Objective to explore an effective method for root canal filling and repairing perforation of pulp bottom.
目的寻求有效的充填根管及修复髓室底穿孔的材料。
Conclusion: Amalgam post and core technique is conservative in restoring molars for its curved root canal, big root furcation, C-shaped root canal and large pulp chamfer.
结论：对于根管弯曲、分叉大、髓室大、C型根管的磨牙，银汞桩核技术有着明显的优势。
If teeth tooth decay before boring to the dental pulp cavity, because root canal treatment technology was not developed teeth almost to escape the pull of fate.
以前如果牙齿蛀牙蛀到牙髓腔，由于当时根管治疗的技术并不发达，牙齿几乎难逃拔掉的命运。
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