The influence of the modification of etched bovine dentin on bond strengths

摘要

Objective: The aim of this study was to modify demineralized bovine dentin surfaces by application of either 12.5/100 sodium hypochlorite (NaOCl), or 0.1/100 (w/w) Type I collagenase, after conditioning with phosphoric acid, to observe the demineralized surface and to investigate the effect on tensile bond strength. Methods: The NaOCl was applied to etched dentin for 30 s, 1 or 2 min and the collagenase for 1,3 or 6 h. A control group was used without NaOCl or collagenease treatment. Prior to bonding, treated surfaces were examined using an Atomic Force Microscope (AFM).