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Microbial flora of root canals at the time of obturation and the outcome of treatment麥耀輝, Mak, Yiu-fai. January 2000 (has links)
published_or_final_version / Dentistry / Master / Master of Dental Surgery
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Fracture resistance of different intra-canal systems for restoring primary anterior teeth: in vitro studyMashaly, Ayat Mohamed Maged Mofid Ahmed. January 2009 (has links)
published_or_final_version / Paediatric Dentistry / Master / Master of Dental Surgery
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Influência da radiopacidade dos materiais obturadores sobre a sensibilidade, especificidade e confiabilidade da análise radiográfica de obturações endodônticas / Influence of root canal sealing materials radiopacity on sensitivity, specificity, and reliability of radiographic root canal fillings examBodanezi, Augusto 31 October 2008 (has links)
Investigou-se o efeito da radiopacidade de diferentes materiais obturadores sobre a sensibilidade, especificidade e confiabilidade da análise radiográfica de obturações endodônticas. Após determinação da radiopacidade dos materiais, um total de 80 dentes caninos tiveram seus canais radiculares preparados com a técnica clássica antes de serem divididos em 5 grupos cada qual a ser obturado com um dos cimentos obturadores estudados (AH Plus, Endomèthasone®, Sealer 26, Acroseal e cimento não-radiopaco). Antes do preenchimento com a técnica de condensação lateral da guta-percha, em metade dos dentes de cada grupo, inseriu-se um fio de nylon radiolúcido (Ø 0.25 mm), ao longo do canal radicular para simular um defeito de obturação (n=8). Um total de 36 dentes molares superiores, depois de instrumentados, foram divididos em 3 grupos cada qual a ser obturado com um dos cimentos testados (AH Plus, Acroseal e cimento não-radiopaco) (n=12). Antes da obturação com a mesma técnica utilizada nos caninos, um fio de 0.08 mm de espessura foi estendido no canal disto-vestibular de cada dente. Após a utilização de artifícios para simular a sobreposição dos tecidos humanos, os dentes obturados foram radiografados e as imagens periapicais analisadas por endodontistas e radiologistas quanto à presença de defeitos de preenchimento nas obturações. Após análise estatística empregandose os testes exato de Fisher, Kappa e teste t (p<0.05). Observou-se menor sensibilidade no exame dos dentes anteriores obturados com os cimentos radiopacos, principalmente na avaliação dos radiologistas, e identificou-se maior especificidade para as obturações efetuadas com os cimentos endomethasone® e Acroseal. No julgamento dos dentes posteriores, o cimento Acroseal proporcionou menor sensibilidade do que o AH Plus e houve menores valores de especificidade na avaliação dos endodontistas, embora sem diferenças entre os grupos de cimentos estudados. A confiabilidade mostrou-se maior para as obturações dos caninos realizadas com Endomethasone® e Sealer 26 e não se detectaram diferenças entre os grupos na avaliação das obturações dos molares. Concluiu-se que a radiopacidade dos cimentos influenciou na sensibilidade, especificidade e confiabilidade da análise radiográfica de obturações endodônticas, assim como a especialidade dos examinadores. / The aim of this study was to investigate the effect of different radiopaque sealers in the sensitivity, specificity and realiability of radiographic root canal filling exam. After radiopacity distinction of root canal sealing materials, a total of 80 extracted single-rooted upper canines had their canals prepared with classic technique before being divided into 5 groups, each to be filled with one of the tested sealers (AH Plus, Endomèthasone®, Sealer 26, Acroseal and non-radiopaque sealer). In half specimens a radiolucent nylon monofilament string (Ø 0.25 mm) positioned inside the root canal to simulate a radiolucent void before being filled with gutta percha lateral condensation (n=8). A total of 36 maxillary molars were divide into 3 groups, each to be filled with one of the tested sealers (AH Plus, Acroseal and non-radiopaque sealer). Before being filled with lateral condensation technique, a Ø 0.08mm string was positioned alongside distobuccal root canal. After root canal filling, each tooth was strictly positioned in a device to simulate bone and soft tissue before being exposed to X rays. The resulting images were interpreted for presence of voids by radiologists and endodontists. The differences between groups were assessed using Fisher Exact, Cohens Kappa and t test (>0.05). There were less sensitivity for all radiopaque sealers, specially for radiologists, and higher specificity when Endomethasone® and Acroseal were used to fill the upper canines. Root canal fillings performed in maxillary molars with Acrosel showed lower sensibility values than AH Plus mainly to endodontists, but no difference in specificity between groups. There were lower reliability than control group for canines filled with Endomethasone® and Sealer 26. The differences of reliability between groups were not statistically significant. It was concluded that radiopacity of sealers influenced on sensitivity, specificity and reliability of radiographic root canal filling exam, as well as the speciality of examiners.
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Effect of incident beam angulation on disinfection of dentinaltubulesChia, Catherine Anne. January 2010 (has links)
published_or_final_version / Endodontics / Master / Master of Dental Surgery
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Cutting efficiency of endodontic files in linear motion a thesis submitted in partial fulfillment ... endodontics ... /Santiago, Rafael. January 1984 (has links)
Thesis (M.S.)--University of Michigan, 1984.
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A study of the structural, dimensional, and physical characteristics of root canal instruments thesis submitted as partial fulfillment ... /Heuer, Michael A. January 1959 (has links)
Thesis (M.S.)--University of Michigan, 1959.
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The stainless steel endodontic file its use in obturation of difficult root canals : a dissertation [sic] submitted in partial fulfillment ... endodontics and radiology ... /Sampeck, Adrian J. January 1961 (has links)
Thesis (M.S.)--University of Michigan, 1961.
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Physical properties of root canal sealers containing calcium hydroxide a thesis submitted in partial fulfillment ... endodontics ... /Hyde, Dean G. January 1986 (has links)
Thesis (M.S.)--University of Michigan, 1986.
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Physical properties of root canal sealers containing calcium hydroxide a thesis submitted in partial fulfillment ... endodontics ... /Hyde, Dean G. January 1986 (has links)
Thesis (M.S.)--University of Michigan, 1986.
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Two dimensional photoelastic stress analysis of endodontic preparationsGut, Dennis M. January 1978 (has links)
Thesis (M.S.)--University of Michigan, Ann Arbor, 1978. / Typescript (photocopy). eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 59-61).
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