弓丝形变对微种植体舌侧内收上前牙影响的三维有限元分析

doi:10.19439/j.sjos.2018.02.002

上海口腔医学 ›› 2018, Vol. 27 ›› Issue (2): 117-122.doi: 10.19439/j.sjos.2018.02.002

弓丝形变对微种植体舌侧内收上前牙影响的三维有限元分析

张娅¹, 张翼², 姜琴¹, 王华桥¹, 邱靓星¹, 王超¹

1.重庆医科大学附属口腔医院正畸科,口腔疾病与生物医学重庆市重点实验室,重庆市高校市级口腔生物医学工程重点实验室,重庆 401147;
2.重庆市协尔口腔,重庆 400042

收稿日期:2017-08-28 修回日期:2017-10-18 出版日期:2018-04-25 发布日期:2018-05-14
通讯作者: 王超,E-mail：37112882@qq.com
作者简介:张娅（1991-）,女,在读硕士研究所,E-mail：1746792542@qq.com
基金资助:
国家自然科学基金（11402042）; 重庆市基础与前沿研究计划项目（CSTC2015jcyjA10027）; 重庆市卫生计生委资助重点项目（20141012）; 重庆市卫计委面上项目（2013-2-069,2012-2-131,2015MSXM051）

Influence of the arch-wire deformation on movement of the maxillary anterior teeth in the lingual retraction force system with micro-implant anchorage using 3-D finite element analysis

ZHANG Ya¹, ZHANG Yi², JIANG Qin¹, WANG Hua-qiao¹, QIU Liang-xing¹, WANG Chao¹

1.Department of Orthodontics, Affiliated Hospital of Stomatology, Chongqing Medical University,Chongqing Key Laboratory of oral Diseases and Biomedical Sciences,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education. Chongqing 401147;
2.Chongqing Sharedent Clinic. Chongqing 400042, China

Received:2017-08-28 Revised:2017-10-18 Online:2018-04-25 Published:2018-05-14

摘要/Abstract

摘要： 目的:对舌侧矫治系统中,内收弓丝形变及微种植体植入位置对上前牙三维方向移动的影响进行生物力学评价。方法:建立舌侧矫治三维有限元模型,当弓丝为可变形体及刚性体滑动法内收时,微种植体的植入位置设置为距离第二前磨牙与第一磨牙之间的牙槽嵴顶0、3、5、7 mm,分析上前牙的初始位移和牙周膜静水压的大小。结果:舌侧矫治系统中,使用可变形体弓丝内收上前牙,加力瞬间弓丝发生形变,牙初始位移受弓丝形变的作用发生舌向倾斜移动;随着微种植体高度的增加,上颌侧切牙牙冠的初始位移増大。弓丝为刚性体内收时,上前牙发生冠舌向倾斜移动;随着微种植体高度的增加,其位移趋势未发生明显变化。弓丝为可变形体时,上前牙的牙周膜静水压值超过毛细血管压的上限值。弓丝为刚性体时,上前牙的牙周膜静水压值小于毛细血管压的上限值。结论:弓丝形变对牙初始位移及牙周膜静水压影响较大。临床上可考虑使用刚性高的内收弓丝并减小内收力值,以降低牙根吸收风险。

关键词: 舌侧矫治, 弓丝形变, 三维有限元

Abstract: PURPOSE: To evaluate the biomechanical effect of arch wire deformation, height of micro-implant and lever-arm on movement of the maxillary anterior teeth in the lingual retraction force system. METHODS: Nonlinear 3-D finite element model of lingual orthodontic force system with micro-implant was constructed. When the arch-wire was set to be flexible body and rigid body, lingual retraction force system using sliding mechanism, the height of micro-implant and lever-arm was 0, 3, 5, 7 mm to alveolar ridge crest of the middle point of maxillary second premolars and maxillary first molars. The initial movement and hydrostatic pressure of anterior teeth were calculated. RESULTS: In the lingual retraction force system with micro-implant using sliding mechanism, when the wire was set to be flexible body, retroclination primary displacements of maxillary anterior teeth were found because of wire deformation. The maxillary lateral incisor's primary displacement became larger with the height of micro-implant increased. When the wire was set to be rigid body, the teeth tended to be slightly tipping, and with the increase of height of micro-implant, the change of movement tendency was not obvious. High value of periodontal ligament hydrostatic pressure was observed in the lingual retraction force system of maxillary anterior teeth with micro-implant when the wire was flexible, exceeding the capillary pressure. When the wire was rigid, the value of periodontal ligament hydrostatic pressure was small within the upper limit value of capillary pressure. CONCLUSIONS: Deformation of wire has a great influence on initial teeth movement and periodontal hydrostatic pressure. In clinic, using more rigid wire and reducing the initial force may reduce the risk of orthodontic root absorption.

Key words: Lingual orthodontic treatment, The Arch wire deformation, 3-D finite element analysis

中图分类号:

R783.5

张娅, 张翼, 姜琴, 王华桥, 邱靓星, 王超. 弓丝形变对微种植体舌侧内收上前牙影响的三维有限元分析[J]. 上海口腔医学, 2018, 27(2): 117-122.

ZHANG Ya, ZHANG Yi, JIANG Qin, WANG Hua-qiao, QIU Liang-xing, WANG Chao. Influence of the arch-wire deformation on movement of the maxillary anterior teeth in the lingual retraction force system with micro-implant anchorage using 3-D finite element analysis[J]. Shanghai Journal of Stomatology, 2018, 27(2): 117-122.

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弓丝形变对微种植体舌侧内收上前牙影响的三维有限元分析

Influence of the arch-wire deformation on movement of the maxillary anterior teeth in the lingual retraction force system with micro-implant anchorage using 3-D finite element analysis

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