›› 2015, Vol. 35 ›› Issue (6): 464-467.

• 临床研究 • 上一篇    下一篇

上颌埋伏中切牙向新生牙槽骨内移动的三维有限元分析

孟禹彤,房伯君   

  1. 中国医科大学附属盛京医院
  • 收稿日期:2014-11-27 修回日期:2015-02-06 出版日期:2015-06-28 发布日期:2015-07-01
  • 通讯作者: 孟禹彤 E-mail:mytcg41850175@126.com

Three-dimensional finite element analysis of impacted maxillary central incisor movement towards newly born alveolar bone during orthodontic traction

  • Received:2014-11-27 Revised:2015-02-06 Online:2015-06-28 Published:2015-07-01

摘要: 目的 分析拔除多生牙后不同施力时机对埋伏牙矫治效果的影响,为临床矫治上颌唇侧阻生中切牙提供一定的理论依据。方法 建立上颌中切牙唇向阻生的三维有限元模型,于牙槽骨不同愈合时期向埋伏牙施以相同的复位力,分析埋伏牙、牙周膜、牙槽骨的初始应力及位移情况。结果 随着牙槽骨的愈合,牙齿、牙周膜的最大应力与位移、愈合期牙槽骨的最大位移逐渐减小,愈合期牙槽骨的最大应力逐渐增大。结论 阻碍埋伏牙正常萌出的多生牙去除后,可以即刻施力移动埋伏牙。但早期移动时牙齿的倾斜趋势比较明显,建议初期加载力值应适度减小,以利于埋伏牙的整体移动。

关键词: 三维有限元, 埋伏牙, 新生牙槽骨, 受力分析

Abstract: Objective This article was aimed to analyze the influence of different time of force upon orthodontic traction after extracting the supernumerary tooth and provide the traction theory of impacted maxillary central incisor. Methods After constructing 3-dimensional finite element model of impacted maxillary central incisor, we applied equal forces during different healing periods and analyzed the initial force and displacement of impacted central incisor, periodontal membrane and alveolar bone. Results As the healing of alveolar bone, both the maximum force of tooth and periodontal membrane and the maximum displacement of alveolar bone decreased, whereas maximum force of alveolar increased. Conclusions After the elimination of supernumerary tooth, force on the impacted teeth can be applied. But inclination trend of early tooth movement was appearent, so we suggested that the initial force should be smaller which beneficially for the whole movement of the impacted teeth.

Key words: three-dimentional finite, impacted teeth, newly born alveolar bone, stress analysis

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