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目的 用有限元的方法分析尖牙远中移动时尖牙及支抗磨牙不同受力状态下的移动方式。 方法 用超级有限元计算程序 SUPERSAP对分为 344个节点、32 3个单元的尖牙远中移动模型进行分析 ,通过标准偏差值 S和水平位移量的计算 ,了解尖牙受远中牵引力 10 0 g及不同转矩力时的移动形式和支抗磨牙的受力情况。 结果 尖牙受到的远中牵引力及力矩的比例为 1∶ 4.7时 ,其水平位移量的标准偏差值最小 ( S=0 .174) ;将后牙连成整体 ,受力时位移值最小 ( - 1.3431)。 结论 要使尖牙平行远中移动 ,远中牵引力与力矩的最佳比例为 1∶ 4.7;将第二双尖牙、第一、第二磨牙连成整体 ,可减小尖牙远中移动时的支抗消耗。
Objective To analyze the movement of canines and support molars under different stress with finite element method. Methods The canine distal moving model with 344 nodes and 32 3 units was analyzed by super finite element program SUPERSAP. The standard deviation S and horizontal displacement were used to calculate the canine distal traction force of 10 0 g And the different forms of the moment of force movement and the force of supporting molars. Results The standard deviation of horizontal displacement was the smallest (S = 0.174) when the distal traction and torque of canines were 1: 4.7. The posterior teeth were connected as a whole, 1.3431). Conclusion To make the canine move in parallel, the best ratio of distal traction and moment is 1: 4.7. The second bicuspid, the first and the second molars are connected together to reduce the branches Anti-consumption.