中国组织工程研究

中国组织工程研究 ›› 2011, Vol. 15 ›› Issue (48): 8960-8963.doi: 10.3969/j.issn.1673-8225.2011.48.008

• 数字化骨科 digital orthopedics • 上一篇    下一篇

功能梯度牙种植体三维有限元力学分析与结构优化

孙  健1，熊耀阳1，李元超2，孙  芳3，张富强1   

  1. 1上海交通大学医学院附属第九人民医院口腔修复科，上海市口腔医学重点实验室，上海市  200011
    2上海交通大学机械与动力工程学院，上海市   200240
    3上海交通大学数字医学教育部工程研究中心，上海市200030
  • 收稿日期:2011-06-09 修回日期:2011-08-04 出版日期:2011-11-26 发布日期:2011-11-26
  • 通讯作者: 张富强，博士，教授，上海交通大学医学院附属第九人民医院口腔修复科，上海市口腔医学重点实验室，上海市 200011 fqzhang@vip.163.com
  • 作者简介:孙健☆，男，1974年生，上海市人，汉族，2004年上海第二医科大学口腔临床医学毕业，博士，副主任医师，主要从事口腔生物力学、数字化口腔修复方面的研究。 doctorsunjian74@yahoo.com.cn
  • 基金资助:

    上海市自然科学基金(09ZR1416600)；上海交通大学医工结合项目(YG2009MS38)；上海市重点学科(特色学科)建设项目(T0202)；上海市科学技术委员会资助项目(08DZ2271100)

Structural optimization and three-dimensional finite element analysis of functionally graded dental implants

Sun Jian1, Xiong Yao-yang1, Li Yuan-chao2, Sun Fang3, Zhang Fu-qiang1   

  1. 1Department of Prosthodontics, the Ninth Affiliated People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai  200011, China
    2School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai  200240, China
    3Engineering Research Center of Digital Medicine, Ministry of Education, Shanghai Jiao Tong University, Shanghai  200030, China
  • Received:2011-06-09 Revised:2011-08-04 Online:2011-11-26 Published:2011-11-26
  • Contact: Zhang Fu-qiang, Doctor, Professor, Department of Prosthodontics, the Ninth Affiliated People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai 200011, China fqzhang@vip.163.com
  • About author:Sun Jian☆, Doctor, Associate chief physician, Department of Prosthodontics, the Ninth Affiliated People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai 200011, China doctorsunjian74@yahoo.com.cn
  • Supported by:

    Science and Technology Foundation of Shanghai, No. 09ZR1416600*; Biomedical Engineering Integrated Project of Shanghai Jiaotong University, No. YG2009MS38*; Shanghai Key Disciplines (Special Disciplines) Project, No. T0202*; Foundation of Shanghai Science and Technology Commission, No. 08DZ2271100*

PDF

544

被引次数

13

摘要：

背景：将生物活性陶瓷与钛进行整体的梯度设计，从而能最大程度地起到增强种植体早期骨结合与长期稳定的作用。
目的：通过三维有限元方法分析功能梯度牙种植体生物力学特性。
方法：建立功能梯度牙种植体及部分颌骨三维有限元模型。整个功能梯度牙种植体从头部到底部的弹性模量梯度变化分别设计为线性、指数函数、对数函数变化3种情况，以钛种植体为对照组。在Abaqus软件中进行三维有限元应力分析。
结果与结论：与对照组相比，功能梯度牙种植体每一层面上及相应骨界面上的应力均有减小。从种植体头部到底部，种植体表面应力下降为3%~50%，骨界面上应力下降为10%~30%，均以指数函数变化组下降最为明显。提示功能梯度牙种植体的设计能减小种植体与骨界面之间的应力，尤以指数函数变化的设计方案更为明显。

关键词: 功能梯度牙种植体, 三维有限元, 应力, 结构优化, 生物力学

Abstract:

BACKGROUND: The graded design of the titanium and bioceramics will enhance the early osseointegration and maintain the long-term stability.
OBJECTIVE: To investigate the biomechanical behavior of functionally graded dental implant by using three-dimensional finite element method.
METHODS: Three-dimensional elemental models of functionally graded dental implant and partial mandible were established. Three different elastic modulus graded change of functionally graded dental implant were designed: linear, exponential function, logarithmic function, with titanium implant as the control group. Three-dimensional element stress analysis was done by Abaqus software.
RESULTS AND CONCLUSION: Compare to the control group, the stresses were reduced on every level of the implant and bone in the design of the functionally graded dental implant. From the top o the bottom of the implant, the stress on the surface of the implant was reduced by 3% to 50%, while the stress on the implant/bone interface was reduced by 10% to 30%. Among the three graded deigns, the most significant stress reduce was found in the exponential function design. The design of functionally graded dental implant reduce the stresses in the implant/bone interface, the most significant difference is exponential function design.

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