不同槽沟方向舌侧托槽转矩控制性能三维有限元分析

发布时间：2018-09-03 16:06

【摘要】：目的分析不同槽沟方向的舌侧托槽转矩控制性能以及不同弓丝尺寸、材质对其转矩的影响规律。方法建立上颌前牙垂直槽沟及水平槽沟舌侧托槽、3种材质(不锈钢弓丝、β钛丝、镍钛丝)、2种尺寸(0.43 mm×0.56 mm、0.41 mm×0.56 mm)弓丝的有限元模型,对左上颌中切牙施以±20°的转矩加载,分析对比其力学性能。结果随着弓丝弹性模量的增大,不同槽沟方向的舌侧托槽转矩力矩逐渐增大;槽沟方向对舌侧托槽的转矩性能有影响,但小于弓丝尺寸及材质变化带来的影响。相同转矩角度下,垂直槽沟舌侧托槽产生约为水平槽沟舌侧托槽1~2倍的转矩力。弓丝尺寸对两种托槽转矩控制的影响小于弓丝材质,两者协同变化影响最大。结论槽沟方向、弓丝尺寸、材质改变均能影响舌侧托槽转矩控制性能。临床应用中,可以根据所需转矩力大小,对舌侧托槽槽沟方向及弓丝尺寸、材质组合进行选择。
[Abstract]:Objective to analyze the torque control performance of tongue side bracket with different grooves and the influence of different wire sizes and materials on the torque. Methods the finite element models of three kinds of materials (stainless steel arch wire, 尾 titanium wire, nickel titanium wire) for vertical grooves and horizontal grooves in maxillary anterior teeth (0.43 mm 脳 0.56 mm,0.41 mm 脳 0.56 mm) were established. The torques of left maxillary central incisors were loaded with 卤20 掳torque. The mechanical properties are analyzed and compared. Results with the increase of elastic modulus of arch wire, the torque of tongue side bracket in different grooves increased gradually, and the direction of groove affected the torque performance of tongue side bracket, but smaller than that of arch wire size and material change. At the same torque angle, the torque force of the vertical grooves on the lingual side is about 2 times that of the horizontal grooves. The effect of bow wire size on torque control of two brackets is smaller than that of bow wire material. Conclusion the change of groove direction, arch wire size and material quality can affect the torque control performance of tongue side bracket. In clinical application, according to the required torque force, the direction of the groove on the tongue side and the size and material combination of the arch wire can be selected.
【作者单位】：西南医科大学口腔医学院正畸科;四川大学华西口腔医院正畸科;
【基金】：国家自然科学基金项目(81300903) 川大-泸州战略合作项目(2013CDLZ-S22) 泸州医学院科研基金项目(泸医院科[2009]5号)
【分类号】：R783.5

【相似文献】