Effects of handpiece lubrication on resin-based composite bond strength to enamel.

Purpose: To evaluate the effects of handpiece lubrication on the bond strengths of resin-based composite (RBC) to enamel using two different bonding systems.

Materials And Methods: Sixty extracted noncarious human maxillary incisors were imbedded in acrylic resin tray material with the facial surfaces exposed. 320 grit sandpaper was used to create a flat surface of enamel.