Tip-Edge Plus双丝技术扭转力学性能三维有限元分析

Three-dimensional finite element analysis of torsional mechanical properties of Tip-Edge Plus twin wire technology

运用有限元法探究Tip-Edge Plus托槽应用双丝技术时的扭转力学性能。建立Tip-Edge Plus托槽及不同尺寸材质弓丝的有限元模型,按实验分组分别进行力学加载,收集各组实验数据。实验显示:(1)当弓丝材质相同时,双丝组扭转力矩值均大于单丝组;(2)当弓丝材质不同时,扭转力矩值0. 014镍钛弓丝(Ni Ti)+0. 016 Ni Ti> 0. 020澳大利亚弓丝(Aus)> 0. 018 Aus> 0. 014 Ni Ti+0. 014 Ni Ti> 0. 012 Ni Ti+0. 016 Ni Ti> 0. 016 Aus> 0. 012 Ni Ti+0. 014 Ni Ti> 0. 014Aus。扭转力矩值与扭转角度、弓丝尺寸成正相关,双丝较单丝趋势明显,辅弓丝尺寸的影响较主弓丝大;临床上可根据牙齿的扭转情况选用适合的双丝组合。

To explore the torsion mechanical properties of Tip-Edge Plus brackets with double wire technique by using finite element method. Established the assembly models of Tip-Edge Plus brackets and different arch wire separately according to experimental groups. Then ran and calculated each model,collected relevant data. The results showed that when using the same material arch wires,the torsion moments of the double wire groups were greater than single round wires and when using different material arch wires,the torsion moment: 0. 014 Ni Ti +0. 016 Ni Ti > 0. 020 Aus > 0. 018 Aus > 0. 014 Ni Ti + 0. 014 Ni T > 0. 012 Ni Ti + 0. 016 Ni Ti > 0. 016 Aus > 0. 012 Ni Ti + 0. 014 Ni Ti > 0. 014 inch Aus. Therefore,with the application of auxiliary arch wire,the trends of the torsion moment increasing with torsion angle were obviously,and its amplitude increased more prominent when the auxiliary arch wire’s sizes were increased. While the auxiliary arch wire size changed,the increased amplitude of the torsion moment was much bigger than the main arch wire size changed. Besides,in clinical application,orthodontists can use different couple of double wires according to the torsion of tooth.