Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (13): 2349-2353.doi: 10.3969/j.issn.1673-8225.2011.13.017

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The finite element analysis of interface stress distribution for TM implant

Wang Su-wen1, Song Guang-bao1, Zeng Shu-guang1, Yao Xiao-hu2, Sun Yu-gang2   

  1. 1Guangdong Provincial Stomatological Hospital, Affiliated Stomatological Hospital of Southern Medical University, Guangzhou  510280, Guangdong Province, China
    2Deparment of Engineering Mechanics, School of Civil Engineering and Transportation, South China University of Technology, Guangzhou  510640, Guangdong Province, China
  • Received:2010-10-21 Revised:2010-11-25 Online:2011-03-26 Published:2013-10-23
  • Contact: Song Guang-bao, Doctor, Chief physician, Guangdong Provincial Stomatological Hospital, Affiliated Stomatological Hospital of Southern Medical University, Guangzhou 510280, Guangdong Province, China songgb@21cn.com Correspondence to: Zeng Shu-guang, Chief physician, Guangdong Provincial Stomatological Hospital, Affiliated Stomatological Hospital of Southern Medical University, Guangzhou 510280, Guangdong Province, China
  • About author:Wang Su-wen★, Studying for master’s degree, Guangdong Provincial Stomatological Hospital, Affiliated Stomatological Hospital of Southern Medical University, Guangzhou 510280, Guangdong Province, China wangsuwen0513@163.com
  • Supported by:

    the Science and Technology Projects of Guangdong Province, No. 2008B030301186*

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Abstract:

BACKGROUND: The morphology of implant is one of important factors determining interface stress distribution for TM implant. The TM implant bone interface stress distribution of comply with anatomic form of human normal jaw bone, which has an instructional significance for selection and design of implant of clinicians.
OBJECTIVE: To observe the characteristics of the stress distribution of TM implant and its surrounding bone tissue under concentrated load.
METHODS: Three-dimensional solid model of mandible has been established from two-dimensional CT pictures through reverse engineering technology. Based on three TM implants with different conical degrees, three different finite element models consisting of corresponding implants and true models of bone in B/2 type were established. The stress distribution characteristics on the bone interface of TM implant and under two different loadings were investigated by using of finite element technology.
RESULTS AND CONCLUSION: The compact bone around TM implant related to a high conical degree bears smaller stresses under vertical loading, while compact bone around TM implant and cancellated bone related to a high conical degree bears the bigger stresses under oblique loading. Besides, stress concentration occurs in the contact interface of upper compact bone and implant, and the bottom of spongy bone in the neck of implant. The stress distribution of bone interface of implant was significantly higher in oblique loading condition than that in vertical loading. Bone interface of TM implant varied from 1/2 length showed a good characteristic of stress distribution under vertical loading.

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