基于MEAW的平面左右向偏斜治疗的三维有限元研究  

The three-dimensional finite element study on correcting appliance occlusal plane deflection by MEAW arch wire

作　　者：张晗[1,2] 邵玶[1] 闫伟军[1] 

机构地区：[1]哈尔滨医科大学口腔医学院正畸科,黑龙江哈尔滨150001 [2]哈尔滨医科大学口腔医学院口腔解剖生理教研室

出　　处：《中国美容医学》2011年第8期1282-1284,共3页Chinese Journal of Aesthetic Medicine

基　　金：哈尔滨市科技创新人才研究专项资金优秀学科带头人项目(编号:2011RFXYS082)

摘　　要：目的:利用有限元分析法分析采用多曲方丝弓(MEAW)在治疗平面左右向偏斜时牙周膜的应力分布情况,为临床操作提供参考。方法:应用CT扫描数据三维重建上颌牙列三维模型,Pro/E软件建立上颌MEAW和牙周膜的实体模型,将模型导入ANSYS软件,建立牙列-牙周膜-MEAW的有限元模型。对MEAW进行位移偏置,计算牙周膜的应力分布。结果:整体弓丝应力分布较均匀,并且弓丝每个"L"型曲水平部位应力较适度,牙周膜应力分布均匀,利于牙齿的整体移动。结论:控制MEAW的"L"型曲位移使弓丝两侧产生的方向相反、均匀适度的应力,能对左右向平面偏斜产生有效的治疗作用,为临床治疗平面左右向偏斜提供一定的理论依据。Objective The purpose of this article is to study the force system that produced by multi-loop edgewise arch wire while correcting patients with facial asymmetry and canted occlusal plane.Methods The model was derived from computed tomography data,with adequate boundary conditions and tissue characterization,with orthodontic hardware（MEAW） to provide a more accurate re？ection of events during orthodontic therapy.Results It is uniform that overall the stress distribution on the arch wire and the horizontal part of each ＂L＂ loop.Major strain was not concentrated in the PDL,so it should be useful to obtain orthodontic tooth movement.Conclusion The control of displacement provides the moderate press which is in the opposite sides and offering evidence in treatment of skew occlusion plane.

关 键 词：MEAW 平面左右向偏斜 三维重建 有限元分析 上颌牙列 

分 类 号：R783.5[医药卫生—口腔医学]