中国组织工程研究

中国组织工程研究 ›› 2010, Vol. 14 ›› Issue (13): 2311-2314.doi: 10.3969/j.issn.1673-8225.2010.13.009

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

以三维有限元法验证Spline种植体改性中齿状突起的数目与强度

黄  茜1，李苏伶1，王  聪2，王少安3，王  璐1   

  1. 1 重庆医科大学附属口腔医院修复科，重庆市    400015；2成都市第三人民医院口腔科，四川省成都市  610000；3 四川大学华西口腔医院，四川省成都市  610000
  • 出版日期:2010-03-26 发布日期:2010-03-26
  • 通讯作者: 李苏伶，硕士，主治医师，重庆医科大学附属口腔医院修复科，重庆市 400015 28905594@qq.com
  • 作者简介:黄 茜★，女，1980年生，四川省成都市人，汉族，2005年四川大学华西口腔医学院毕业，硕士，主治医师，主要从事口腔生物力学研究。 13874423@qq.com
  • 基金资助:

    重庆市医学科技计划项目(2008-2-242)“转录活化因子4(ATF4)在种植体植入早期加载骨界面形成中作用及其机制的研究”。

Finite element analysis of stress distribution of Spline implant-abutment joint with different number of projections

Huang Qian1, Li Su-ling1, Wang Cong2, Wang Shao-an3, Wang Lu1   

  1. 1 Department of Prosthodontics, Stomatology Hospital of Chongqing Medical University, Chongqing   400015, China; 2 Department of Stomatology, Chengdu Third People’s Hospital, Chengdu   610000, Sichuan Province, China; 3 West China Hospital of Stomatology, Sichuan University, Chengdu   610000, Sichuan Province, China
  • Online:2010-03-26 Published:2010-03-26
  • Contact: Li Su-ling, Master, Attending physician, Department of Prosthodontics, Stomatology Hospital of Chongqing Medical University, Chongqing 400015, China 28905594@qq.com
  • About author:Huang Qian★, Master, Attending physician, Department of Prosthodontics, Stomatology Hospital of Chongqing Medical University, Chongqing 400015, China 13874423@qq.com
  • Supported by:

    the Medical Science and Technology Development Program of Chongqing, No. 2008-2-242*

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摘要：

背景：关于Spline种植体的前期研究发现，该种植体在不同载荷下的最大应力值均位于Spline齿状突起的根部。
目的：针对Spline种植体齿状突起是其结构中的薄弱部位这一问题，从齿状突起数目方面入手，提出增加其强度的方法的假设：即考虑减少齿状突起的数目从而增大齿状突起的体积来增加强度，并用三维有限元方法检验这一假设的正确性。
方法：采用Pro/Engineer Wildfire 2.0软件建立相同直径和长度，不同突起数目(4个、5个、6个)的Spline连接方式的种植体-基桩模型。通过两种方法修改Spline模型界面，方法A为4个或5个突起的总体积与Spline种植体相同，方法B为4个或5个突起的突起间隔与Spline种植体相同。使用有限元软件Ansys Workbench 9.0进行三维有限元应力分析，对不同模型分别施加垂直200 N、垂直500 N、斜向100 N(45°)载荷，观察不同载荷下不同突起数目的Spline种植体-基桩界面的应力情况，对其进行比较分析。
结果与结论：方法A建立的模型，不论何种载荷下，随突起数目减小Spline突起的应力值均增加。方法B建立的模型，5个突起的种植体应力值较6个突起增大，4个突起的应力值与6个突起相当或稍小。提示通过减少突起数目来增加种植体强度的方法尚需进一步检验。

关键词: 种植体, 基桩, 应力分析, 三维有限元, 接触分析

Abstract:

BACKGROUND: Spline implant has been shown to have maximum stress at Spline projection root under different loading.
OBJECTIVE: To find a way to strengthen the Spline projections from projection numbers, namely to reduce projection number but increase projection volume, and to verify the accuracy by three-dimensional finite element analysis.
METHODS: Pro/Engineer Wildfire 2.0 software was used to establish Spline implant-abutment model with identical diameter and length but different projection numbers (4, 5, 6). The model interface was modified by two methods: by method A, the total volume of 4 or 5 projections was equal to Spline implant; by method B, the projection space of 4 or 5 projections was equal to Spline implant. Three-dimensional finite element analysis was used to determine stress distribution of the implant with different number of projections under vertical 200, 500 N, oblique 100 N (45°) by Ansys Workbench 9.0 software.
RESULTS AND CONCLUSION: For method A, stress on projections of the implant increased with reducing number of projections. For method B, implant with 5 projections displayed greater stress compared with 6 projections, and 4 projections showed similar or a little lower stress compared with implant with 6 projections. Results show that it requires validation to strengthen the Spline projections by reducing projection numbers.

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