自1984年以来,笔者应用本文方法先后修复后牙牙冠大部缺损约200余例.其缺损程度各有不同.轻者牙冠残存有两个牙面,严重者牙冠只残存有一个牙面.所有病例均采用塑化法治疗根管.观察一周复诊无症状后,根据缺损情况制成本文相应洞形,银汞充填修复冠部缺损。 Since 1984, the author has used this method to repair most of the posterior tooth crowns about more than 200 cases of defects. The degree of defects are different. Light crown there are two residual teeth, in severe cases there is only one tooth crown In all cases, plastic surgery was used to treat the root canal.After observing the asymptomatic one week follow-up, the corresponding hole was made according to the defect, and the amalgam filling was used to repair the coronary defect.