...位于 其乳齿牙根的舌侧 (lingual) 位置，至于永久小臼齿 (premolar) 的牙芽 (bud) 则位于乳齿大臼齿的牙根分叉 (root furcation) 内。
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root furcation lesion 根分叉区病变
root furcation anatomy 根分叉解剖
root furcation lesion exploration 根分叉病变的探查
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。
Methods Hemisections were performed on reserved canals of incomplete tooth fracture, complete root fracture and furcation involvement after root canal therapy.
方法选择隐裂、根折或根分叉病变患者，对欲保留牙根进行根管治疗后，行半牙切除术。
Methods: The residual crown and root of large furcation molars by full root-fill were chosen. Then casting anatomy bolt post-core molars are restored with finely casting full crowns.
方法：选择牙根分叉较大的磨牙残冠残根，经完善根管充填后，制作分体栓道式铸造桩核，然后精密铸造金属全冠修复。
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