舌侧矫治技术不同长度牵引钩整体内收前牙牙齿移动趋势的三维有限元研究  

Tooth movement tendency of en-masse retraction of upper anterior teeth using different length of hooks in lingual bracket system: A 3D finite element model analysis

作　　者：刘代斌 方志欣[1] 周嫣[1] 黄敏方[1] LIU Daibin;FANG Zhixin;ZHOU Yan;HUANG Minfang(530021 Nanning,Department of Orthodontics,People＇ s Hospital of Guangxi Zhuang Autonomous Region,China)

机构地区：[1]广西壮族自治区人民医院口腔正畸科,南宁530021 [2]湖南长沙口腔医院

出　　处：《实用口腔医学杂志》2018年第4期536-539,共4页Journal of Practical Stomatology

基　　金：广西自然科学基金(编号：桂科基2012GXNSFAA053127);广西第十五批“新世纪十百千人才工程”第二层次人选专项资金(编号：20140410_2012205)

摘　　要：目的:分析舌侧矫治技术不同长度牵引钩条件下,滑动法整体内收上前牙时牙移动的生物力学特征。方法:利用所建立的舌侧矫治技术内收上前牙三维有限元模型,分别于上前牙区牵引钩(长度2～10 mm)和腭侧的微种植钉间加力1.5 N,内收上颌前牙并分析其牙列位移趋势。结果:牵引钩长度在4 mm以内时,均表现为上颌切牙牙冠的腭侧移动趋势,从6 mm开始,中切牙和尖牙牙冠出现唇侧移动趋势,并随牵引钩加长唇倾越明显。结论:随着牵引钩的加长,前牙牙冠的腭侧倾斜移动趋势减小,长牵引钩可能更有利于上前牙的整体内收移动。Objective： To analyze the biomechanical characteristics of lingual bracket system during retracting maxillary anterior teeth using different length of hooks with sliding method. Methods： Three-dimensional finit element model（ 3 D-FEM） of lingual brackets system was established,1. 5 N palatal force through hooks length of 2-10 mm between the maxillary lateral incisor and canine and the palatal micro-implant were loaded to retract anterior teeth,the teeth movement tendency were analyzed. Results： When the length of hooks were less than 4 mm,the movement tendency of the crowns of maxillary incisors was all palatal inclination. While,when the hook was longer than 6 mm,the movement tendency of the crowns of maxillary incisors and canines was all labial inclination,the longer of the hook was,the more labial movement tendency was. Conclusion： The lingual inclination movement for the anterior tooth crowns will be reduced when the hook is longer,which may be conductive to the bodily movement of the anterior teeth.

关 键 词：舌侧正畸 三维有限元 前牙内收 生物力学 

分 类 号：R783.5[医药卫生—口腔医学]