目的研究下颌支矢状劈开术（SSRO）常用两种内固定方式对下齿槽神经（IAN）功能的影响。
Objective To evaluate the neurosensory functions of the inferior alveolar nerve(IAN)after two rigid internal fixations for the sagittal split of ramus osteotomy(SSRO)in monkeys.
自动计算相邻牙轮之间牙齿与齿槽的最小啮合间隙和牙齿底部到牙轮内孔的最小壁厚。
Calculate the engaging distance between inserts and slots and the least thickness from bearing to contour of cone automatically.
结论：根管内加齿槽骨钛桩内固定即刻修复年轻恒前牙根折，方法简单可行，临床应用效果好。
Conclusion: This method which can survive the root-fractured young permanent anterior teeth is practical and effective for dental clinic.
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