Effect of acid etching time and a self-etching adhesive on the shear bond strength of composite resin to porcelain.

Abstract

Acid etching of porcelain with 9.6% hydrofluoric acid gel for 120 s provided adequate bond strength for composite repair with a microhybrid composite. When a porcelain restoration is repaired with composite, Single Bond adhesive should be preferred to the AdheSE self-etching adhesive system.