Thesis (M.S.)--University of Michigan, Ann Arbor, 1981. / Typescript (photocopy). Includes bibliographical references (leaves 92-97). Also issued in print.

Thesis (M.S.)--University of Michigan, Ann Arbor, 1981. / Typescript (photocopy). eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 92-97).

Thesis (M.S.)--University of MIchigan, Ann Arbor, 1963. / Typescript (photocopy). Includes bibliographical references (leaves 56-60). Also issued in print.

Thesis (M.S.)--University of MIchigan, Ann Arbor, 1963. / Typescript (photocopy). eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 56-60).

Thesis (M.S.)--University of Michigan, 1968.

Thesis (M.S.)--University of Michigan, 1998. / Includes bibliographical references.

Thesis (M.S.)--University of Michigan, 1968.

Thesis (M.S.)--University of Michigan, 2003. / Includes bibliographical references.

Orientador: Caio Cesar Randi Ferraz / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-16T16:29:46Z (GMT). No. of bitstreams: 1 Brum_JoelsonRodrigues_M.pdf: 5614264 bytes, checksum: b37145c988831b42c354756754fe55e5 (MD5) Previous issue date: 2010 / Resumo: Este estudo teve como objetivo avaliar a influência de diferentes substâncias químicas auxiliares usadas durante o preparo químico-mecânico do canal radicular sobre a qualidade de selamento coronário dos materiais obturadores endodônticos. Oitenta raízes de pré-molares inferiores humanos foram seccionadas, instrumentadas e divididas aleatoriamente em 12 grupos experimentais em função do protocolo de irrigação e do material obturador utilizado (G1- sol. salina / guta-percha + Endofill (GP+E); G2- CLX (clorexidina) gel 2% / GP+E; G3- CLX gel 2% + EDTA (ác. Etileno DiaminoTetracético) 17% / GP+E; G4- EDTA 17% / GP+E; G5- NaOCl (hipoclorito de sódio) 5,25% + EDTA 17% / GP+E; G6- NaOCl 5,25% / GP+E; G7- sol. salina / SRE (SE) (Sistema Resilon Epiphany "self-etching"); G8- CLX gel 2% / SRE (SE); G9- CLX gel 2% + EDTA 17% / SRE (SE); G10- EDTA 17% / SRE (SE); G11- NaOCl 5,25% + EDTA 17% / SRE (SE); G12- NaOCl 5,25% / SRE (SE)). Todos os espécimes foram obturados pela técnica da condensação lateral. As raízes foram armazenadas em estufa à 37ºC e 100% de umidade por 7 dias. Após este período, a microinfiltração coronária foi avaliada por meio da metodologia de filtração de fluido, observando-se a movimentação da microbolha pelo capilar de vidro, sugerindo possíveis falhas na obturação endodôntica. Os dados foram submetidos à avaliação estatística pelo método não paramétrico de Kruskal-Wallis onde os resultados mostraram que todos os grupos apresentaram microinfiltração coronária, que não houve diferença estatística na qualidade do selamento coronário promovido pelos materiais obturadores GP+E e SRE (SE) independente dos protocolos de irrigação utilizados e que o SRE (SE) apresentou selamento coronário mais efetivo com protocolo de irrigação CLX gel 2% + EDTA 17% comparado aos grupos irrigados exclusivamente com NaOCl 5,25% e o grupo obturado com GP+E após protocolo de irrigação CLX gel 2% / Abstract: The aim of this study was to evaluate the influence of different auxiliary chemicals substances used during root canal preparation on the coronal sealing by endodontic distinct obturation material. Eighty roots from human mandibular premolars were sectioned, prepared and randomly divided into 12 experimental groups according to the auxiliary chemical substance and the obturation material used (G1- normal saline / Gutta Percha+Endofill; G2- CLX gel 2% / GP+E; G3- CLX gel 2% + EDTA 17% / GP+E; G4- EDTA 17% / GP+E; G5- NaOCl 5,25% / GP+E; G6- NaOCl 5,25% + EDTA17% / GP+E; G7- normal saline / SRE (SE) (Resilon Epiphany System "self-etching"); G8- CLX gel 2% / SRE (SE); G9- CLX gel 2% + EDTA 17% / SRE (SE); G10- EDTA 17% / SRE (SE); G11- NaOCl 5,25% + EDTA17% / SRE (SE); G12- NaOCl 5,25% / SRE (SE)). All specimens were obturated by the lateral condensation technique. The roots were stored at 37°C and 100% humidity conditions for 7 days. Following, the coronal microleakage was evaluated by the fluid filtration methodology, measuring the movement of a bubble in the capillary glass (µL/min) suggesting possible voids in the endodontic filling. Data were statistically analyzed by the Kruskal-Wallis test. The results showed no statistical difference between the sealers (p>0.05) regardless the chemical irrigating solutions used, and was observed that CLX gel 2% + EDTA 17% / SRE (SE), presented better coronary sealing than all groups that used NaOCl 5,25% alone and the group filled with GP after the irrigation using CLX gel 2% / Mestrado / Endodontia / Mestre em Clínica Odontológica

El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado. / Introduction: Coronal microleakage caused by temporary restorative materials is viewed as one of the reasons for endodontic failure. Efforts have been made in recent years to create a temporary restorative material capable of preventing that problem. Objective: Compare in vitro coronal microleakage of an "experimental cement" and four temporary restorative materials used in endodontics. Methods: Class I cavities were made in 90 premolar teeth divided into 10 groups (n= 9) and evaluated at two time periods (1 and 2 weeks). The "experimental cement" was prepared and then coronal sealing of the teeth was performed with the experimental Cement, F (VOCO), Eugenato (MOYCO), Ketac™ Molar Easymix 3M (ESPE) and Coltosol® F. The pieces were submerged in India ink (Pelikan)for 1 and 2 weeks. Microleakage was evaluated on the interface dentin wall / temporary restoration using a stereo microscope (Leica Microsystems LAS EZ version 2.0.0). Measurement was made in millimeters using the software LAS EZ version 2.0.0. Results: Statistically significant differences were found (p< 0.05) when comparing coronal microleakage in the five temporary restorative materials according to exposure time in ink (1 and 2 weeks). Conclusions: The experimental cement had less microleakage than Coltosol® F and Ketac™ Molar EasyMix 3M (ESPE). However, none of the four materials was capable of completely preventing microleakage. / Revisión por pares