Objective To investigate the directionality of shear bond strength of resin adhesions on hard tissues of human teeth;detecting the micro-morphological changes of bonding interface by SEM.

• 目的 考察牙科树脂类粘接剂与人牙体硬组织剪切粘接强度的方向性，并利用扫描电镜观察微观形态变化。