Thesis (M.S.)--University of Michigan, 1965.

Thesis (M.S.)--University of Michigan, 1965.

Thesis (M.S.)--University of Michigan, 1955.

Indiana University-Purdue University Indianapolis (IUPUI) / The programs developed in this study are examples of how a personal computer can aid the delivery of dental care. The versatility of the computer depends on the availability of a variety of programs specifically developed for dentistry, without which computers will have little impact on treatment. Moyers' analysis adapted for the Apple II and its research modification are computer programs developed specifically for dentistry. Accurately predicting the mesiodistal widths of the unerupted permanent canines and premolars in the mixed dentition can lead to orthodontic treatment that is optimally timed, with desirable facial and dental results. The stage of the mixed dentition constitutes the most intricate period in the development of the occlusion; any small anomaly occurring in this stage can pose complicated problems for the permanent dentition, requiring a more extensive and expensive mechanotherapy. Malocclusion is a developmental problem. Analysis of dental crowding and its relationship to tooth size and arch dimensions yielded the following results for the maxillary and mandibular arches: 1. Statistically different values for tooth size were noted between crowded and noncrowded groups, with crowded individuals having larger teeth. 2. Arch perimeter and arch depth were significantly smaller in crowded groups than noncrowded groups. 3. No significant differences were noted between crowded and noncrowded groups in arch width or symmetry. 4. Significant differences were demonstrated in the eccentricity value of an ellipse for crowded and noncrowded cases. This study suggests that dental crowding is associated with both small dental arches and large teeth. Therefore, greater consideration may be given to those treatment techniques which increase dental arch width, length, and perimeter. This is especially relevant in younger patients whose dentitions are in the deciduous and mixed stages of development. Further investigation into the relationship of dental crowding and arch shape with a larger sample might be productive. The eccentricity of a curve should be used to evaluate pre and post orthodontic treatment. Modifications to the basic computer program could include prediction values for Black Americans, cephalometric value interpretation, and the Bolton and Ponts analysis as a comprehensive diagnostic computer package.

Thesis (M.S.)--University of Michigan, 1959.

Thesis (M.S.)--University of Michigan, 1959.

Indiana University-Purdue University Indianapolis (IUPUI) / This study was undertaken to determine normal changes which occur over a period of approximately ten years, in occlusions determined to be excellent in the mixed dentition stage of development. Skeletal patterns were compared graphically with Downs' sample of patients with excellent occlusion. A model analysis was used to compare various aspects comprising an excellent occlusion. The data derived from the model analysis was subjected to a statistical analysis. The results showed a more protrusive facial profile with increase in age. Also, there was a decrease in overjet, cuspid occlusion became slightly more Class II, and there was an increase in the presence and amount of crowding in the lower anterior teeth.

Thesis (M.S.)--University of Michigan, 1955.

Thesis (M.S.)--University of Michigan, 2002. / Includes bibliographical references.

Orientador: Maria Beatriz Duarte Gavião / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-06T08:16:33Z (GMT). No. of bitstreams: 1 Gambareli_FlaviaRiqueto_M.pdf: 685304 bytes, checksum: 895caadd40aaa440b444f7b5a65c183a (MD5) Previous issue date: 2006 / Resumo: O objetivo deste trabalho foi avaliar a performance mastigatória, a atividade eletromiográfica dos músculos masseter e porção anterior do temporal e a mastigação de alimentos de diferentes consistências em crianças na fase de dentição mista, com perda precoce de dentes decíduos posteriores, antes e após reabilitação protética. Para tanto, o estudo foi composto por três capítulos. No capítulo 1, intitulado Influence of measurement technique, test food, teeth and muscle force interactions in masticatory performance evaluation, realizou-se a revisão de literatura sobre performance mastigatória e discorreu-se sobre as variáveis influenciadoras. A revisão mostrou que a performance mastigatória tem sido amplamente avaliada e associada às variáveis morfológicas e funcionais do sistema mastigatório. No capítulo 2, intitulado Masticatory performance before and after oral rehabilitation in children, avaliou-se a performance mastigatória com alimento teste artificial. No capítulo 3, intitulado The influence of oral rehabilitation on muscle activity and chewing behavior in partially edentulous children, avaliou-se a atividade eletromiográfica dos músculos masseter e porção anterior do temporal e o comportamento mastigatório com alimentos de diferentes consistências. Avaliou-se também as variáveis corporais, peso e altura em ambos os capítulos. A performance mastigatória foi avaliada através da mastigação de um material à base de silicona, utilizando o sistema de peneiragem fragmentada para determinar o tamanho das partículas após mastigação. Para o registro eletromiográfico, foram utilizados o sistema de aquisição de sinais (EMG System do Brasil Ltda.) e o software Aqdados ¿ versão 5.0 da Lynx Eletrônica Ltda. O sinal eletromiográfico foi captado em contração voluntária máxima bilateral tendo o material Parafilm entre os molares e em mastigação habitual com alimento teste artificial. Os alimentos utilizados para avaliação da mastigação foram: goma de mascar (Trident tutti fruit, Adams), cenoura crua, queijo polenghi, banana nanica, torrada industrializada. Na análise dos dados do segundo e terceiro capítulos utilizou-se o teste de Shapiro-Wilk para verificação da normalidade da distribuição dos dados. Os Testes t pareado, Wilcoxon, Kruskal-Wallis e post hoc Dun, Correlação de Pearson e Spearman e regressão linear foram aplicados quando indicados, com nível de significância de 5%. Os resultados mostraram que não houve diferença estatística entre os sexos para nenhuma das variáveis (p>0.05). Houve um decréscimo significativo para o tamanho da partícula mediana antes e após 6 meses da instalação do aparelho protético (p<0,001). A atividade muscular foi significativamente maior na segunda avaliação durante a mastigação do alimento artificial (p<0,05). Considerando as variáveis corporais, houve correlação negativa significativa entre performance mastigatória, altura e peso na primeira sessão de exames (p<0,05), e não houve correspondentes correlações na segunda sessão de exames (p>0,05). Houve diferenças significativas no número de ciclos mastigatórios até a deglutição, duração da mastigação e a quantidade de alimento ingerida tanto para os alimentos duros quanto macios nas duas avaliações. A prótese parcial removível influenciou os aspectos funcionais dos músculos, determinando melhora da eficiência mastigatória e aumento da atividade muscular / Abstract: The aim of this study was to evaluate the masticatory performance, the electromyographic activity of the masseter and temporal anterior muscles and the chewing of foods of different consistency in children in the phase of mixed dentition, with early loss of posterior deciduous teeth, before and six months after oral rehabilitation with removable dental prosthesis. Three chapters compose the study. In chapter 1, entitled Influence of measurement technique, test food, teeth and muscle force interactions in masticatory performance evaluation, a review of the pertinent literature about masticatory performance was done, and the influencing variables were discussed. The review showed that masticatory performance has been widely evaluated and associated to the morphological and functional variables of the masticatory system. The second chapter entitled Masticatory performance before and after oral rehabilitation in children evaluated the masticatory efficiency with artificial test food. The third chapter entitled The influence of oral rehabilitation on muscle activity and chewing behavior in partially edentulous children evaluated the electromyographic activities of the masseter and temporal anterior muscles and the chewing of foods of different consistency. Also, it was evaluated the body variables, weight and height, in these two chapters. The masticatory performance was evaluated by the mastication of a silicone impression material, using the fragmented sieving system to determine the size of the chewed particles. For the electromyographic record, were used the system of acquisition of signs (EMG System of Brazil Ltd.) and software Aqdados-version 5.0 of Lynx Eletrônica Ltd. The electromyographic sign was captured in maximum bilateral voluntary contraction having the Parafilm material among the molars and in habitual mastication with artificial tests food. The foods for the chewing evaluation were: chewing gum raw carrot, polenghi cheese, banana and industrialized toast. For data analysis in the second and the third chapters, the normality of the distributions was assessed by the Shapiro-Wilks W-test. The t paired tests, Wilcoxon, Kruskal-Wallis and pos hoc Dun, Pearson¿s or Spearman¿s Correlations and linear regression were applied as indicated, with significance level of 5%. The results showed no statistical differences between genders for any of the variables (p>0.05). There was a significant decrease in the median particle size from first to second evaluation (p=0.000). The muscle activity was significantly greater on the second evaluation during the chewing of the artificial food (p<0.05). Considering the body variables, there was a significant negative correlation between masticatory efficiency, body height and weight in the first session of exams. After 6 months of the placement of the prosthesis no significant correlations were found for these variables (p<0.05). It was observed significant differences in number of cycles until swallowing, chewing duration and amount of food ingested for the soft and hard foods, at the two evaluations. Within the limitations of this study, it can be concluded that the removable dental prosthesis influenced the function of the muscles, determining an increase in the masticatory efficiency and an increasing in the muscle activity. It was considered that the body alterations could have been consequences of the enhancement in the masticatory function determined by the oral rehabilitation / Mestrado / Odontopediatria / Mestre em Odontologia