Effects of sports beverages and polishing systems on color stability of different resin composites

BACKGROUND: Consumption of certain acidic beverages may alter the physical and esthetic properties of resin composites. AIM: The aim of this study was to evaluate the effects of two sports beverages on color stability of two different types of resin composites polished with different composite polishing systems. MATERIALS AND METHODS: A total of 96 disk-shaped specimens (diameter: 8-mm and thickness: 2-mm) were made from two different resin composites (Cavex Quadrant Universal-LC, and Clearfil-APX). All of the specimens were stored in distilled water for 24 h at 37°C. Color measurements of each specimen were performed using a colorimeter according to the CIEL*a*b* color scale at baseline and after seven days of immersion in two different sports beverages (Powerade and Buzzer). STATISTICAL ANALYSIS USED: The data were evaluated using Kruskal Wallis and Mann-Whitney U tests. RESULTS: Significant differences were found between the mean ΔE values of the groups after seven days of immersion (P < 0.05). The highest level of the mean color change was observed in the Clearfil APX specimens immersed in Powerade (ΔE = 3.5 ± 0.9). Control groups stored in distilled water for both composites exhibited small color changes (ΔE-Cavex-bur = 2.1 ± 1; ΔE-Clearfil APX-bur = 2.1 ± 0.4). CONCLUSION: Sport beverages caused discoloration in the resin composites after seven days.