中国临床解剖学杂志 ›› 2014, Vol. 32 ›› Issue (1): 67-71.doi: 10.13418/j.issn.1001-165x.2014.01.016

• 临床生物力学 • 上一篇    下一篇

肾型n-HA/PA66腰椎间融合器在经椎间孔腰椎椎体间融合术中的有限元分析

王晓峰, 欧云生, 蒋电明, 李开庭, 杨博, 刘渤, 安洪   

  1. 重庆医科大学附属第一医院骨科,  重庆   400016
  • 收稿日期:2013-05-28 出版日期:2014-01-25 发布日期:2014-02-11
  • 通讯作者: 欧云生,主任医师,E-mail:ouyunsheng2001@163.com E-mail:spurify@gmail.com
  • 作者简介:王晓峰,男,在读硕士,研究方向:脊柱外科基础与临床
  • 基金资助:

    国家高新技术研究发展(“863”)(2002AA326020);重庆市科学技术委员会科技攻关项目(cstc2012gg-yyjs10018)

A kidney-liked n-HA/PA66 cage In transforaminal lumbar interbody fusion: a finite element analysis

WANG Xiao-feng, OU Yun-sheng, JIANG Dian-ming, LI Kai-ting, YANG Bo, LIU Bo, AN Hong   

  1. Department of Orthopaedics, The First Affiliated Hospital Of Chongqing Medical University, Chongqing, 400016, China
  • Received:2013-05-28 Online:2014-01-25 Published:2014-02-11

摘要:

目的 设计一种新型的“肾形”n-HA/PA66腰椎间融合器(cage),通过三维有限元分析,研究其在经椎间孔腰椎椎间融合术(TLIF)中的生物力学特性。  方法   建立正常人体L3-L5节段三维模型,模拟经椎间孔腰椎椎间融合术,采用有限元分析方法进行应力分析,比较肾型与子弹头型n-HA/PA66腰椎间融合器应力分布的差异。  结果 在前屈、后伸、左右旋转工况下两种不同cage的TLIF手术模型对比,子弹头型cage最大应力分别为32.8、32.8、31.4、31.3、32.8、34.2 MPa,肾型cage最大应力分别为13.2、11.4、10.9、10.1、11.7、11.1 MPa;而且肾型cage应力集中区域小于子弹头型cage。  结论 肾型n-HA/PA66腰椎间融合器固定的椎体应力分布小而均匀,理论上可有效降低cage沉降率。

关键词: n-HA/PA66腰椎间融合器, 有限元分析, 经椎间孔腰椎椎间融合术

Abstract:

Objective To design a new “Kidney” like n-HA/PA66 lumbar fusion cage and analyze the biomechanics of this cage in transforaminal lumbar interbody fusion (TLIF) using the method of finite element analysis. Methods Develop a normal intact three validated model of L3-L5 lumbar segments, compare the biomechanical difference between new kidney-liked cage and usual bullet-liked cage by simulating the TLIF using finite element analysis. Results Compare different TLIF model with the two kinds of cage, the max stress of old cage and new cage was 32.8、32.8、31.4、31.3、32.8、34.2MPa and 13.2、11.4、10.9、10.1、11.7、11.1MPa, separately. And the new cage’s area of stress concentration was smaller than the old cage’s. Conclusion This brand new cage has good biomechanical stability and reduced stress of the cage-endplate interface. This may reduce the sedimentation rate of cage.

Key words: n-HA/PA66 lumbar fusion cage, Finite element analysis, Transforaminal lumbar interbody fusion (TLIF)

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