Influence of Octacalcium Phosphate addition on physical-mechanical properties of Glass Ionomer Cement

摘要

OBJECTIVE: The aim of this study was to evaluate the influence of octacalcium phosphate (OCP)?addition to conventional glass ionomer cement (GIC). METHODOLOGY: A commercial glass ionomer cement (Vidrion R – S.S. White Artigos Dentários?Ltda – Rio de Janeiro, Brazil) was used in this study. OCP was added to powder in 1.5 and 3 wt%.?GIC without OCP addition was used as control. Specimens were produced to evaluate radiopacity,?setting time and diametral tensile strength of cements. Radiopacity was assessed by phosphor plate?system with alluminium step-wedge for comparison. For setting time determination, Gilmore needle?(100 g) was used to determine final setting reaction. Diametral tensile strength was measured in a?universal testing machine. Data were analyzed by one-way ANOVA at a significance level of 95%. RESULTS: Results showed no statistically significant difference in tested properties with octacalcium?phosphate addition in any concentration. CONCLUSION: OCP addition to GIC did not influence materials properties.