The effect of different solutions and thermocycling on the Vickers hardness of acrylic resin denture teeth

Abstract

Aim: The aim of this study was to evaluate the effect of artificial saliva,disinfectant solution, distilled water, and thermocycling on Vickershardness of 4 commercial brands of acrylic resin denture teeth.Methodology: Four different brands of acrylic resin denture teeth (MajorDent, Acry Lux, Acry Rock, Imident Lux) were evaluated. 15 anterior and15 posterior teeth of each group embedded in autopolymerized acrylicresin. The occlusal surfaces of posterior teeth and the vestibule surfacesof anterior teeth were flattened by using silicon carbide paper. Afterpolishing, microhardness measurements were repeated three times foreach teeth. The teeth were submitted to different conditions: (1) storagein distilled water at 37±2°C for 7 days; (2) storage in artificial saliva at37±2°C for 30 days and (3) storage in 1 % sodium hypochlorite. After,thermal cycling between 5 and 55 °C for 2500 cycles was made. Themicrohardness measurements were repeated. Data were analyzed withone-way analysis of variance (ANOVA) and Duncan test (p