Thesis (M.S.)--University of Tennessee Health Science Center, 2009. / Title from title page screen (viewed on July 23, 2009). Research advisor: Robert Brandt Document formatted into pages (vii, 42 p. : ill.). Vita. Abstract. Includes bibliographical references (p. 37-39).

Thesis (Ph.D.)--University of Hong Kong, 2004. / Also available in print.

Orientador : Francisco de Assis Mollo Junior / Banca: João Neudenir Arioli Filho / Banca: Helena de Freitas Oliveira Paranhos / Resumo: O presente estudo procurou avaliar a prevalência de sinais e sintomas de disfunção craniomandibular (D.C.M.) em 100 pacientes desdentados totais, portadores de próteses totais duplas, dos quais 58 apresentavam dimensão vertical normal (Grupo 1) e 42 dimensão vertical com alteração (Grupo 2). Os dados foram obtidos a partir de um índice anamnésico simplificado e de exame físico. Após a análise estatística, foi possível observar que: 1. em relação ao índice anamnésico utilizado, a análise estatística mostrou haver associação entre a dimensão vertical e os sintomas de D.C.M. (p=0,016); 2. quanto ao número de regiões sensíveis à palpação muscular, foi constatada uma associação estatisticamente significante com a dimensão vertical (p=0,014); 3. quando avaliados os grupos musculares isoladamente, apenas a palpação intraoral do músculo pterigóideo lateral apresentou associação estatisticamente significante com a dimensão vertical (p=0,05). Conclui-se, por meio deste estudo, que existe uma evidência de associação entre a dimensão vertical e os sinais e sintomas de D.C.M. considerando-se a metodologia empregada e a população estudada. / Abstract: The present study evaluated the prevalence of signs and symptoms of temporomandibular disorders in 100 patients wearing complete upper and lower dentures, 58 with normal vertical dimension (Group 1) and 42 with altered vertical dimension (Group 2). The data were obtained utilizing a simplified anamnestic index and of physical exam. After the statistical analysis, it was possible to conclude that: 1. there was a significant correlation between the vertical dimension and the symptoms of temporomandibular disorders, when utilizing the anamnestic index (p=0,016); 2. there was a significant correlation between the vertical dimension and the number of tenderness sites during muscle palpation (p=0,014); 3. when appraised the muscular groups separately, just the tenderness to the intra-oral palpation of the lateral pterygoid muscle showed a statistically significant correlation with the vertical dimension (p=0,05). It could be concluded that there was an association between the vertical dimension and the signs and symptoms of temporomandibular disorders, for this sub population that has been analysed. / Mestre

Thesis submitted in fulfilment of the requirements for the degree Master of Technology: Dental Technology in the Faculty of Health and Wellness Sciences at the Cape Peninsula University of Technology 2014 / A pure nylon denture base does not bond chemically to the acrylic teeth processed into the denture. A mechanical bond is created by boring retention holes (diatorics) into the tooth structure. Concerns are that this form of retention might be insufficient. The purpose of this study is, firstly, to compare the retention of acrylic denture teeth in pure nylon dentures with that of teeth in conventional acrylic denture bases (the acrylic test pieces serving as the control standard), and secondly, to explore whether the technique prescribed for creating diatorics in acrylic teeth for use with pure nylon denture bases potentially has a weakening effect on the acrylic tooth structure. Two sets of 26 identical anterior one-tooth test pieces were created. The first set, labelled N, comprises two different pure nylon denture base materials labelled N1 and N2 – all have diatorics in the acrylic teeth. The second set, labelled A, comprised the same acrylic denture base. The set labelled A1 is the control standard without diatorics in the acrylic teeth and the set labelled A2 has diatorics within the acrylic teeth. A compressive load was applied to these test pieces at an angle of 45 degrees on the palatal surface of the tooth until fracture occurred or maximum load was reached. Resulting data from the first part of the research was analysed by One-Way ANOVA analysis. Resulting data for the second part of the research was analysed via the Chi-square cross- tabulation method. The One-Way ANOVA test revealed that there is no statistical difference in the mean fracture or maximum load in Newton values between the two A (acrylic denture base) groups. There is also no statistical difference in the mean fracture or maximum load in Newton values between the two N (pure nylon denture base) groups. There is, however, a statistically significant difference in the mean fracture or maximum load in Newton values of Group A in comparison to Group N. The Chi-square cross-tabulation indicated that the A groups have very similar breakage patterns, and the N groups have similar breakage patterns respectively. It is concluded that the mechanical retention of acrylic denture teeth in pure nylon denture bases is weaker than the mechanical and chemical retention of acrylic denture teeth in acrylic denture bases. It is also concluded that when diatorics are created as prescribed within the tooth, these do not weaken the tooth structure.

Orientadores: Rafael Leonardo Xediek Consani, Janaína de Cássia Orlandi Sardi / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-17T04:26:24Z (GMT). No. of bitstreams: 1 Silva_ManoelaCapladeVasconcellosdosSantosda_M.pdf: 1427757 bytes, checksum: 3e559b527f8ddc7215c4e2a25c440832 (MD5) Previous issue date: 2010 / Resumo: Neste estudo o objetivo foi avaliar a efetividade da irradiação por energia de microondas na desinfecção de resinas acrílicas para confecção de próteses totais. Setenta e dois corpos-deprova em resina acrílica de diferentes tipos (Vipi convencional, Vipi Wave e Vipi convencional) foram confeccionados de forma padronizada e submetidos à esterilização com óxido de etileno. Na parte superior dos corpos-de-prova foram inoculados 100 µL do inóculo de uma das três espécies de Candida e posterior colocação em estufa a 37°C por 1 hora e 30 minutos para a realização da primeira aderência. Após este tempo, cada poço foi completado com meio estéril e a placa novamente levada à estufa para incubação a 37°C por 6 horas. Após essa incubação, os 54 corpos-de-prova foram imersos em 10 mL de água estéril e irradiados por energia de microondas a 650 W por 3 minutos. Dezoito corpos-deprova não irradiados foram considerados grupo controle. Após a incubação por 48 horas, tanto as placas das amostras irradiadas quanto as não irradiadas foram submetidas à contagem de colônias em contador de colônias digital. Os números de unidades formadoras de colônias por mililitro foram calculados e comparados estatísticamente para verificação da efetividade do método de desinfecção proposto. As semeaduras das placas de Petri referentes aos corpos-de-prova irradiados (grupo experimental) não apresentaram colônias viáveis para todos os microorganismos avaliados após incubação a 37ºC por 48 horas. Os resultados demonstraram efetiva esterilização após 3 minutos de irradiação a 650 W para todos os corpos-de-prova do grupo experimental. Os corpos-de-prova do grupo controle (não irradiadas) apresentaram crescimento microbiano após 48 horas de incubação. A irradiação por microondas a 650 W por 3 minutos mostrou ser um método efetivo na esterilização dos corpos-de-prova inoculados com C. albicans, C. dubliniensis e C. tropicalis / Abstract: The objective of this study was to evaluate the effectiveness of microwave irradiation in the disinfection of acrylic resins for the fabrication of dentures. Seventy two specimens of acrylic resin of different types were made in a standardized and subjected to sterilization with ethylene oxide. The specimens were individually inoculated with100 µL of inoculums of three species of Candida, and later placed in an incubator at 37°C for 1 hour and 30 minutes to perform the first adhesion. After this time, each well was supplemented with sterile media and the plate once again brought to a stove for incubation at 37°C for 6 hours. After this incubation, the 54 specimens were immersed in 10 mL of sterile water and irradiated by microwave energy at 650 W for 3 minutes. Eighteen specimens were considered non-irradiated control group. After incubation for 48 hours, both plates of the irradiated samples as the non-irradiated were subjected to counting of colonies in colony digital counter. The number of colonies forming units per milliliter were calculated and compared to verify the effectiveness of the proposed method of disinfection. Cultivation of Petri plates relating to specimens irradiated (experimental group) showed no viable colonies for all microorganisms assessed after incubation at 37°C for 48 hours. The results demonstrated effective sterilization after 3 minutes of irradiation at 650W for all specimens the experimental group. Petri plates sown with the bodies corresponding specimens control group (not irradiated) showed microbial growth after 48 hours of incubation. A microwave irradiation at 650 W for three minutes proved to be an effective method of sterilization of the specimens inoculated with C. albicans, C. dubliniensis and C. tropicalis / Mestrado / Protese Dental / Mestre em Clínica Odontológica

Magister Scientiae Dentium - MSc(Dent) / Few studies have documented the impact of complete dentures on patients’ oral health-related quality of life. Objectives: The purpose of this study was to investigate the relationship between gender, age, socioeconomic status and denture satisfaction / South Africa

A research report submitted to the School of Oral Health Science, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree of Master of Dentistry in the field of Prosthodontics. Johannesburg, 2013 / Background: The majority of edentulous patients are unable to afford anything other than mucosa-borne complete dentures, but the conventional methods of complete denture fabrication can be lengthy and expensive. Simplified techniques have been proposed to reduce the number of clinical visits as well as the laboratory time and costs. One such technique has advocated making the final heat-cured acrylic resin denture base after the first visit, which then requires a second processing cure for the artificial teeth. This dual-cure has been reported to cause distortion of the previously cured denture base. Purpose: To measure the amount of linear and three-dimensional distortion of an acrylic resin maxillary denture base following an additional curing cycle using different processing methods. Method and Materials: A standardised method was developed for fabricating a maxillary denture base with measuring pins , as well as a standardised method for waxing an arch of teeth to the base. The pins were used to make three-dimensional measurements using a Reflex Microscope. The resins used were from the same manufacturer. Four dual cure methods of varying temperature and time were used: 1. Place flask in boiling water for 20 minutes, remove and plunge into cold water for 20 minutes; 2. Place into cold water, heat up to 70°C, leave for 1 hour, remove and bench cool; 3. Place into cold water, bring to 72°C for 8 hours and bench cool; and 4. Place in cold water, bring to the boil for 40 minutes, bench cool for 45 minutes, then plunge into cold water for 20 minutes. For each method five models were fabricated, to give a total of 20 models. Results: Although there was an overall distortion of all denture bases following a second cure, the linear and 3D differences were not statistically significant between and within the different dual cure methods tested. The mean percentage changes measured were translated into real changes in distances or angles between the pins, in order to ascertain the clinical relevance of these changes, for if they are too great, the distortion of the denture base will exceed the resilience of the mucosa as well as disrupt the peripheral seal, and the denture base will not be retentive. The largest mean change was seen in the three-dimension distance between the innermost pins in the posterior palate, but this was only 1.3mm. This also showed the worst change of all measurements, but it was still only 2.0mm. Conclusions: With the adaptive nature of the denture-supporting tissues, the changes described are unlikely to have any clinical significance. Although only one brand of denture base resin was used, it is representative of the modern rapid-cure resins, and so rapid cure methods can be advocated when a dual cure is required.

No description available.

published_or_final_version / Dentistry / Doctoral / Doctor of Philosophy

No description available.