Comp?sitos Bulk Fill flu?dos versus resinas compostas tradicionais: comportamento mec?nico

• Main Author: Chaves, Let?cia Virginia de Freitas
• Other Authors: 06140107482
• Language: Portuguese
• Published: PROGRAMA DE P?S-GRADUA??O EM SA?DE COLETIVA 2017
• Subjects: CNPQ::CIENCIAS DA SAUDE::SAUDE COLETIVA; Resinas compostas; Estresse mec?nico; Fotoativa??o de resinas
• Online Access: https://repositorio.ufrn.br/jspui/handle/123456789/24092

Submitted by Automa??o e Estat?stica ([e-mail]) on 2017-10-05T00:11:28Z No. of bitstreams: 1 LeticiaVirginiaDeFreitasChaves_DISSERT.pdf: 624609 bytes, checksum: 00e1748d54f2f6578477eb5c68293890 (MD5) === Approved for entry into archive by Arlan Eloi Leite Silva ([e-mail]) on 2017-10-16T23:12:07Z (GMT) No. of bitstreams: 1 LeticiaVirginiaDeFreitasChaves_DISSERT.pdf: 624609 bytes, checksum: 00e1748d54f2f6578477eb5c68293890 (MD5) === Made available in DSpace on 2017-10-16T23:12:07Z (GMT). No. of bitstreams: 1 LeticiaVirginiaDeFreitasChaves_DISSERT.pdf: 624609 bytes, checksum: 00e1748d54f2f6578477eb5c68293890 (MD5) Previous issue date: 2017-07-07 === Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) === Objetivos: Avaliar a profundidade de polimeriza??o (PP), tens?o de contra??o (TC), resist?ncia flexural (RF), m?dulo de elasticidade (ME) e a resist?ncia de uni?o (RU) de tr?s comp?sitos Bulk Fill fluidos em compara??o a comp?sitos tradicionais de alta viscosidade. Metodologia: Tr?s comp?sitos Bulk fill fluidos (Filtek BKF, Surefil SDR, X-tra Base) e tr?s tradicionais ( Z250 XT, Grandioso, TPH3) foram utilizados. Para RF/ME, 60 amostras (n=10) em forma de barra (7 mm x 2 mm x 1 mm) foram confeccionadas e avaliadas por meio de uma M?quina de Ensaios Universal (MEU). Para PP e RU, cavidades c?nicas (n=10) preparadas em dentina bovina foram restauradas com os materiais. A PP foi analisada atrav?s da raz?o base/topo de microdureza de superf?cie e a RU pelo teste de push-out numa MEU. A TC foi mensurada em incremento ?nico das Bulk Fill e dois incrementos para as tradicionais em MEU acoplada a um extens?metro (n=5). Os dados foram estatisticamente avaliados por meio dos testes ANOVA 2 fatores e Tukey (p<0,05). Resultados: Para ME, as resinas convencionais apresentaram maiores valores diante de todas as resinas BKF, no entanto para a RF elas foram iguais, com exce??o apenas da BKF da VOCO que foi inferior. Para a PP convencionais e BKF foram estatisticamente semelhantes. Na TC e na RU as BKF apresentaram-se superiores as convencionais, tamb?m com exce??o apenas da Xtra Base Bulk Fill (VOCO) que foi estatisticamente igual as convencionais na RU. Conclus?o: As resinas Bulk Fill flu?das testadas BKF e SDR apresentaram as propriedades mec?nicas testadas superiores ou iguais aos comp?sitos tradicionais, exceto o m?dulo de elasticidade. === Objectives: To evaluate depth of polimerization (DP), contraction strress (SC), flexural strenght (FS), elastic modulus (EM) and bond strength (BS) of three low-viscosity Bulk Fill composites resin compare as of high-viscosity traditional composites. Methods: Three Bulk fill composites (Filtek BKF, Surefil SDR, X-tra Base) and three traditional ( Z250 XT, Grandioso, TPH3) were used. For FS/ME, 60 (n=10) bar specimens (7 mm x 2 mm x 1 mm) were prepared and evaluated with Universal Testing Machine (UTM). For DP e BS, conical cavities (n=10) were prepared in bovine dentine and restored with materials. DP was analyzed trough the ratio base/top with microhardness of surface and BS on the push-out test in UTM. SC was measured for to increment one of Bulk Fill Resins and two increments of traditional resins in UTM attached to a extensometer (n=5). The data were statistically evaluated by ANOVA 2-way/Tukey (p<0,05). Results: For EM the conventional resins show higher values compare to all the BKF resins, however for the FS they were the same, except for only the VOCO Bulk Fill that was inferior. For the PP, conventional and BKF were statistically similar. In TC and in BS the BKF were superior to conventional, also with the exception of Xtra Base Bulk Fill (VOCO), which was statistically the same as the conventional ones in the BS. Conclusion: The Bulk Fill composites resin BKF and SDR present most of property physical and mechanical higher or similar than traditional composites, except the elastic modulus.