Color change of composites on substrates treated with 0.2% chlorhexidine

ABSTRACT Objective To evaluate the effect of 0.2% chlorhexidine digluconate (CHX) as a pretreatment two types adhesive systems on color stability composite resin restorations. Methods Forty bovine teeth were prepared (6x6x2mm) and randomly divided into 4 groups (n=10): SB - total etch (Single Bond 2, 3M ESPE); + CHX dentin with (30 seconds) followed by application; Adh self-etch (AdheSE, Ivoclar Vivadent); application. The restored Filtek Z350XT (3M ESPE) photoactivated for 40 seconds. Color measurements (EasyShade, VITA) performed following CIE Lab scale at baseline, 1 3 months (distilled water/37°C). mean change values (?E) coordinates (L*, a* b*) statistically analyzed (2-way ANOVA, repeated measures, Bonferroni, p <.05). Results showed that there was reddening yellowing restorative material after months, differing (p <.05) from month. There no difference >.05) regarding treatment CHX. Conclusions did not produce greater changes in restorations irrespective type system used. However, time had significant change, regardless substrate treatment.