Resistência à flexão e módulo de elasticidade de resinas acrílica e bisacrílica

Abstract

The present study aimed to evaluate the flexural strength and modulus of elasticity of acrylic and bisacrylic resins with and without nylon reinforcement. 40 specimens of acrylic resin (Auto Resin, TDV Dental) and bisacrylic resin (Structur 2 SC, VOCO) with dimensions according to ISO 4049 were prepared. The specimens were divided into 4 groups (n = 10): acrylic resin without reinforcement, reinforced acrylic resin, non-reinforced bisacrylic resin and reinforced bisacrylic resin. After preparation, the specimens were stored in distilled water for a period of 24 hours at room temperature. The flexural strength and modulus of elasticity were obtained through the Universal Instron Machine 3365 with a velocity of 0.5mm / min and a force cell of 500 N. The flexural strength values were submitted to the independent T test, which demonstrated statistically significant difference between the groups with and without bisacrylic resin reinforcement (p = 0.018). Then, the ANOVA test with Bonferroni was performed for flexural strength and modulus of elasticity, showing that of all groups, the acrylic resins were the same as each other, as well as the bisacrylic resins were the same and the acrylic resins were higher. The acrylic resin was superior to the bisacrylic resin for the studied factors. The nylon thread reinforced the bisacrylic resin.