After perfect root canal therapy to the residual root and crown of the front tooth, it is the main repair method to utilize a post and core crown at present.
前牙残根残冠经过完善的根管治疗后，利用桩核冠修复在目前是主要的修复方法。
2
Conclusion to save the tissue of tooth and restore the defect with cast post-core.
结论：应尽量保存牙体组织，其不足部分用核桩恢复。
3
Objective: Comparing of clinic using of prefabricated screw and cast metal post-and-core of posterior tooth.