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

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

Material and methods: 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).

Results: 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.

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