中国组织工程研究

中国组织工程研究 ›› 2010, Vol. 14 ›› Issue (30): 5531-5534.doi: 10.3969/j.issn.1673-8225.2010.30.006

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

种植体螺纹结构及接触面静力和疲劳分析

高  飞1, 2, 3，张恩维1, 2，魏世成2, 4，方  竞1, 2   

  1. 1北京大学工学院，北京市 100871；2 北京大学前沿交叉学科研究院生物医用材料研究中心，北京市  100871；   3 北京源德生物医学工程有限公司，北京市 100176；4 北京大学口腔医院，北京市 100044
  • 出版日期:2010-07-23 发布日期:2010-07-23
  • 通讯作者: 魏世成，教授，北京大学前沿交叉学科研究院生物医用材料研究中心，北京市 100871 sc-wei@pku.edu.cn
  • 作者简介:高飞☆，男，1981年生，山西省襄汾县人，汉族，2008年北京航空航天大学毕业，博士，博士后，主要从事生物医用材料研究。 soarfgoal@gmail.com
  • 基金资助:

    国家重点科技项目(2007CB936103)、北京大学的新兴学科交叉与研究基金(PKUJC2009001)以及北京大学985项目支持。

Analysis of static force and fatigue between thread structure of dental implant and contact surface

Gao Fei 1,2,3, Zhang En-wei 1,2, Wei Shi-cheng 2,4, Fang Jing 1,2   

  1. 1 College of Engineering, Peking University, Beijing  100871, China; 2 Center of Biomedical Materials, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing  100871, China; 3 Beijing Yuande Bio-Medical Engineering Co., Ltd., Beijing  100176, China; 4 School of Stomatology, Peking University, Beijing  100044, China
  • Online:2010-07-23 Published:2010-07-23
  • Contact: Wei Shi-cheng, Professor, Center of Biomedical Materials, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China; School of Stomatology, Peking University, Beijing 100044, China sc-wei@pku.edu.cn
  • About author:Gao Fei☆, Doctor, College of Engineering, Peking University, Beijing 100871, China; Center of Biomedical Materials, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China; Beijing Yuande Bio-Medical Engineering Co., Ltd., Beijing 100176, China soarfgoal@gmail.com
  • Supported by:

    the National Key Scientific and Technological Project, No. 2007CB936103*; Foundation for Interdisciplinary Studies of Peking University, No. PKUJC2009001*; 985 Item of Peking University*

PDF

827

被引次数

17

摘要：

背景：影响牙种植长期稳定可靠的因素很多，其中种植体-骨组织界面，种植体-基台界面和种植体螺纹结合对种植体的长期可靠性有重要的影响。
目的：分析种植体系统螺纹结构及接触面的力学和疲劳性能，研究潜在失效部位。
方法：利用三维建模的方法建立种植体系统和骨组织模型，在Ansys Workbench中进行网格划分，设定材料属性、约束和加载条件，完成种植体系统-骨组织的静力分析和疲劳分析。
结果与结论：利用专业的CAD软件CATIA，建立两段式直基台种植体系统，且该种植体系同具有平台转移，六方定位，锥度密封等特点，种植体结构有代表性。种植体、基台和种植体的尺寸选择参照目前主流厂商的尺寸设计规则，并且螺纹和配合符合机械设计的规范。由于中央螺丝承受拉应力作用，所以整个种植体系统中，中央螺丝与种植体内螺纹上半部分结合处是失效风险最大的区域，同时疲劳安全系数较低。中央螺丝螺纹疲劳断裂也是种植体的潜在危险之一。

关键词: 种植体, 疲劳, 静力分析, 螺纹, 数字化骨科

Abstract:

BACKGROUND: Many factors affluence the stability of dental implant, the implant-bone interface, implant-abutment interface, as well as the thread structure of implant, play a key role in long term reliability.
OBJECTIVE: To analyze static force and fatigue between thread structure of dental implant and contact surface, and to explore the potentially fatigue fracture of dental implant.
METHODS: A three-dimensional model of dental implant and alveolar bone were established by using CAD software CATIA and Ansys Workbench, respectively. Then the static force and fatigue between dental implant and alveolar bone were analyzed after meshing the model, defining attribute, connections, and loading.
RESULTS: A two-segment abutment implant system was constructed using CAD software CATIA. The implant system was characterized by platform transfer, hexagonal location, and taper seal, which represented structure of implants. The size of implant system was designed according to actual sizes and the assemblage was based on standard of mechanical design.    Stress concentrated in screw and interface of dental implant and fatigue safety factor of the region was lower. These are potentially fatigue fracture of dental implant.

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