Effects of Different Mouthrinses on Color Stability of Resin Composites

Objectives: The aim of this study was to evaluate the effect of three commercially available mouthrinses on color stability of four different resin restorative materials.

Methods: Forty disc shaped specimens (10mm in diameter, 2mm in thickness) were prepared of the restorative materials, Filtek Supreme XT (FS), Aelite LS Packable (AP), Ceram-X (C), Aelite All-Purpose Body (AB). The specimens were incubated in distilled water (37°C, 24h). The baseline color values (L*,a*,b*) of each specimen were measured with a colorimeter according to the CIE-Lab color scale. After baseline color measurements, specimens (n=10/gp) were immersed in one of the three mouthrinses (Listerine, Oral-B, Klorhex) and distilled water as control (20mL, 12h). After immersion, the color values of all specimens were remeasured and the color change value ΔE*ab was calculated. Data were analyzed using two-way ANOVA at a significance level of 0.05.

Results: The nanoceramic restorative material (C) have the highest ΔE*ab values among the other restorative materials tested and there was a significant difference between C and FS, AP and AB (p<0.05). Two-way ANOVA showed that there was also a significant difference among the immersion solutions (p<0.05). Post hoc Tukey HSD test revealed that the difference between the Control and Oral-B groups was statistically significant (p<0.05).

Conclusion: According to the results of the present study, it may be concluded that although visually non perceptible (ΔE*ab<3.3), all resin restorative materials tested showed color difference after immersion in different mouthrinses.