目的：为了探讨悬臂梁的存在及其长度对种植牙周骨界面应力传递、分布规律的影响。
Objective: To investigate the influence of cantilever lengths on the load transfer and stress distribution patterns of the interface between the bone and dental implants.
方法用根尖定位仪测量36例患牙的每个根管工作长度，并进行比较。
Methods We used the root apex locator to measure work length of each root canal of 36 cases and compared the measured results.
分析了影响螺纹钢牙筋长度的原因。
The cause of influence on reinforced bar tooth length has been analyzed.
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