经过牙髓治疗而保留的残根、残冠,如不松动,长期无症状,可行桩冠修复。这样既保存了可利用的残根、残冠,为牙齿修复创造了条件,又可使牙槽骨不致过早、过多的吸收。1.病例选择:①长期无症状,不松动的残根、残冠。②x线检查,根端暗影不超过1cm,经过完善的根管治疗后,观察1个月,无症状,x线复查 After the endodontic treatment of residual roots, residual crown, if not loose, long-term asymptomatic, viable post crown repair. This will not only save the available residual roots, residual crown, created the conditions for the restoration of teeth, but also the alveolar bone can not be too early, too much absorption. 1. Case Selection: ① long-term asymptomatic, not loose residual roots, residual crown. ② ray examination, the shadow of the root end of not more than 1cm, after a sound root canal therapy, observed 1 month, asymptomatic, x-ray review