%0 Journal Article %T V 形曲力学性能的三维有限元分析 %A 唐茜 %A 瞿杨 %A 黄思源 %A 何淞 %A 杨四维 %A 黄跃 %J 医用生物力学 %D 2016 %R 10.3871/j.1004-7220.2016.01.56 %X 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。</br>Objective To analyze the mechanical properties of V-bends with different materials, sizes of arch wires, angles, shapes, inter-bracket distances by using finite element method, so as to provide references for clinical practice of V-bends. Methods The finite element models of V-bends were established, including two kinds of materials (stainless steel, titanium-molybdenum alloy), two sizes（0.43 mm×0.64 mm, 0.48 mm×0.64 mm）, two V-bend positions, two angles(150°, 165°),and two inter-bracket distances（7,10 mm）, so as to compare and analyze their mechanical properties after simulative loading. Results The maximum force values produced by V-bends with stainless steel arch wire were greater than that of V-bends with β titanium steel arch wire. The force produced by V-bends with 0.43 mm×0.64 mm arch wire was smaller than that produced by V-bends with 0.48 mm×0.64 mm arch wire. The size of arch wire had a more obvious impact on V-bends with symmetrical arch wire. The force of V-bends with asymmetric arch wire was more evidently influenced by the change of inter-bracket distance. For V-bends with the same shape, the smaller the V-shaped angle, the greater the force on the bracket would be. Conclusions The V-bends with different materials, different sizes of arch wires, different shapes and inter-bracket distances will have different mechanical behaviors. In clinical application, the materials, sizes of arch wires, shapes and angles of V-bends should be adjusted properly according to the inter-bracket distances. %K 有限元分析 %K V形曲 %K 力学特性< %K /br> %K Finite %K element %K analysis %K V-bend %K Mechanical %K properties %U http://www.mechanobiology.cn/yyswlx/ch/reader/view_abstract.aspx?file_no=201601010&flag=1