Thesis (M.S.)--University of Michigan, Ann Arbor, 1977. / Typescript (photocopy). eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 56-61).

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

Thesis (M.S.)--University of Michigan, 1969. / Typescript (photocopy). eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 49-53).

Thesis (M.D.S.)--University of Hong Kong, 1995. / Includes bibliographical references (leaves 174-195).

Thesis (M.D.S.)--University of Hong Kong, 1995. / Includes bibliographical references (leaves 174-195). Also available in print.

Thesis (M. Orth.)--University of Hong Kong, 2005.

Orientador: Frab Norberto Boscolo / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-15T03:02:59Z (GMT). No. of bitstreams: 1 Rodrigues_Messias_M.pdf: 1187476 bytes, checksum: 1b1617668cea9154e821cbb731522fd3 (MD5) Previous issue date: 2010 / Resumo: O objetivo com este estudo foi comparar imagens de Telerradiografia Lateral (TL) e de corte sagital mediano em Tomografia Computadorizada de Feixe Cônico (TCFC) pela exatidão da marcação de pontos na região de Sínfise Mandibular. A amostra com 28 TL e 28 TCFC, foi obtida de 28 pacientes submetidos a tratamento ortodôntico, os quais tinham características anatômicas semelhantes, na região de Sínfise Mandibular. Dez (10) examinadores calibrados analisaram todas as imagens, separadamente, em 2 períodos distintos, marcando seis pontos na região da Sínfise Mandibular, sendo eles: 1 - Ápice, 2 - Borda Incisal, 3 - Infradentário Lingual, 4 - Infradentário Vestibular, 5 - Mentoniano Interno, 6 - Mentoniano Externo. A definição dos pontos de referência, padrão prata, foi realizada por outro avaliador sem blindagem com as imagens, de TL e de TCFC, postas lado a lado. A distância, entre os pontos de referência e os marcados pelos avaliadores, foi mensurada com uma grade milimetrada superposta às imagens. Foi utilizado o coeficiente de correlação interclasses (CCI) para avaliar a reprodutibilidade intra- e inter-examinadores, e as distâncias entre os pontos marcados foram analisados pelo teste de Wilcoxon (a=0,05). Nos resultados observou-se que os pontos, Borda Incisal, Mentoniano Interno e Externo não apresentaram diferenças estatisticamente significativas (p>0,05) de distâncias entre as marcações, por outro lado os pontos Infradentário Vestibular e Lingual apresentaram diferenças (p<0,05). Baseado nos resultados obtidos pode-se concluir que a região da parte inferior da Sínfise Mandibular e Borda Incisal são locais que, para fins de diagnóstico, podem ser visualizados na TL com a mesma exatidão que a imagem tomográfica. Por outro lado, quando o local requisitado para diagnóstico estiver situado na altura mediana das raízes dos incisivos, tanto pela face vestibular quanto pela lingual, somente a imagem de TCFC oferece condições de visualização com exatidão das estruturas ali situadas. / Abstract: The aim with this study was to compare images of Lateral Teleradiography (LT) and sagittal section of Cone-Beam Computed Tomography (CBCT) through the exactness of landmarks made in the Mandibular Shymphisys region. The sample with 28 LT and 28 CBCT was obtained from 28 patients undergoing orthodontic treatment, which had similar anatomical features in the Mandibular Shymphisys region. 10 calibrated examiners evaluated all images, separately, in 2 distinct periods, marking six points in the Mandibular Shymphisys area, which are: 1 - Root Apex, 2 - Incisal Edge, 3 - Lingual Infradentale, 4 - Buccal Infradentale, 5 - Internal Mentum, 6 - External Mentum. Another examiner without blindness made the definition of factual landmarks, LT and CBCT, placed side by side. The distance between points (factual landmarks and those marked by the examiners) was measured with a millimeter grid superimposed to images. The interclass correlation coefficient (ICC) was used to evaluate the reliability intra- and inter-examiners, and the distance between marked points was analyzed using the Wilcoxon test (a=0.05). The results showed that statistical differences were not found in distances between Incisal Edge, in Internal Mentum and External Mentum points (p>0.05), on the other hand, Buccal Infradentale and Lingual Infradentale points were differences (p<0.05). In accordance with results, it can be concluded that the lower area of the Symphysis Mandibular and the Incisal Edge point are regions that to diagnosis finality can be visualized in the LT with the same exactness that in the CBCT. Therefore, when the region to diagnosis was the Symphysis Mandibular in middle region of incisor root, as much Buccal as Lingual faces, only the CBCT image supplied conditions to precise visualization of their anatomic structures. / Mestrado / Radiologia Odontologica / Mestre em Radiologia Odontológica

Craniofacial deficiencies in 3-dimensions and their relationships to airway volume have been studied in the past. Much research has investigated maxillary transverse, sagittal or vertical dimensions with correlations to airway volume. Similarly, mandibular characteristics such as its anteroposterior or vertical dimensions have been analyzed. To the author’s current knowledge, there have been limited studies which investigated the relationship between transverse dimensions of the mandible and airway volume. The objectives of our study were to investigate: 1) If there is a significant association between mandibular transverse dimensions and airway volume, mandibular anteroposterior or vertical measurements in the pediatric population. 2) If mandibular anteroposterior and vertical measurements correlated to airway volume. 3) If an OSA symptomatic group had any significant differences in mandibular morphologies, pediatric sleep questionnaire (PSQ), Apnea-hypoxia index (AHI), or Respiratory Disturbance index (RDI), compared to an asymptomatic control group in the pediatric population. This was a cohort, retrospective, correlational study comprised of 22 males, and 14 females (Mean age of 6.8 ± 2.8, range: 2 to 13 years old). Digital CBCT images were acquired from a single private pediatric practice. Utilizing Mimics v.21 analytical software, airway was measured and segmented into right nasal cavity (RNC), left nasal cavity (LNC), nasopharynx (NP), oropharynx (OP) and hypopharynx (HP). Mandibular traits in sagittal, vertical and transverse dimensions were analyzed to see if correlations exist with airway volume, PSQ, AHI, or RDI scores. Differences were also evaluated between symptomatic and asymptomatic groups. Results revealed that asymptomatic patients had significantly greater width between the right and left gonions (Trans-Go) as compared to symptomatic patients. Within each group, Trans-Go was shown to have significant positive correlations to total airway volume, corpus length and ramus height (p < 0.05). There are significant correlations between mandibular transverse dimension and total airway volume, sagittal, and vertical dimensions of the mandible. There may also be transverse differences between symptomatic and asymptomatic patients for sleep disorders in the pediatric population.

No description available.

Thesis (M.Sc.D.)--Boston University School of Graduate Dentistry, 1972. (Orthodontics) / Bibliography included. / The present study was undertaken to document the incidecnce of the relapse phenomena taking place up to two years after completion of active orthodontic therapy. This paper was limited specifically to the post treatment changes of the mandibular plane. The study was carried out on the records of thirty-six patients treated in the orthodontic clinic at Boston University School of Graduate Dentistry. Original, final, and two year post treatment cephalograms, pano-graphs, and study models were evaluated and compared for each patient. Observations of the compiled data revealed that twelve of the thirty-six patients showed a decrease in the mandibular plane angle during treatment, while ten patients showed an increase. Further analysis of the results revealed that the majority (70%) of the patients with the increased mandibular plane angle showed a decrease during the retention period, reverting back to or toward pretreatment values. Of the twelve patients experiencing a decrease during treatment, the post treatment results were more varied, and no definite trends could be observed. Further study is needed to determine if an increase in the mandibular plane angle during orthodontic treatment is nonphysiologic and, therefore, more susceptible to relapse.