Bonding of Three Self-etching Priming Adhesive Systems to Bur-cut, Er: YAG-lased and Ultrasonic Vibrated Dentin

Abstract

The purpose of this study was to evaluate the effect of the method of removing carious dentin on resin-composite bond strengths to dentin using three self-etching adhesive systems: G-Bond (GC), One-up Bond F (Tokuyama Dental) or Clearfil Mega Bond (Kuraray Medical). The bur-cut, Er: YAG-lased and ultrasonic vibrated dentin was subjected to micro-tensile bond testing and observation of ultra-structure by scanning electron microscopy. A smear layer was not formed on the dentin surface after removing carious dentin in the case of Er: YAG-lased and ultrasonic vibrated dentin. Clearfil Mega Bond showed significantly higher micro-tensile bond strength to bur-cut and ultrasonic vibrated dentin compared with Er: YAG-lased dentin (p<0.05). One-up Bond F showed significantly higher micro-tensile bond strength to ultrasonic vibrated dentin compared with bur-cut and Er: YAG-lased dentin (p<0.05). It is suggested that the method of removing carious dentin by an ultrasonic vibration device is useful for dentin adhesion when using self-etching adhesive systems.