摘要
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。
Analysis of the canine and molar's movement type in different orthodontics force by means of finite element method \ Methods\ A model of canine distal movement, consisting of 323 bricks and 344 nodes, was constructed \ By calculation of the normal deviation S and the horizontal displacement,movement type of canine and anchorage molar in 100 g orthodontics force was analysed by super finite element programe SUPERSAP \ Results\ When the proportion of force to moment is 1∶4 7, the normal deviation of canine distal movement is minimum(S=0 174) Add second promolar and first molar and second molar in anchorage, the horizontal displacement of posterior teeth is minimum(-1 3431) \ Conclusion\ When the proportion of force to moment is 1∶4 7, the canine will translational move distally \ To reinforce anchorage with second molar can prevent anchorage teeth movement mesially during canine distal movement \;
出处
《福建医科大学学报》
1999年第3期299-302,共4页
Journal of Fujian Medical University
基金
福建省卫生厅青年科研基金! (9812 2 )
关键词
牙移动
有限元分析
生物力学
尖牙
tooth movement
finite element method
biomechanics
