Desajuste Marginal de Infra-estruturas metálicas de próteses fixas sobre implantes considerando tipos de pilares, materiais e solda a laser

• Ano de defesa: 2005
• Autor(a) principal: PEREIRA, Richard Esteves
• Orientador(a): GUILHERME, Aderico Santana
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Goiás
• Programa de Pós-Graduação: Mestrado em Odontologia
• Departamento: Ciência da Saúde
• País: BR
• Palavras-chave em Português: Materiais odontológicos; prótese fixa sobre implantes; desajustes marginais
• Palavras-chave em Inglês: Dental Materials; Implant Supported Prosthesis; Marginal Misfit
• Área do conhecimento CNPq: CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA::CLINICA ODONTOLOGICA
• Link de acesso: http://repositorio.bc.ufg.br/tede/handle/tde/1370

The adaptation precision of metallic structures to implant abutments is a very questionable subject and the scientific literature lacks about the alloy that shows an adaptation closer to the ideal. This study had the proposal of: evaluating the vertical marginal misfit levels (in &#956;m) using a digital microscope of one-piece and after laser welding metallic structures of total fixed implant supported prosthesis casted in Nickel-Chrome, Nickel-Chrome-Titanium-Molibidenium and Palladium-Silver alloys and commercially pure Titanium, over two different kinds of abutments and, also, associate the misfit results observed at the one-piece structures phase with the data obtained after the laser welding treatment. After the fabrication of two master models, 40 pre-fabricated copings for both Estheticone and Micro-Unit type abutments were used at the survey. Eight metallic structures were casted with Ni-Cr, Ni-Cr-Ti-Mo, Pd-Ag and Ti-c.p., being two structures for each alloy. The vertical misfit values concerning the relation of the metallic structures and implant abutments from all alloys and on both stages one-piece and after laser welding were tabulated and then submitted to statistical tests. The values were exposed to the ANOVA and the significant statistic means were compared by the Tukey test considering a 5% significance value (p<0.05), as well as the standard deviation. The results evidenced that the one-piece structures showed misfit, but the mean values did not present statistic significant differences. The material (alloys) analysis showed that the Ti-c.p. did not show discrepant mean values, but the same did not occur with the other alloys. The comparison between all alloys showed no significant statistical differences, and, the Pd-Ag alloy (control group) showed the higher misfit mean values at the one-piece phase. The relation between the one-piece and after laser welding phases showed the presence of statistic significant values, based on the mean values (onepiece= 0.0953 &#956;m / laser welding=0.0452 &#956;m) and the marginal vertical misfit after laser welding appeared significantly decreased.