V形曲力学性能的三维有限元分析

发布时间：2018-04-24 21:11

本文选题：有限元分析 + V形曲　；参考：《医用生物力学》2016年01期

【摘要】：目的对不同弓丝材质、尺寸、角度、形状、托槽间距的V形曲进行有限元力学分析,为V形曲的临床应用提供理论参考。方法建立两种材质(不锈钢弓丝、β钛丝)、两种尺寸(0.43 mm×0.64 mm、0.48 mm×0.64 mm)、两种V形曲位置、两种角度(150°、165°)和两种托槽间距(7、10 mm)的V形曲有限元模型,进行模拟加载后,对比分析其力学性能。结果不锈钢弓丝材质V形曲产生的最大作用力值均大于β钛材质V形曲,0.43 mm×0.64 mm弓丝弯制的V形曲作用力均小于0.48 mm×0.64 mm组,对称型V形曲受弓丝尺寸变化更为明显,托槽间距变化对非对称型V形曲作用力力值的影响更为明显。在V形曲形状相同时,V形角度越小,其各托槽作用力越大。结论弓丝材质尺寸、角度形状及托槽间距的改变均能影响V形曲力学行为。在临床应用中,可以根据托槽间距的大小,对V形曲弓丝材质尺寸、角度形状进行选择。
[Abstract]:Objective to provide theoretical reference for the clinical application of V-shaped curve with different arch wire material, dimension, angle, shape and bracket spacing. Methods A finite element model of two kinds of materials (stainless steel arch wire, 尾 titanium wire, two sizes of 0.43 mm 脳 0.64 mm ~ 0.48 mm 脳 0.64 mm), two kinds of V-curved positions, two angles of 150 掳~ 165 掳and two kinds of bracket spacing of 7 ~ 10 mm were established. The mechanical properties were compared and analyzed after simulated loading. Results the maximum force produced by V-shaped bend of stainless steel bow wire was higher than that of 尾 titanium V-shaped wire by 0.43 mm 脳 0.64 mm curve, and the symmetrical V-shaped curve was more obviously changed by the size of bow wire. The effect of the distance between brackets on the force value of asymmetric V-shaped curve is more obvious. The smaller the V-shaped angle is, the greater the bracket force is when the shape of V-shaped curve is the same. Conclusion the changes of the material size, angle shape and bracket spacing of arch wire can affect the mechanical behavior of V-shape bending. In clinical application, the material size and angle shape of V-shaped curved wire can be selected according to the distance between brackets.
【作者单位】：四川医科大学口腔医学院正畸科;都江堰市医疗中心口腔科;重庆市沙坪坝区人民医院口腔科;
【基金】：国家自然科学基金项目(81300903) 厅、市、校联合基金(2014TSX-0060) 四川省科技厅国际合作项目(2012HHZ001) 川人社办发[2015]93号(编号31)
【分类号】：R783.5

【参考文献】