Objective To cast post core investment by indirect method.
目的 ：用间接法制作铸造桩核熔模。
Special pattern was used to weld core iron to guarantee position accuracy of cast holes;
采用专用胎具焊接芯骨以保证铸孔的位置精度；
The segment was then cast as usual, and the core rod extracted after 1.5 hours.
分部，当时投下往常一样，和核心棒后提取1.5小时。
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。
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。
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