自锁托槽配合双丝技术倾斜力学性能的三维数字化分析  

A three-dimensional finite element analysis of the tip mechanical capabilities of self-ligating brackets with double wires

作　　者：周容 何淞 吴稀 白蕊 贺涵 黄跃 

机构地区：[1]西南医科大学附属口腔医院,四川省泸州市646000

出　　处：《中国组织工程研究》2017年第34期5449-5454,共6页Chinese Journal of Tissue Engineering Research

基　　金：四川省医学会青年课题(川学会医字[2016]2号);四川省人力资源和社会保障厅基础研究课题(川人社办发[2015]93号);西南医大校课题([2016]217号2016145)~~

摘　　要：背景:目前临床上自锁托槽的应用越来越广泛,但其双丝技术对牙齿三维方向的控制规律及机制并不完全明了,尤其在倾斜方面的研究更是少见。目的:运用有限元法建立Damon Q托槽搭配不同尺寸弓丝的三维有限元模型,以研究探索自锁托槽运用双丝技术纠正倾斜的力学性能。方法:用Pro/E软件建立不同尺寸的弓丝以及Damon Q托槽模型,分组装配模型后导入软件中进行倾斜力学模拟加载,收集力矩值,绘制相应的曲线图和柱状图。结果与结论:①单丝倾斜运动时,辅弓单丝倾斜力矩值相比同尺寸主弓单丝呈倍数增加;②双丝倾斜移动时,倾斜力矩值大小与主、辅弓丝的尺寸呈正相关,且辅弓丝尺寸的影响大于主弓丝;③结果说明:临床上前牙区牙齿倾斜度较大时,可用主弓单丝先行简单排齐,待倾斜角度减小后加入双丝进行精确调整,而实际应用中则需要正畸医生根据临床实际情况,选择更适宜的弓丝搭配。BACKGROUND： At present, the using of self-ligating brackets is more and more extensive. But it is unclear aboutthe rules and mechanisms underlying the tooth control by double wires in three dimensions, especially in tipping.OBJECTIVE： Using the finite element method to establish different three-dimensional finite models of DamonQ bracketsand archwires with different sizes, and then to explore the tip mechanical properties when using double wire technique.METHODS： Different three-dimensional finite models of DamonQ brackets and archwires with different sizes wereestablished by Pro/E Wildfire5.0. The models were assembled and imported to MSC.Marc.Mentat2005R3 followed bysimulating the tip load, calculating torque moment and drawing the corresponding graph and histogram.RESULTS AND CONCLUSION： （1） With tipping movement of single wire, tipping moment of auxiliary single archwireswas multiplied by the same size as main archwires. （2） With tipping movement of double wires, the tip moment valueincreased when the size of the main or auxiliary archwire increased, and the influence of the size of the auxiliary archwirewas greater than that of the main archwire. （3） When the tilt angle is large, we can simply level the tooth using the mainarchwire first, and then precisely adjust the tooth position with double wires. And in the clinical pratice, orthodontists canchoose the appropriate size of double wires according to their needs.

关 键 词：组织工程 生物相容性材料 有限元分析 生物材料 口腔生物材料 自锁托槽 双丝技术 倾斜 三维数字化分析 Damon Q 辅弓丝 弓丝尺寸 余隙 槽沟 

分 类 号：R318[医药卫生—生物医学工程]