Análise das tensões de próteses unitárias implantossuportadas de hexágono interno com diferentes diâmetros e comprimentos de implante

• Autor(a) principal: Andrade, Djeferson Henrique [UNESP]
• Data de Publicação: 2011
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/149343; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2017-01-26/000839297.pdf
• topic: Implantes dentários; Biomecânica; Stress mecânico; Dental implants

Despite the fact of implant-supported prosthesis being the subject of numerous studies, research papers on the biomechanical behavior of internal connection implant-supported prosthesis are few and limited, mainly associated with different lengths and diameters of the implant. The aim of this study was to evaluate the stress distribution on internal hexagon implant-supported prosthesis with different diameter and length, by the method of photoelasticity. 8 models were made in photoelastic resin PL-2 (Vishay Micro-Measurements Group, Inc. Raleigh, NC USA). Each model consisted of a photoelastic resin block (10x30x45 mm) and one internal hexagon implant (Connect Air connection Implant System Ltda., São Paulo, Brazil) with different diameters (4.3 and 5 mm) and lengths (10, 11.5, 13 and 15 mm). The crowns were made with screwed-standard heights and NiCr alloy. It was applied an axial and oblique load of 100N at fixed points on the occlusal surface and patterned by the Universal Testing Machine and the photoelastic fringes were visualized by means of a circular polariscope. The results were photographed and analyzed in a qualitative analysis with the aid of graphic program (AdobePhotoshop). The results for the models of smaller diameter showed areas of stress concentration mainly in the apical region and the models of 5 mm in diameter, isochromatic fringes were uniformly distributed around the body of the implant. In all models, it was observed that the increasing of the diameter and the length produced a smaller number of fringes. It was concluded that: the larger the diameter of implants, the more favorable stress distribution. The higher the length and diameter, the lesser stress concentration