Effects of Different Whitening Agents on the Color and Translucency of Different Resin Composites

To examine the effects of different whitening agents on the color and translucency of different resin composites, in vitro.

A total of 315 specimens (10.0 ×2.0 mm) were fabricated from two microhybrid (G-aenial anterior [G-Ant]) and (G-aenial posterior [G-Post]) and a nano hybrid (G-aenial A'CHORD [ G-ACH]) resin composites and each group was randomly distributed into seven experimental groups (n=15) as follows; 1- control (C); 2- in-office whitening agent (IOW); 3- at-home whitening agent (AHW); 4- prefilled tray (PT); 5- whitening pen (WP); 6- whitening toothpaste (WT) and 7- whitening mouthwash (WMW). The specimens were subjected to staining except control group before application of the different whitening procedures. The color of specimens was measured after 24 h (T₀), after staining (T₁) and after whitening (T₂). Color change [CIEDE2000 (ΔE₀₀)], translucency parameter (TP) values and changes in whiteness index (WI_D) were calculated. Data were analyzed statistically (p<0.05).

No significant 𝑊I_D differences were detected among the tested resin composites at T₀ and T₁ (p>0.05), whereas a significant difference was observed at T₂ (p<0.005). AHW and IOW produced higher color change than PT, WP, WT and WMR. Significant TP changes were found after the application of IOW and AHW in G-Ant.

The effect of whitening products on the whitening index, color and translucency of resin composites are material and substrate dependent.