This in-vitro study aimed to assess the effects of whitening toothpastes on color and translucency changes and surface roughness of resin composites. Disk-shaped resin composite samples from each composite (Clearfil Majesty Esthetic, Palfique Estelite Paste, and Charisma Smart) were made and randomly allocated into five groups (n = 10): Crest Pro Health Whitening, Advance White Pro, Sensodyne Extra Whitening, a control group (distilled water), and a positive control group (exposed to only stain). The samples were exposed to a tea solution and brushed for 30 days. Surface roughness and color measurements were performed immediately and at 15 and 30 days. Data were evaluated using three-way ANOVA (α = 0.05). Significant differences were determined among the groups for ΔL, Δb, and ΔE00 values in each resin composite (p 1.8) after 30 days, except for the distilled water. Translucency changes remained below the clinically perceptible threshold (ΔRTP00 0.2 μm), regardless of the whitening toothpaste used. Roughness values did not show significant differences among the toothpastes for each resin composite. Whitening toothpaste with blue covarine did not create a different color change. All whitening toothpastes tested increased the surface roughness, regardless of the type of resin composites evaluated. The type of resin composite had a minimal impact on color and translucency changes when exposed to brushing with various whitening toothpastes.
Yıldızoğlu et al. (Wed,) studied this question.