Methods Fifty two fractured crown root posterior molar of 50 patients were treatd by RCT, bonding, flapping and HA hone graft.

• 方法选择50例患者的52颗后牙冠根纵折伴牙周脓肿的患牙进行完整拔除、牙槽窝修整、患牙体外根管治疗、黏接再植、牙周翻瓣植骨术。