细丝片段弓移动尖牙的三维有限元分析  

Three-dimensional finite element analysis of distalization of lower cuspid with light-segmented archwire technique

作　　者：卢新华[1] 蔡斌[1] 王大为[1] 凌均棨[2] 

机构地区：[1]中山大学光华口腔医学院正畸科,广州510055 [2]中山大学光华口腔医学院牙体牙髓科,广州510055

出　　处：《中华口腔医学杂志》2006年第11期659-660,共2页Chinese Journal of Stomatology

摘　　要：目的分析细丝片段弓移动尖牙的力学机制。方法利用下颌尖牙三维有限元模型,模拟细丝片段弓的临床加载方式,分析尖牙表面的应力分布模式。结果细丝片段弓加载条件下,尖牙牙根近远中、唇舌侧呈较均一的拉应力和压应力分布。近中和远中的拉、压应力平均值分别为0.285、-0.168Pa,唇侧和舌侧的拉、压应力平均值分别为0.097、-0.115Pa。结论细丝片段弓作用下,尖牙呈整体移动模式。Objective To analyze the mechanics of distalizating lower cuspid with the light- segmented archwire. Methods An experiment, which imitated the loading of distalizating lower cuspid with the light-segmented archwire, was performed on the three-dimensional finite element method model of lower cuspid. The patterns of stress distribution of the root were analyzed. Results Under the loading of the light- segmented archwire, the lower cuspid root presented an even pressing force distribution on the distal and lingual side and an even stretching force distribution on the mesial and buccal side. Conclusions The light- segmented archwire would lead to bodily movement of the cuspid.

关 键 词：正畸矫正器 牙应力分析 尖牙 

分 类 号：R783.5[医药卫生—口腔医学]