The Effect of Whitening Mouthrinses on the Color Stability of a BIS-GMA Free Composite Resin: An Invitro Study

Abstract

Purpose: Recently, many whitening mouthrinses have appeared on the market with different ingredients due to their ease in use and low costs. Whether these mouthrinses change the color of composite resins has been a matter of curiosity. In our study, it was aimed to investigate the effect of whitening mouthrinses with different chemical structures on the color stability of a resin composite that does not contain Bis-GMA. Materials and Methods: Seventy specimens (8 mm x 2 mm) were prepared from a Bis-GMA free composite resin. These specimens randomly divided into seven groups, according to the mouthrinses (n=10): Listerine Advanced White, Colgate Optic White, Perfect White Black, Crest 3D White, Pasta Del Capitano, Oral B 3D White Luxe. The control group used in the study was distilled water. After the baseline color measurement values were recorded with a spectrophotometer (Vita Easy Shade V, Vita Zahnfabrik, Bad Sackingen, Germany), the samples were kept in mouthrinses for 24 hours. At the end of the keeping period, color measurements were repeated and changes in color values were calculated (∆Eab) using the CIE L*a*b* color system. Statistical analysis of the values obtained was made according to Kruskal Wallis test . Results: Considering the median color change, samples demonstrated color changes within clinically acceptable limits in whitening mouthrinses after immersion (∆Eab = 1.005 - 2.062). There was no statistically signiőcant difference among the whitening mouthrinses (p =0.183). Conclusions: Whitening mouthrinses used in this study did not cause a signiőcant color change during our holding time in Bis-GMA free composite resin