Análisis in vitro de la fibra de carbono como mesoestructura de prótesis híbridas implantosoportadas

Résumé

Aims: The main purpose of the current investigation was to quantify and compare the fracture resistance, after bending tests, of hybrid implant-supported prostheses to determine the optimal combination of mesostructure and veneering materials from the mechanical point of view, and to verify whether the resistance values obtained in the different groups exceed the limits that may be considered clinically acceptable (900 N). As secondary objects, it was assessed whether the location of the applied load (cantilevers of 10 mm and 13 mm and anterior sector) influences the fracture resistance within each group of materials and among the study groups. Finally, we planned to examine the tested prostheses under microscopy to observe their fracture pattern and to classify the samples by their failure type. Conclusions: For full-arch hybrid implant-supported prostheses with cantilevers up to 13 mm, the optimal combination of materials is cobalt-chromium coated with acrylic. The combination of carbon fiber in the mesostructure with acrylic as veneering material could be indicated in hybrid prostheses with cantilevers up to 10 mm. Carbon fiber mesostructures veneered with composite would only be suitable for hybrid prostheses without cantilevers. The presence of a cantilever and its length are directly associalted with lower fracture load values. Acrylic-veneered cobalt-chromium prostheses and composite-coated carbon fiber restorations predominantly exhibited cohesive failures, while acrylic-veneered carbon fiber prostheses mainly showed a complete break of the prosthetic framework.