An in vitro evaluation of microleakage of resin based composites bonded to chlorhexidine-pretreated dentin by different protocols of a universal adhesive system.

Purpose: This study compared microleakage of different resin based composite (RBC) materials bonded to dentin, after chlorhexidine (CHX) application, by different adhesion protocols of a universal adhesive system.

Methods: Class V cavities were prepared on the buccal and lingual surfaces of 40 premolar teeth. The "etch-and-rinse" technique of a universal bond adhesive system (Single Bond Universal Adhesive) was used on buccal preparations, while the "self-etch" protocol was used on the lingual surfaces.