ADHESION BETWEEN COLLAGEN DEPLETED DENTIN AND DENTIN ADHESIVES

Purpose : To determine the influence of sodium hypochlorite treatment of dentin on shear bond strength and morphology. Materials and Methods : Shear bond strengths of several dentin bonding agents were compared following specific surface treatments that included manufacturer's dir ections, etching plus sodium hypochlorite, and sodium hypochlorite alo ne. The treated surfaces and interfaces between bonding materials and treated surfaces were observed using an FE-SEM. Results: Acetone-conta ining systems yielded equivalent or higher shear bond strengths when s odium hypochlorite was used following etching, as compared with normal procedures. In these cases it is proposed that the adhesive interacts strongly with the treated surface, that contains a high mineral conte nt.