单枚Cage 行经椎间孔腰椎椎间融合术的有限元分析

doi:10.3969/j.issn.0258-8021. 2013. 06.017

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摘要探究单枚融合器行经椎间孔腰椎椎间融合术的植入位置对单侧椎弓根螺钉固定腰椎生物力学特性的影响。本研究建立人体腰椎L_4～5节段融合器不同植入位置的经椎间孔腰椎椎间融合术式模型，采用有限元方法比较分析各模型在前屈、后伸、左右侧弯和左右轴向旋转工况下，腰椎活动范围、椎间融合器和椎弓根螺钉系统的应力分布等生物力学特征。结果表明，各术式模型中融合节段的活动范围均较无损模型至少降低82%，融合节段稳定性显著提高。椎间融合器和椎弓根螺钉的应力分布随工况和融合器放置位置不同而存在差异，融合器距离椎弓根螺钉系统越远，融合器和椎弓根螺钉的等效应力值就越大。因此，从腰椎融合稳定性及内固定应力峰值来看，融合器入路侧植入时融合器和椎弓根螺钉两者结合达到相对较好的术式效果。

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	颜文涛¹赵改平^1*方新果¹柏磊磊¹王晨曦¹马童²凃意辉²

关键词 ：经椎间孔腰椎椎间融合术, 融合器位置, 单侧椎弓根螺钉系统, 生物力学特性, 有限元分析

Key words： transforaminal lumbar interbody fusion cage position unilateral pedicle screw system biomechanical characteristics finite element analysis

基金资助:国家自然科学基金（51106099），上海市教委科研创新项目（12YZ109）

引用本文:

颜文涛¹赵改平^1*方新果¹柏磊磊¹王晨曦¹马童²凃意辉²
. 单枚Cage 行经椎间孔腰椎椎间融合术的有限元分析[J]. 中国生物医学工程学报, 2013, 32(6): 762-768.
YAN Wen Tao¹ZHAO Gai Ping^1*FANG Xin Guo¹BAI Lei Lei¹WANG Chen Xi¹MA Tong²TU Yi Hui²

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http://cjbme.csbme.org/CN/10.3969/j.issn.0258-8021. 2013. 06.017 或 http://cjbme.csbme.org/CN/Y2013/V32/I6/762

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