Syftet med denna studie var att utvärdera effekten av stimulerande gomplattor på den orala motoriken hos barn med Downs syndrom. Studien syftar också till att undersöka om behandlingen är kostnadseffektiv.Material och Metod: Studien är en systematisk litteraturstudie enligt PRISMAs kriterier och artiklarna kvalitetsgranskades med hjälp SBU: s handbok. De databaser som användes för litteratursökningen var PubMed, Cochrane Library, Scopus och CINAHL.Resultat: Screeningen av 107 unika artiklar resulterade i 14 relevanta publikationer. Kvaliteten på artiklarna var överlag låg och 9 artiklar bedömdes måttlig risk för bias och 5 artiklar bedömdes ha hög risk för bias. Alla 14 inkluderade artiklar visade en positiv effekt på minst en orofacial variabel men det finns ingen konsensus gällande utvärderingsmetoder för behandling med gomplattor, behandlingstider eller vilka orofaciala variabler som bör undersökas.Slutsats: I denna litteraturgenomgång identifierades ett antal studier, som undersökte effekten av behandling med stimulerande gomplattor. På grund av att artiklarna använde icke standardiserade metoder, hade olika behandlingstider och använde olika variabler för att mäta effekten, kan ingen slutsats dras från dessa studier. Fler RCT studier med större grupper av barn och standardiserade metoder för utvärdering behövs.Aim: The aim of this study was to evaluate the effect of treatment with stimulating palatal plates on the oral motor function in children with Down syndrome. The study also aims to investigate if the treatment is cost-effective.Material and Method: The study is a systematic review made according to the PRISMA criteria. The articles were quality reviewed using Swedish Agency for Health Technology Assessment and Assessment of Social Services - SBU’s manual. The databases used for the literature search were PubMed, Cochrane Library, Scopus and CINAHL.Result: Screening of 107 unique papers resulted in 14 eligible publications. The quality of the articles was overall low. Nine articles were rated moderate risk of bias and 5 articles were rated high risk of bias. All 14 included articles showed a positive effect in one or more aspects on oral motor function but there is no consensus regarding evaluation methods for treatment with palatal plates, treatment times or which orofacial variables that should be investigated. No meta-analysis was made due to the lack of consensus.Conclusion: This literature review identified a number of studies, which investigated the effect of treatment with stimulating palatal plates. Due to the unstandardized methods, different treatment times, and different orofacial measuring variables, no consensus can be drawn from these studies. More RCT studies with larger groups of children and standardized methods for evaluation are required.
37
Cheung, Shun-pan Gary. "Low-cycle fatigue of nickel-titanium rotary root-canal instruments /." View the Table of Contents & Abstract, 2006. http://sunzi.lib.hku.hk/hkuto/record/B36666671.
Full text
38
Massi, Santiago [UNESP]. "Análise física química e mecânica de um cimento experimental à base de MTA." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/95394.
Full textAbstract:
Made available in DSpace on 2014-06-11T19:27:45Z (GMT). No. of bitstreams: 0
Previous issue date: 2010-03-31Bitstream added on 2014-06-13T18:56:26Z : No. of bitstreams: 1
massi_s_me_arafo.pdf: 223224 bytes, checksum: 277dcea4e6af26233b5a8ab30ff054dd (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Modificações têm sido propostas ao MTA e cimento Portland para a obtenção de um cimento obturador de canal radicular. Um material experimental à base de MTA (CE-MTA) é avaliado neste estudo para emprego como cimento endodôntico, contendo cimento Portland, radiopacificador, aditivos e veículo. Assim, o objetivo deste estudo foi avaliar o cimento experimental, usando como parâmetros comparativos o cimento AHPlus (AHP), MTA-Angelus (MTA) e cimento Portland (CP). Foram realizados testes de tempo de presa; resistência à compressão; escoamento; radiopacidade; alteração do pH e liberação de íons cálcio. Todas as metodologias foram definidas usando como referência normas ISO e a literatura científica recente da área endodôntica. O teste de escoamento seguiu a metodologia proposta pela norma ISO, com a medição do diâmetro dos discos de cimento, assim como da área por meio de um programa de imagens. O tempo de presa foi avaliado pela norma da ADA/ASTM, verificando os períodos de tempo necessários para que as agulhas indentadoras (100g e 2mm de diâmetro na ponta; e 456g e 1 mm de diâmetro na ponta) não marcassem a superfície dos discos de cimento, fornecendo resultados para a presa inicial e final. No teste de radiopacidade foi feita uma comparação da radiopacidade de discos de cimento de 10mm de diâmetro e 1 mm de espessura, com uma escala de alumínio padronizada. A alteração de pH do foi avaliada com um pHmetro e a liberação de cálcio com um espectrofotômetro de absorção atômica. Para ambos os ensaios tubos preenchidos com o cimento foram imersos em frascos contendo água destilada. Os tubos foram passados para um novo frasco contendo mais água destilada nos períodos de tempo de 3, 6, 12, 24 e 48 horas, assim como 7, 14 e 28 dias. O líquido remanescente nos frascos foi avaliado para obter os resultados deste ensaio. Na resistência à compressão...
Modifications of MTA and Portland cement has been proposed to obtain an root canal sealer. This study evaluates an experimental MTA based root canal sealer (CE-MTA) which contains Portland cement, radiopacifier, addictives and a vehicle. The aim of this study was to evaluate the experimental endodontic sealer, using white Portland cement (CP), MTAAngelus(MTA) and AH Plus (AHP) as control groups. The tests realized were: setting time, radipacity, compressive strength, pH alterations, calcium release and flow. The flow test followed the ISO 6876 norms, and the the sealer discs’ area was measured with a paquimeter and using an area measurement software. The setting time was measured based on the ADA/ASTM Norm, allowing initial and final setting time measurements. Radiopacity was measured using an aluminum scale as reference and sealer discs with 10 mm in diameter by 1 mm thick. The pH was measured using a pHmeter and the calcium release using an atomic absorption spectrophotometer. For compressive strength test the ISO 9917 methodology was used, testing specimens at 24 hours and 21 days. All the data was submitted to statistical analysis, a normality test, and after the data normality check, an ANOVA and a Tukey test using 5% significance were applyed. Results: The results showed that CE-MTA has flow similar to AH Plus and superior to the minimum required by the ISO standard. The setting time was faster than AH Plus and slower than MTA and Portland cement. The compressive strength was lower for the experimental sealer at 24 hours time compared with all the tested materials, and similar for the experimental sealer and MTA at 21 days. The experimental sealer had a superior calcium release in all period of time, and higher pH values until 48 hours period, being similar to MTA and Portland cement on posterior time periods. The experimental sealer radiopacity was lower... (Complete abstract click electronic access below)
39
Gomes, Fernando Vacilotto. "Reparo ósseo perimplantar após LLTC em coelhos : esteriologia e MEV." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/85097.
Full textAbstract:
Estudos prévios sugerem que a laserterapia de baixa potência (LLLT) favorece o reparo ósseo perimplantar. Este estudo avaliou a influência da LLLT sobre o reparo ósseo perimplantar in vivo em 32 coelhos Nova Zelândia submetidos à exodontia do incisivo inferior esquerdo imediatamente seguida pela inserção de um implante osseointegrável. Os animais foram distribuídos aleatoriamente em quatro grupos: um grupo controle C (animais não irradiados) e três experimentais. Estes receberam 7 sessões de terapia laser (AsGaAl, infravermelho, 830 ηm, 50mW, CW), com intervalos de 48 horas. A dose de laser por sessão variou entre os grupos EI (10 J/cm²), EII (5 J/cm²) e EIII (20J/cm²). Os animais foram mortos e os espécimes preparados histologicamente para análise da superfície de contato entre osso e implante (BIC) e da área de neoformação óssea entre as espiras (BA), em esteriologia e Microscopia Eletrônica de Varredura (MEV). A concentração de cálcio na interface do tecido ósseo com o implante foi analisada por espectrometria de raios-X por dispersão de energia (EDS). Os resultados foram analisados estatisticamente. Para MEV, as médias de BIC foram significativamente maiores para os grupos EI (977,9 μm) e EIII (1021,1 μm), comparados a EII (761,5 μm) e C (807,8 μm). Em BA, EIII (122573,7 μm²) superou os valores de neoformação dos demais grupos. O EDS para concentração de cálcio não apresentou diferença entre os grupos. A análise de BIC por meio de esteriologia mostrou valores significativamente maiores para EIII (1045,3 μm) em relação aos demais grupos. Para a BA, os grupos EI (100068,3 μm²) e EIII (103934,5 μm²) mostraram grandezas significativamente maiores. O uso da LLLT, no protocolo descrito, influenciou positivamente o reparo ósseo perimplantar com aumento do contato do tecido ósseo com o implante principalmente na dose de 20 J/cm² por sessão, bem como maior volume ósseo neoformado entre as espiras.Previous studies suggest that the low level laser therapy (LLLT) has a favorable effect on perimplant bone healing. This study evaluates the LLLT influence over perimplant bone healing pattern in 32 New Zealand male rabbits which were subimitted to a lower incisor extraction followed by an osseointegrated implant immediated insertion. The animals were randomly divided into four groups of eight animals each: a control group C (non-irradiated animal) and three experimental groups. They received seven laser therapy sessions (GaAlAs, infrared, 830 nm, 50 mW, CW), every 48 hours. The LLLT per session dose ranged between the groups EI (dose – 10 J/cm²), EII (dose – 5 J/cm²) and EIII (dose – 20 J/cm²). The animals were killed and the specimens received histological preparation for bone implant contact analysis (BIC) and Bone Area evaluation (BA) among the implant threads, both steriology and Scanning Electron Microscopy (SEM). The calcium concentration in bone implant interface were analysed by Energy-Disperse X-Ray Spectroscopy (EDS). The results were statistically analyzed. For SEM results, the BIC’s mean were significantly higher for the irradiated groups EI (977,9 μm) and EIII (1021,1 μm) compared to EII (761,5 μm) and C (807,8 μm). For BA, EIII (122573,7 μm²) showed better values for bone neoformation compared to other groups. For EDS calcium concentration there was no significantly difference between groups. The steriology analysis showed significantly higher values for BIC in EIII (1045,3 μm) compared to the other groups. For BA, EI (100068,3 μm²) and EIII (103934,5 μm²) were significantly higher. In this laser protocol, the use of LLLT induced positively perimplantar bone repair specially due to the bone implant contact improvement (20 J/cm² per session dose), as well as, better bone area neoformation within treads.
40
Southern, Rodney George. "Comparison of the obturation density of resilon[TM] using cold lateral condensation and varying continuous wave of condensation techniques." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4683.
Full textAbstract:
Thesis (M.S.)--West Virginia University, 2006.Title from document title page. Document formatted into pages; contains vii, 47 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 35-38).
41
Cheung, Shun-pan Gary, and 張順彬. "Low-cycle fatigue of nickel-titanium rotary root-canal instruments." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B45015533.
Full text
42
Ozaki, Jansen. "Influencia do sistema adesivo na microdureza do cimento resinoso dual na cimentação de pinos pre-fabricados de fibra de vidro em diferentes profundidades." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289640.
Full textAbstract:
Orientador: Luis Alexandre Maffei Sartini PaulilloDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
Made available in DSpace on 2018-08-05T23:18:11Z (GMT). No. of bitstreams: 1 Ozaki_Jansen_M.pdf: 4599360 bytes, checksum: ecab3b09dc88aad3d46bc54a8a659ccb (MD5) Previous issue date: 2006
Resumo: Este trabalho teve como objetivo avaliar a dureza Knoop (KHN) de cimentos resinosos duais na cimentação de pinos de fibra de vidro com diferentes sistemas adesivos e profundidades do canal radicular. Para este estudo foram utilizados 48 incisivos bovinos que tiveram suas coroas seccionadas e as raízes tratadas endodonticamente. Para a restauração utilizando pino de fibra de vidro e os sistemas de cimentação as raízes foram aleatoriamente dividas em 6 grupos: Grupo 1: Single Bond (3M ESPE)/RelyX ARC (3M ESPE), grupo 2: ED Primer (Kuraray)/Panavia F (Kuraray), grupo 3: Single Bond (3M ESPE)/Panavia F (Kuraray), grupo 4: ED Primer (Kuraray)/RelyX ARC (3M ESPE), grupo 5: sem adesivo/RelyX ARC (3M ESPE) e grupo 6: sem adesivo/Panavia F (Kuraray). As raízes restauradas foram armazenadas por 48 horas sob abrigo da luz e seccionados longitudinalmente para se avaliar a KHN nas profundidades cervical, média e apical. Para a microscopia eletrônica de varredura (MEV) foram selecionadas e preparadas 4 hemi-raízes para se observar à qualidade da formação de tags de resina no interior dos túbulos. Os maiores valores de dureza foram encontrados no grupo 6 que não utilizou nenhum tipo de sistema adesivo, e não apresentou nenhuma diferença estatística significativa entre a profundidade média e apical. O grupo 4 apresentou os menores valores de KHN comparado aos demais grupos. O sistema adesivo frasco único para a técnica do condicionamento ácido total apresentou uma camada de lama dentinária na região do terço apical, nas demais regiões demonstrou formação homogênea de tags de resina. O cimento Panavia F apresentou a maior dureza KHN em relação ao Rely X ARC em todas as profundidades testadas e o sistema adesivo influenciou a microdureza KHN dos cimentos resinosos na cimentação de pinos pré-fabricados nas regiões mais profundas do canal radicular
Abstract: The purpose of this study was to evaluate the Knoop hardness (KHN) of dual cure resin cements used to bond fiber posts at different regions of root canal dentin. Forty eight extracted roots of bovine teeth were used. After root canal treatment they were randomly divided into six groups of 8 roots each. Fiber posts were inserted with two different adhesive systems and dual cure luting resin cements. Group 1: Single Bond (3M ESPE)/RelyX ARC/(3M ESPE), group 2: ED Primer (Kuraray)/Panavia F (Kuraray), group 3: Single Bond (3M ESPE)/Panavia F (Kuraray), group 4: ED Primer (Kuraray) RelyX ARC/(3M ESPE), group 5: no adhesive system/RelyX ARC/(3M ESPE) and group 6: no adhesive system/Panavia F (Kuraray). The fixed and bonded specimens were stored for 48 hours, sectioned longitudinally and Knoop hardness measured at coronal, medium and apical regions. Four root halves of each group was then processed for evaluation by SEM of resin tags formation in dentin. The highest KHN were obtained with group 6 that it didn't use adhesive system none, not presenting any significant difference among the medium and apical depth. The group 4 had the lowest KHN compared to the other groups. Conditioning of the root canal dentine with phosphoric acid and use one-bottle bonding systems gave a more uniform penetration of resin tags than observed after the use of ¿self-etching¿ adhesives. Dual cure resin cements used with different adhesive systems and the depth, influenced in the Knoop hardness, which was significantly reduced in the apical region. Panavia F resin cement showed the highest KHN means in all of the tested depths
Mestrado
Dentística
Mestre em Clínica Odontológica
43
Bačik, Radoslav. "Informační systém pro zubní kliniky." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2017. http://www.nusl.cz/ntk/nusl-318125.
Full textAbstract:
This master thesis describes the creation of an information system for small to medium-sized dental clinics. The application will consist of a planning module (pa- tient ordering), a card index (patient information), a diagnosis and therapies system (the system will intelligently recommend treatment based on a speci ed health condi- tion) and a storage module (overview of the material). Administration takes doctors 1 to 2 hours a day and the goal of our application is to save this time.
44
Irie, Milena Suemi. "Análise do potencial osteogênico e angiogênico do tecido pulpar fresco em associação às proteínas derivadas da matriz do esmalte através da expressão gênica e proteica." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/58/58132/tde-26092016-160148/.
Full textAbstract:
A regeneração óssea é um processo complexo que exige a atuação coordenada de vários sinalizadores bioquímicos para promover as diversas fases da angiogênese e osteogênese. Diversas pesquisas têm focado no entendimento da biologia molecular com o objetivo de promover e acelerar a regeneração do tecido ósseo. Este estudo avaliou o potencial osteogênico e angiogênico da polpa dentária (PD) fresca e o efeito das proteínas derivadas da matriz do esmalte (EMD) neste tecido, obtido imediatamente após a exodontia, sem isolamento e cultura destas células. Trinta e seis amostras foram utilizadas, cada uma constistuída de um pool de tecidos da polpa removidos de 2 dentes de um mesmo paciente. No grupo controle, as amostras foram inseridas em criotubo e mantidas por 20 minutos em temperatura ambiente. No grupo teste, foi realizada aplicação de EMD (Emdogain®) na proporção de 1:1 e também mantidas por 20 minutos em temperatura ambiente. Análise de expressão gênica de Runx2, Osterix, ALP, BSP, OPN, VEGF-A, FGF-2 foi realizada através da Reação da Transcriptase Reversa em Cadeia da Polimerase (qRT-PCR). As análises imunológicas foram realizadas pelo imunoensaio Multiplex Cytokine Profiling (Luminex) para níveis de OCN, OPN, EGF, Angiopoietina-2, BMP-9, FGF-1, FGF-2, VEGF-A, VEGFC, VEGF-D. Os dados obtidos foram analisados estatisticamente. Os genes BSP e OPN apresentaram níveis significativamente maiores (p < 0,05) no Grupo Controle. Em relação à Osterix e FGF-2, houve maior expressão (p < 0.05) no Grupo Teste. Nos genes Runx-2, ALP e VEGF-A, não foi possível observar diferenças significativas entre os grupos. Na análise imunológica, OCN e OPN apresentaram níveis significativamente maiores (p < 0,05) no Grupo Controle. Já os níveis de Angiopoietin-2, BMP-9, FGF-1, VEGF-C, VEGF-D, VEGFA e FGF-2 tiveram maior expressão (p < 0,05) no Grupo Teste. Para os níveis de EGF, não foi observada diferença estatística (p < 0,05) entre os grupos. De acordo com os achados deste estudo, a aplicação de EMD no tecido pulpar em modelo ex vivo, aumentou a expressão gênica e proteica relacionada ao processo angiogênico, podendo, portanto, favorecer a regeneração óssea. No entanto, ensaios clínicos são necessários para confirmar os achados deste estudo e para que esta proposta terapêutica seja validada.Bone regeneration is a complex process that requires coordinated biochemical signaling to promote the various stages of angiogenesis and osteogenesis. In order to promote and accelerate bone regeneration, many studies have focused on molecular biology knowledge of this process. This in vitro study investigated the angiogenic and osteogenic potential of fresh dental pulp tissue with or without enamel matrix derivative (EMD) stimulation through gene and protein expression. Thirty-six samples were obtained, each one composed by a pool of pulp tissue removed from 2 teeth of the same patient. In the control group, immediately after tooth extraction, dental pulp tissue was collected and inserted in cryotube and left 20 minutes at room temperature. In the test group, EMD was applied and left 20 minutes at room temperature. Gene expression of Runx2, Osterix, ALP, BSP, OPN, VEGF-A, FGF-2 was assessed by qRT-PCR. Immunological analysis of OCN, OPN, EGF, Angiopoietin-2, BMP-9, FGF-1, FGF-2, VEGF-A, VEGF-C and VEGF-D levels was performed by Multiplex Cytokine Profiling (Luminex). Test Group presented significantly lower mean levels of BSP and OPN than Control Group (p<0,05). Osterix and FGF-2 mean levels were higher (p<0,05) in Test Group than Control Group. Immunological analyisis showed that OCN and OPN mean levels were significant lower in Test Group (p<0,05). However, Test Group presented significantly higher mean levels of ANGIOPOIETINA-2 BMP-9, FGF-1, VEGF-C, VEGF-D, VEGF-A (p<0,05). EMD application in dental pulp tissue in ex vivo model increased gene and protein expression related to angiogenesis and can actuate in bone regeneration process. However, randomized clinical trials are required to confirm our findings and to validate this therapy approach.
45
Amorim, Cinthia Santos Miotto de. "Efeito de três intervenções de fisioterapia comparadas a tratamento odontológico em indivíduos com bruxismo: um ensaio clínico randomizado." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/5/5170/tde-06062017-101225/.
Full textAbstract:
Objetivos: Comparar o efeito de três intervenções de fisioterapia com tratamento odontológico na dor e sintomas, abertura mandibular, ansiedade, estresse, depressão, qualidade de saúde bucal e sono em indivíduos com bruxismo. Métodos: Noventa e seis indivíduos com dor e bruxismo do sono e vigília entre 18 e 60 anos de idade foram randomizados em quatro grupos: Grupo 1 (n=24) massoterapia e exercícios de alongamento muscular; Grupo 2 (n=24) terapia de relaxamento e imaginação; Grupo 3 (n=24) massoterapia, exercícios, relaxamento e imaginação e Grupo 4 (n=24) tratamento odontológico pela restauração direta. As variáveis primárias foram dor e sintomas, sendo a intensidade avaliada pela escala visual analógica e limiar de dor com dolorímetro; e abertura mandibular com paquímetro digital. As variáveis secundárias foram ansiedade avaliada com Inventário de Ansiedade Traço-Estado; estresse com Escala de Estresse Percebido; depressão com Inventário de Depressão de Beck; qualidade de saúde bucal com Perfil de Impacto de Saúde Bucal e sono com Índice de Qualidade de Sono de Pittsburgh. Todos os participantes foram avaliados antes, após seis semanas e dois meses das intervenções por avaliador cego. As intervenções de fisioterapia foram individualizadas por 40 minutos, duas vezes por semana, por seis semanas; e o tratamento odontológico incluiu duas sessões individuais, com intervalo de uma semana e duração de aproximadamente duas horas. O nível de significância estabelecido foi alfa=5%. Resultados: Após seis semanas, houve melhora com diferença significativa entre os Grupos 1, 2 e 3 e o Grupo 4 na dor muscular do masseter [Média da Diferença=2,3 / 2,7 / 5,5 (IC95%=0,2 a 4,4 / 0,9 a 4,4 / 3,8 a 7,2)], temporal anterior [Média da Diferença=2,6 / 2,1 / 5 (IC95%=0,5 a 4,7 / 0,1 a 4,1 / 3,2 a 6,7)], esternocleidomastóideo [Média da Diferença=3,3 / 4,2 / 6,1 (IC95%=1,6 a 4,9 / 2,6 a 5,8 / 4,6 a 7,5)] e trapézio superior [Média da Diferença=3,8 / 4,1 / 6,6 (IC95% = 2,1 a 5,5 / 2,3 a 5,5 / 5,4 a 7,7)]. Melhora similar foi encontrada nos sintomas de cefaleia, apertamento dentário e dificuldade de dormir, bem como no estado de ansiedade, estresse, depressão e qualidade de sono (p < 0,001). Os Grupos 2 e 3 melhoraram o traço de ansiedade e qualidade de saúde bucal e o Grupo 3 melhorou o limiar de dor do músculo trapézio superior e abertura mandibular, com diferença significativa comparados ao Grupo 4 (p < 0,05). Houve manutenção destas melhoras dois meses após as intervenções (p < 0,05), porém a melhora na qualidade de saúde bucal e aumento na abertura mandibular não se mantiveram nos Grupos 2 e 3 (p > 0,05), respectivamente. Conclusão: Os dados sugerem que as três intervenções de fisioterapia comparadas a tratamento odontológico reduzem a dor e sintomas e indicam melhora da ansiedade, estresse, depressão e qualidade de sono. Os resultados apontam que as intervenções de fisioterapia: isolada (terapia de relaxamento e imaginação) e combinada (massoterapia, exercícios, relaxamento e imaginação) melhoram a qualidade de saúde bucal; e somente a combinada aumenta o limiar de dor no músculo trapézio superior e abertura mandibular em indivíduos com bruxismoObjectives: To compare the effects of three different physical therapy interventions with dental treatment in the pain and symptoms, mandibular opening, anxiety, stress, depression, oral health and sleep in individuals with bruxism. Methods: Ninety-six individuals with pain and awake and sleep bruxism and 18-60 years old were allocated to the one of four groups: Group 1: massage and stretching exercises (n=24), Group 2: relaxation therapy and imagination (n=24), Group 3: massage, exercises, relaxation and imagination (n=24) or Group 4: dental treatment by the direct restoration (n=24). Primary outcomes included muscle pain and symptoms (intensity measured using a visual analogue scale and pain threshold with algometry) and mandibular opening (measured using a digital pachymeter). Secondary outcomes included anxiety (state-trait anxiety inventory), stress (perceived stress scale), depression (Beck depression inventory), oral health (oral health impact profile-14), and sleep quality (Pittsburgh sleep quality index). Outcomes were evaluated at baseline, 6 weeks and 2 months post-initial intervention by the blinded assessor. Physical therapy interventions included individual sessions that lasted 40 min biweekly for 6 weeks and dental treatment, two 2-h individual sessions conducted a week apart. The level of significance established was alfa=5%. Results: At 6 weeks after, the improvement with difference among Groups 1, 2, 3 and Group 4 was observed in masseter muscle pain [Mean Difference=2.3 / 2.7 / 5.5 (95%CI=0.2 to 4.4 / 0.9 to 4.4 / 3.8 to 7.2)], anterior temporalis [Mean Difference=2.6 / 2.1 / 5 (95%CI=0.5 to 4.7 / 0.1 to 4.1 / 3.2 to 6.7)], sternocleidomastoid [Mean Difference=3.3 / 4.2 / 6.1 (95%CI=1.6 to 4.9 / 2.6 to 5.8 / 4.6 to 7.5)] and upper trapezius [Mean Difference=3.8 / 4.1 /6.6 (95%CI=2.1 to 5.5 / 2.3 to 5.5 / 5.4 to7.7)] as well as in symptoms of headache, teeth clenching and sleep difficulties, anxiety state, stress, depression and sleep quality (p < 0.001). Both Group 2 as Group 3 improved oral health and anxiety trait and the Group 3 increased the pain threshold of upper trapezius muscle and mandibular opening with significant difference relative to Group 4 (p < 0.05). These results were sustained for up to 2 months (p < 0.05), however the improvements of oral health and mandibular opening were not maintained in Groups 2 and 3(p > 0.05), respectively. Conclusions: The results suggest that three physical therapy interventions compared to dental treatment reduce the pain and symptoms and indicate improvement of anxiety, stress, depression and sleep quality. Moreover, the date demonstrate that both combined physical therapy interventions (massage, exercises, relaxation and imagination) as isolated (relaxation therapy and imagination) improve the oral health and only the combined increases the mandibular opening and pain threshold of upper trapezius muscle in individuals with bruxism
46
Connor, Catherine Erwin. "A model combining fluorescent microscopy and culture inhibition to evaluate bacterial activity of calcium hydroxide medicaments." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1285.
Full textAbstract:
Thesis (M.S.)--West Virginia University, 2000.Title from document title page. Document formatted into pages; contains vii, 82 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 47-52).
47
Rancan, Flavia Luiza. "Efeito de terapia fotodinâmica utilizando curcumina como fotossensibilizante sobre o biofilme de S. gordonii formado sobre superfícies lisa e rugosa de titânio." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/23/23147/tde-03072017-164853/.
Full textAbstract:
A prevenção das doenças periimplantares baseia-se em procedimentos de rotina na clínica, com a remoção mecânica do biofilme associada ou não de agentes antimicrobianos locais e sistêmicos. No entanto, o controle do biofilme oral sobre a superfície de implantes é dificultado particularmente sobre as superfícies rugosas do titânio, que apesar de facilitarem a osseointegração, também favorecem a formação do biofilme. Objetivos: Objetivou-se analisar in vitro o efeito da TFD (Terapia fotodinâmica) usando curcumina como fotossensibilizador sobre o biofilme formado na superfície de discos de titânio com superfície rugosa e lisa. Material e Métodos: Biofilme mono espécie de Streptococus gordonii, colonizador inicial do biofilme dental, foi formado em superfícies lisas (usinadas) e rugosas (tratadas) de discos de titânio por 72 horas. Os discos lisos e rugosos foram então distribuídos em 3 grupos: tratados por 5 minutos com curcumina (60?M), clorexidina 0,12% como controle positivo e solução de DMSO (dimetilsufóxido), etanol e água como controle negativo (veículo da curcumina). As amostras foram divididas em 2 sub-grupos: ativado por LED azul (455-492nm) por 7 minutos e não-ativado. A atividade metabólica do biofilme foi determinada pelo método de redução do Sal tetralisol XTT e os resultados analisados estatisticamente pela análise da variância (ANOVA) seguida pelo teste de Tukey (p < 0,05). Resultados: Na ausência de luz, apenas o tratamento com clorexidina promoveu redução microbiana (controle positivo). O tratamento com curcumina ativada pela luz azul reduziu o número de bactérias viáveis no biofilme em 71% nos discos lisos e em 77% nos rugosos, não havendo diferença estatística com o controlepositivo.Conclusão: Os dados in vitro indicam que TFD associada à curcumina tem atividade sobre biofilme microbiano, sugerindo seu potencial no controle do biofilme oral sobre a superfície de titânio, e que este efeito independe da topografia da superfície.Prevention of periimplant diseases is based on routine procedures in the clinic, with the mechanical removal of biofilm associated or not with local and systemic antimicrobial agents. However, the control of oral biofilm on the surface of implants is particularly difficult on the rough surfaces of titanium, which, although facilitating osseointegration, also favors biofilm formation. Objectives: The objective of this study was to analyze in vitro the effect of PDT using curcumin as a photosensitizer on the biofilm formed on the surface of titanium discs with a rough and smooth surface. Material and Methods: Biofilm mono species of Streptococus gordonii, initial colonizer of the dental biofilm, was formed on smooth (machined) and rough (treated) surfaces of titanium discs for 72 hours. The smooth and rough discs were then divided into 3 groups: treated for 5 minutes with curcumin (60 ?M), 0.1% chlorhexidine as a positive control and DMSO, ethanol and water solution as a negative control. The samples were divided into 2 subgroups: activated by blue LED (455-492nm) for 7 minutes and non-activated. The metabolic activity of the biofilm was determined by the reduction XTT salt method and the results analyzed statistically by ANOVA followed by the Tukey\'s test (p <0.05) Results: In the absence of light, only the chlorhexidine treatment promoted microbial reduction (positive control). The blue light-activated curcumin treatment reduced the number of viable bacteria in the biofilm in 71% in the smooth discs and in 77% in the wrinkles, and there was no statistical difference with the positive control. Conclusion: In vitro data indicate that PDT associated with curcumin has activity on microbial biofilm, suggesting its potential in the control of oral biofilm on the titanium surface, and that this effect is independent of surface topography.
48
Massi, Santiago. "Análise física química e mecânica de um cimento experimental à base de MTA /." Araraquara : [s.n.], 2010. http://hdl.handle.net/11449/95394.
Full textAbstract:
Orientador: Mário Tanomaru FilhoBanca: José Milton Carlos Kuga
Banca: Marco Antonio Hungaro Duarte
Resumo: Modificações têm sido propostas ao MTA e cimento Portland para a obtenção de um cimento obturador de canal radicular. Um material experimental à base de MTA (CE-MTA) é avaliado neste estudo para emprego como cimento endodôntico, contendo cimento Portland, radiopacificador, aditivos e veículo. Assim, o objetivo deste estudo foi avaliar o cimento experimental, usando como parâmetros comparativos o cimento AHPlus (AHP), MTA-Angelus (MTA) e cimento Portland (CP). Foram realizados testes de tempo de presa; resistência à compressão; escoamento; radiopacidade; alteração do pH e liberação de íons cálcio. Todas as metodologias foram definidas usando como referência normas ISO e a literatura científica recente da área endodôntica. O teste de escoamento seguiu a metodologia proposta pela norma ISO, com a medição do diâmetro dos discos de cimento, assim como da área por meio de um programa de imagens. O tempo de presa foi avaliado pela norma da ADA/ASTM, verificando os períodos de tempo necessários para que as agulhas indentadoras (100g e 2mm de diâmetro na ponta; e 456g e 1 mm de diâmetro na ponta) não marcassem a superfície dos discos de cimento, fornecendo resultados para a presa inicial e final. No teste de radiopacidade foi feita uma comparação da radiopacidade de discos de cimento de 10mm de diâmetro e 1 mm de espessura, com uma escala de alumínio padronizada. A alteração de pH do foi avaliada com um pHmetro e a liberação de cálcio com um espectrofotômetro de absorção atômica. Para ambos os ensaios tubos preenchidos com o cimento foram imersos em frascos contendo água destilada. Os tubos foram passados para um novo frasco contendo mais água destilada nos períodos de tempo de 3, 6, 12, 24 e 48 horas, assim como 7, 14 e 28 dias. O líquido remanescente nos frascos foi avaliado para obter os resultados deste ensaio. Na resistência à compressão... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Modifications of MTA and Portland cement has been proposed to obtain an root canal sealer. This study evaluates an experimental MTA based root canal sealer (CE-MTA) which contains Portland cement, radiopacifier, addictives and a vehicle. The aim of this study was to evaluate the experimental endodontic sealer, using white Portland cement (CP), MTAAngelus(MTA) and AH Plus (AHP) as control groups. The tests realized were: setting time, radipacity, compressive strength, pH alterations, calcium release and flow. The flow test followed the ISO 6876 norms, and the the sealer discs' area was measured with a paquimeter and using an area measurement software. The setting time was measured based on the ADA/ASTM Norm, allowing initial and final setting time measurements. Radiopacity was measured using an aluminum scale as reference and sealer discs with 10 mm in diameter by 1 mm thick. The pH was measured using a pHmeter and the calcium release using an atomic absorption spectrophotometer. For compressive strength test the ISO 9917 methodology was used, testing specimens at 24 hours and 21 days. All the data was submitted to statistical analysis, a normality test, and after the data normality check, an ANOVA and a Tukey test using 5% significance were applyed. Results: The results showed that CE-MTA has flow similar to AH Plus and superior to the minimum required by the ISO standard. The setting time was faster than AH Plus and slower than MTA and Portland cement. The compressive strength was lower for the experimental sealer at 24 hours time compared with all the tested materials, and similar for the experimental sealer and MTA at 21 days. The experimental sealer had a superior calcium release in all period of time, and higher pH values until 48 hours period, being similar to MTA and Portland cement on posterior time periods. The experimental sealer radiopacity was lower... (Complete abstract click electronic access below)
Mestre
49
Massotti, Fabrício Poletto. "Avaliação tomográfica e histomorfométrica da influência da terapia a laser de baixa intensidade sobre o reparo tecidual perimplantar em mandíbulas de coelhos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/78626.
Full textAbstract:
Introdução: A terapia a laser de baixa intensidade (LLLT) é uma importante ferramenta na biomodulação tecidual quando do processo cicatricial de uma ferida ou dano cirúrgicos. A sua aplicação favorece o reparo ósseo na região de implantes dentários. Objetivos: Avaliar as alterações no processo de reparo ósseo perimplantar em alvéolo do incisivo inferior de coelho após exodontia seguido da instalação imediata de um implante osseointegrável, irradiado ou não com laser de baixa intensidade (AsGaAl) em diferentes parâmetros através da análise da densidade de imagem perimplantar por tomografia computadorizada de feixe cônico (TCFC) e histomorfométrica da interação entre osso e implante. Verificar a aplicabilidade da TCFC no controle pós-operatório de implantes dentários através de correlação com a microscopia óptica. Metodologia: A amostra foi composta por vinte e quatro fragmentos de mandíbulas dissecadas de coelhos contendo um implante dentário colocado após a exodontia. A distribuição das amostras foi realizada de forma que cada grupo conteve seis mandíbulas, sendo um grupo controle (C) e três grupos experimentais (EI, EII, EIII) seguindo o padrão de aplicação da laserterapia, nos animais in vivo durante 13 dias. O grupo controle recebeu aplicação de laser placebo. O grupo EI recebeu dose de 70J/cm2, o EII-35J/cm2 e o EIII-140J/cm2. Aos 45 dias do experimento todos os animais foram mortos tendo suas mandíbulas dissecadas e submetidas à TCFC para análise da densidade de imagem perimplantar através de dois métodos de avaliação (linear e área retangular). Após, as amostras foram incluídas em resina e preparadas para análise através de microscopia óptica. Na análise histomorfométrica foi mensurada a extensão linear de contato entre osso e implante (ELCOI), a área óssea por espira (AOE), a área óssea retangular (AOR) e a área de fibras colágenas (FC) das três espiras médias do implante. Resultados: Os resultados foram analisados através da análise de variância (ANOVA) complementada pelo teste de comparações múltiplas de Tukey ao nível de significância de 5%. Observou-se um aumento da ELCOI e da FC para o grupo EIII em comparação com os demais grupos. A avaliação linear por TCFC demonstrou médias de nível de cinza mais elevadas para o grupo EIII em comparação com os demais grupos e que os grupos EI e EII apresentaram valores maiores que o grupo C. A avaliação da área retangular por TCFC e avaliações histomorfométricas de área óssea retangular (AOR) e por espira (AOE) não apresentaram diferenças significativas entre os grupos. Não foi possível detectar correlação entre as análises dos resultados obtidos por histomorfometria e TCFC através do coeficiente de correlação de Pearson ao nível de significância de 5%. Conclusão: A LLLT biomodula positivamente o reparo ósseo perimplantar na dose de 140J/cm2. A densidade de imagem perimplantar avaliada pelos dois métodos propostos obtidos por TCFC não demonstrou correlação significativa com os resultados da histomorfometria, sendo discutível sua aplicação no controle pós-operatório de implantes dentários.Introduction: The use of low level laser therapy (LLLT) is an important tool in tissue biomodulation during the healing process of a wound or surgical damage. The application promotes bone repair in the area of dental implants. Objectives: To evaluate the changes in the peri-implant bone healing in mandibular incisor alveoli of rabbits after extraction followed by immediate installation of an osseointegrated implant, irradiated or not with low intensity laser (GaAlAs) on different parameters by analyzing the image density perimplantar with cone beam computed tomography (CBCT) and histomorphometry of the interaction between bone and implant. Verify the applicability of CBCT in postoperative follow up of dental implants through correlation with optical microscopy. Methodology: The sample was composed of twenty-four fragments of dissected rabbits jaws containing a dental implant placed after the extraction. The distribution of samples was performed so that each group contained six jaws A sample was divided in one control group (C) and three experimental groups (EI, EII, EIII) in which the standard laser therapy was applied in live animals for 13 days. The control group received placebo laser application. The EI group received a dose 70J/cm2, EII-35J/cm2 and EIII-140J/cm2. At 45 days of the experiment all animals were killed and their mandibles were dissected and submitted for analysis to the CBCT image density perimplantar through two evaluation methods (linear and rectangular area). After the samples were embedded in resin and prepared for analysis by optical microscopy. In histomorphometry was measured the bone-implant contact (BIC), bone area within the implant threads (BAS), bone area rectangular (BAR) and the area of collagen fibers (CF) of three median spirals of the implant. Results: The results were analyzed by analysis of variance (ANOVA) complemented by the multiple comparison test of Tukey at a significance level of 5%. It was observed an increase in BIC and CF for the group EIII compared to the other groups. The CBCT linear evaluation demonstrated gray level averages higher for the group EIII compared to the other groups and that the groups EI and EII were higher than group C. The evaluation of the rectangular area by CBCT and ratings histomorphometric bone area rectangular (BAR) and within the implant threads (BAT) showed no significant differences between groups. There were no significant relation between the analyzes of the results obtained by histomorphometry and CBCT through the Pearson correlation coefficient at a significance level of 5%. Conclusion: LLLT modulates positively bone repair in the peri-implant with dose 140J/cm2. The image density perimplantar evaluated by the two proposed methods obtained by CBCT demonstrated no significant correlation with the results of histomorphometry, being moot its application in controlling postoperative dental implants.
50
Salmeron, Samira. "Efeitos do laser em baixa intensidade, da terapia fotodinâmica e do azul de toluidina O na descontaminação de superfícies de implantes metálicos: estudo microscópico em subcutâneo de ratos." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/25/25146/tde-16082011-085632/.
Full textAbstract:
A peri-implantite acomete um número crescente de indivíduos e os protocolos de tratamento objetivam descontaminar as superfícies dos implantes e torná-las novamente osseointegráveis. Porém, ainda não foi estabelecido um padrão ouro de tratamento para peri-implantite. Este estudo testa o poder de descontaminação do laser em baixa intensidade (LBI), da terapia fotodinâmica (PDT) e do azul de toluidina O (TBO). Sobre discos de titânio de 1,5 mm de espessura e 4,0 mm de diâmetro de superfícies lisas ou rugosas foi permitida a deposição natural de biofilme microbiano por 7 dias após os quais os discos foram divididos em grupos experimentais (15 discos por grupo), de acordo com o método de descontaminação: grupo LBI (laser de InGaAlP de 660 nm, 30 mW, 45 J/cm2 no modo continuo por 30 s); grupo PDT; grupo TBO (aplicação de TBO por 60 s); grupo controle positivo (C) sem tratamento e grupo controle negativo (NC) estéril. Os discos foram implantados em tecido conjuntivo subcutâneo de ratos e, após 7, 28 e 84 dias, foram obtidas 5 biópsias de cada grupo para análise em microscopia óptica. Implantes lisos e rugosos não diferiram com relação ao grau de fibrosamento e severidade do infiltrado inflamatório, mas a área do tecido reacional perimaterial foi maior nos rugosos (2,6 ± 3,7 x 106 µm2) do que nos lisos (1,9 ± 2,6 x 106 µm2). O grupo C foi o que apresentou menor grau de fibrosamento do tecido reacional (1), mas somente houve diferença estatisticamente significante (p = 0,0230) entre os grupos C e NC. A severidade do infiltrado inflamatório somente diferiu significantemente entre os grupos aos 7 dias, quando o grupo NC apresentou o menor escore (2) em comparação aos demais grupos (3). Com relação à área do tecido reacional perimaterial, só houve diferenças entre os grupos aos 7 dias, quando o grupo C apresentou maior área que os demais grupos (9,11 ± 2,10 x 106 µm2), porém, sem diferença estatisticamente significante em comparação aos grupos LBI e TBO. A área apresentada pelo grupo PDT (4,34 ± 1,49 x 106 µm2) só foi inferior ao grupo NC (0,65 ± 0,23 x 106 µm2). A espessura do tecido reacional não confirmou a diferença entre os discos de superfície lisa e os de superfície rugosa (p = 0,2801), mas confirmou todas as demais comparações relativas à área, sendo que o grupo NC apresentou menor espessura que os demais somente aos 7 dias. O grupo NC apresentou menor espessura de tecido reacional do que os demais grupos, mas essa diferença foi estatisticamente significante somente aos 7 dias. Os demais grupos não diferiram entre si quanto a esse parâmetro. Concluiu-se que implantes rugosos ou lisos contaminados por biofilme microbiano e tratados com LBI, PDT e TBO não diferem entre si quanto aos parâmetros inflamatórios teciduais, parecendo haver leve superioridade da PDT sobre os demais tratamentos apenas no período mais precoce de observação. Porém, com o passar do tempo, todos os tratamentos se equiparam a implantes estéreis quanto à reação tecidual perimaterial.The peri-implantitis is a disease that is increasing in a number of individuals and the protocols of treatment has intended to decontaminate the implant surfaces and makes this biocompatible again. However, until this moment, a gold standard for peri-implantitis treatment was not established. The present study tests the power of decontamination of low intensity laser (LBI), photodynamic therapy (PDT) and toluidine blue O (TBO). The natural deposition of microbian biofilm was allowed on titanium discs with 1,5 mm of thickness and 4,0 mm of diameter and smooth and grooved surfaces during 7 days when the discs were separated in experimental groups (15 discs each group), in accordance with the decontamination method: LBI group (decontamination with InGaAlP laser, 660 nm, 30 mW, 45 J/cm2 in continuous way during 30 s); PDT group; TBO group (application of TBO during 60 s); controlled positive group (C) without any kind of treatment and controlled negative group (NC), sterile. The discs had been implanted in rats subcutaneous connective tissue and, after 7, 28 and 84 days, had been gotten 5 biopsies from each group for histology processing. Smooth and grooved implants did not differ on fibrosis grade and severity of the inflammatory infiltrate, however the perimaterial reaction tissue area was bigger on grooved implants (2,6 ± 3,7 x 106 µm2) that on smooth implants (1,9 ± 2,6 x 106 µm2). The C group was the one that showed the smallest reaction tissue fibrosis grade (1), but only was significant statistical difference (p = 0,0230) between C and NC groups. The severity of inflammatory infiltrate only significant differed between the groups on 7 days, when the NC group showed the smallest score (2) in comparison to the others groups (3). In relation to the perimaterial reaction tissue area, only were differences between the groups on 7 days, when C group showed bigger area than the others (9,11 ± 2,10 x 106 µm2), nevertheless, without significant statistical difference in Comparison to LBI and TBO groups. The area presented by PDT group (4,34 ± 1,49 x 106 µm2) only was inferior to NC group (0,65 ± 0,23 x 106 µm2). The reaction tissue thickness did not confirmed the difference between smooth and grooved surfaces discs (p = 0,2801), however it confirmed all the comparisons related to the area parameter, where NC group showed smaller thickness than the others only on 7 days. NC group showed smaller thickness than the others, but this difference was statistical significant only on 7 days. The other groups did not differ among them in this parameter. It was concluded that grooved and smooth implants contaminated by a microbian biofilm ant treated with LBI, PDT and TBO did not differed among them in relation to tissue inflammatory parameters, seems that is a light superiority of PDT in relation to the others only in the earliest period of observation. Nevertheless, with the time, all the treatments were equally to sterile implants in relation to perimaterial reaction tissue.