Abstract
Recently, good bonding performance to dentin has been demonstrated by means of development and improvement of the adhesive systems. The purpose of this study was to evaluate the effect of operating experience on dentin bond strengths of three dentin bonding systems. Eight graduate students and two instructors were selected as the group with and without experience of bonding test respectively. Ground bovine dentin was bonded with one of three dentin bonding systems, Clearfil SE Bond (SE), Single Bond (SB), and AQ Bond (AQ). The specimens were subjected to the conventional tensile bond testing at crosshead speed of 2.0mm/min after 1day storage in water. The highest bond strength were obtained in SE, in which there were no significant differences between instructors and the graduate students. On the other hand, the instructors group recorded a statistically higher bond strengths of SB and AQ than those of the graduate students group. The bond strengths were material and operator dependent. SE showed less technique sensitivity than the other bonding systems.
