Análisis in vitro de la resistencia a la fractura de estructuras de fibra de carbono termocicladasTrabajo 2º clasificado Premio Mejor Artículo Universidades de la CAM

Abstract

Objective: To compare the resistance to fracture of carbon fiber and acrylic resin structures and with cobalt-chromium alloy and acrilic resin structures after thermal cycling. Material and methods: Five carbon fiber reinforced acrylic resin and five cobalt- chromium alloy embebed in acrylic resin specimens were fabricated. All specimens were thermal cycled from 5º to 55ºC for 5000 cycles with a 30-s dwell time. A three point loading test until fracture of specimens was performed. Results: In two of five specimens separation of carbon fiber from acrylic resin was observed after thermal cycling. The carbon fiber reinforced group presented lower resistance values (305,6 N) while cobalt-chromium group reached an average of 664,8 N (p=0.008). Conclusions: Within the limitations of this study, the resistance to fracture of carbon fiber specimens were significantly lower than cobalt-chormium group. More studies and improvment of carbon fiber reinforced resins are necessary in order to be used as alternative material for implant-supported hybrid prosthesis.