Methods: In this experimental study, 30 disc models (8.5 x 2 mm2) of three composites Z350XT, Grandio, and Herculite XTV Ultra were prepared (from every composite 10 models in two categories for keeping in coffee and distilled water).All specimens were kept in specific solutions for 72 hours. Color measurement was evaluated with spectrophotometry (MINOLTA-Japan) before and after immersion in solution. The results were evaluated with two-way ANOVA and Repeated Measure ANOVA.
Results: The rate of color change in each of the three composites which had been immersed in coffee was significant (P<0.05) and regarding to clinical aspect it was unacceptable rate ( E>3.3). The rate of color changing after immersion in distilled water relating to baseline was not significant(P>0.05).
Conclusions: Based on the methodology and the obtained results, Herculite XRV Ultra showed significantly the least color changes and it is more suitable restorative material in esthetic zone.