Methods Form a post core with a screw post after resinifying therapy on the distomolar residual root,then make cast alloy crown or porcelain fused to metal crown.

• 方法对43例老年人后牙残根残冠在塑化治疗后应用根管螺纹钉形成桩核,然后再行金属铸造全冠或烤瓷全冠修复。