The effect of alcoholic and nonalcoholic mouthwashes on heat-treated composite resin.

: Studies show that mouthwashes containing alcohol soften the surface of composite resin restorations. The present study determined weight change over time in heat-treated composite resin soaked in alcohol and nonalcohol-containing mouthwashes. The results indicate that samples soaked in mouthwashes containing alcohol gained significantly more weight than samples soaked in nonalcoholic mouthwashes.