Comparison of the Color Stability of Silorane-Based with Methacrylate-Based Resin Composites after Accelerated Artificial Aging

Discoloration is one of the most common reasons for replacement of resin composites. The purpose of this study was to compare the color stability of three Methacrylate-based Resin Composites (Filtek Z250, Filtek Z250x, Filtek Z350xt) with Silorane-based Resin Composites (Filtek P90) after Accelerated Artificial Aging (AAA). In this in vitro study 56 composite discs were prepared (N=14). CIE L*a*b* parameters of each specimen were measured by a reflectance spectrophotometer after 24h and 384 h of AAA. Then Color change (ΔE) of each composite was calculated. Data were analyzed by one way ANOVA, Tukey and paired t-test at the significance level of 0.05. ΔE values of Filtek Z250, Filtek Z250x, Filtek Z350xt and Filtek P90 were 7.77, 5.86, 8.95 and 8, respectively. One way ANOVA demonstrated a significant difference between ΔE values of composites (P˂0.001). Tukey’s test revealed that ΔE value of Filtek Z250xt was significantly lower than those of other composites (P˂0.05). Silorane and methacrylate based composites showed a color change more than the clinically acceptable level (ΔE˃3.3) after AAA. Filtek Z250xt showed the lowest color change and other composites showed relatively similar color change.