种植体支抗内收上颌全牙列的三维有限元分析  

Three dimensional finite element analysis of maxillary dentition retraction with micro-implant anchorage

作　　者：刘海波 冯雪 刘莹[2] 李涛[3] 

机构地区：[1]第四军医大学口腔医院正畸科,西安710032 [2]西安交通大学机械工程学院 [3]北京第二炮兵总医院口腔科

出　　处：《实用口腔医学杂志》2012年第3期341-346,共6页Journal of Practical Stomatology

基　　金：陕西省科技计划项目资助(编号:2012JM4036)

摘　　要：目的:研究在种植体支抗内收全牙列的过程中,不同的牵引钩高度对上颌全牙列的生物力学效应和影响。方法:运用螺旋CT,MIMICS、CADTIA和SOLIDWORKS软件,建立微种植体支抗内收全牙列的三维有限元模型,并计算在3 N正畸力负载下上颌全牙列在牵引钩高度为1、4、7、10 mm时的受力大小和初始位移。结果:随着牵引钩高度的增加,矢状向力逐渐增加而垂直向力逐渐减小,上牙列逐渐由顺时针变为逆时针方向旋转。结论:通过改变牵引钩的高度,可以有效地改变上牙列的移动方式;上牙列的阻抗中心的高度位于平面上方9～12 mm之间。Objective： To investigate the biomechanical effects of micro-implant anchorage for en-masse retraction of the maxillary dentition with different retraction hook heights.Methods： The three-dimensional finite element model of the maxillary dentition en-masse retraction with micro-implant anchorage was constructed with CT scanning data,MIMICS,CADTIA and SOLIDWORKS software.Then the force and the initial tooth displacement was calculated when the retraction hook height was 1,4,7 and 10 mm under the load of 3N,respectively.Results： With retraction hook height increasing the sagittal force increased,while the vertical force decreased,the whole upper dentition rotation changed from clockwise to counter-clockwise.Conclusion： 1.The upper dentition movement can be changed effectively by the retraction hook with different heights.2.The center of resistance of maxillary dentition is located 9 to 12 mm above the occlusal plane.

关 键 词：三维有限元 微种植体支抗 生物力学 

分 类 号：R783.6[医药卫生—口腔医学]