Análise de tensões em prótese fixa total implantossuportada em função da aplicação de resina acrílica termopolimerizável e do número de pilares

• Autor(a) principal: Lobato, Marina Rechden
• Data de Publicação: 2009
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional PUCRS
• Texto Completo: http://hdl.handle.net/10923/455
• topic: ODONTOLOGIA; PRÓTESE DENTÁRIA; IMPLANTODONTIA; RESINAS ACRÍLICAS; BIOMECÂNICA

The achievement of passive fit of the metal framework results from a meticulous process including clinical and laboratorial procedures. One of the main causes of laboratory distortions is the application of the aesthetic veneering material. The purpose of this study was to evaluate the distribution of tensions on abutments of implant-supported fixed total prosthesis. The effect of the veneering material (acrylic resin) and number of abutments (five or four) was investigated. Four metallic bars cast in Palladium-Silver alloy were fabricated to simulate implant-supported fixed total prosthesis on five dental implants. Strain gauges were fixed on the abutments to measure the tension before and after the application of the veneering material (n=4). The values of tension were measured in two situations: over five or four abutments in the master model. The tension data had a normal distribution and were analyzed by using Two-Way Analysis of Variance. No statistically significant difference was found as a function of the main factors (veneering material P=0.172; number of abutments P=0.523) or the interaction of main factors (P=0.604). The results of this study suggest that the application of acrylic resin veneering do not increase the tension in abutments. In this in vitro study, there was no significant difference between the values of tension in the model with five and four abutments.