华西口腔医学杂志

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下颌第一磨牙种植体周围应力三维有限元分析

王晓洁,罗教明,陈继镛,张兴栋   

  1. 四川大学生物材料工程研究中心,四川 成都610064
  • 收稿日期:2005-04-25 修回日期:2005-04-25 出版日期:2005-04-20 发布日期:2005-04-20
  • 通讯作者: 罗教明,Tel:028-85410563
  • 作者简介:王晓洁(1978-),女,河南人,硕士研究生
  • 基金资助:
    国家自然科学基金资助项目(30471758)

The Study on Three-dimension Finite Element Analysis of the Stress Distribution in the Mandible Bone around Dental Implants

WANGXiao-jie, LUO Jiao-ming, CHENJi-yong, ZHANG Xing-dong   

  1. Engineering Research Center in Biomaterials, Sichuan University, Chengdu610064, China
  • Received:2005-04-25 Revised:2005-04-25 Online:2005-04-20 Published:2005-04-20

摘要: 目的 探讨精确的有限元分析(FEA)模型建立的方法,使FEA分析计算结果更加真实有效。方法 采用 下颌骨计算机断层扫描(CT)数据、通过计算机图像处理及计算机辅助设计(CAD)技术,获取精确的下颌骨第一磨 牙几何模型。应用FEA技术对圆柱状种植体周围骨内应力分布情况进行分析。结果 种植体周围应力分布具有 高度的非对称性,主要集中于下颌骨舌侧颈部,颊侧主要为拉应力作用,舌侧为压应力作用。结论 基于CT数据 建立的模型能更真实地反映下颌骨的结构特点,使FEA分析结果更趋于真实。

关键词: 应力分布, 牙种植体, 三维有限元分析, 下颌骨模型

Abstract:

Objective The aim of this studywas to investigate howto model an accuracy 3-dimension Finite Element Analysis (3D-FEA) model.Methods Based on computed tomography (CT) scan data of a woman, a 3D finite element model of the first molar on the left was rebuilt by computer imagines process and computer aided design (CAD). Analysis of the stress distribution on a cylinder dental implant and in the bone around itwas conducted.Results The stress distribution showed extremely asymme- try in bucco-lingual section: stress concentrated on the lingual side of the mandible; stress mainlywas tensile in buccal side, and on the contrary compressive in lingual side.Conclusion The resultswere more reliable because this model more really displayed the mandible.

Key words: stress distribution, dental implants, three-dimension finite element analysis, mandible model