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工程科学与技术:2007,39(4):44-49
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椎板多节段切除对颈椎节间稳定性的影响
(四川大学 生物力学工程实验室,四川 成都 610065)
Biomechanical Effects of Intersegmental Stability Due to Multilevel Cervical Laminectomy
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投稿时间:2006-12-06    
中文摘要: 根据CT数据建立了颈椎C2-C7节段的三维非线性有限元完整模型,并在此模型基础上建立了椎板切除模型。考察了椎板切除术对颈椎节间稳定性的生物力学影响。将C7椎体下表面固定作为边界条件,采用3种加载模式,即于C2椎体上表面施加1.5 Nm分别沿矢状面、冠状面、轴面方向的纯弯矩。通过计算得到了C5、C4-C5、C4-C5-C6椎板切除后节间运动范围相对于完整模型的增加幅度。结果表明,屈伸、侧弯、旋转载荷模式下,3种不同范围的椎板切除均对颈椎的节间稳定性有较大影响。评价颈椎多节段椎板切除应全面考虑屈伸、侧弯、旋转
中文关键词: 颈椎  椎板切除  节间稳定性  有限元法
Abstract:To investigate the biomechanical effects of intersegmental stability due to laminectomy, a three dimensional nonlinear intact C2-C7 FE model was developed. Then the modified FE model was set up to simulate laminectomy for intersegmental stability analysis. The inferior surface of C7 vertebra was constrained in all directions as boundary condition. Pure moment of 1.5 Nm was applied over the top surface of C2 vertebra to simulate the movements of cervical spine under flexion, extension, lateral bending and axial rotation respectively. Results showed that there are apparent effects on intersegmental stability of cervical spine models due to one, two and three level laminectomy. A conclusion can be drawn that the intersegmental stability under all loading models(flexion extension, later bending, axial rotation) due to surgical procedure must be considered to making a biomechanical evaluation on multilevel laminectomy.
文章编号:20070410     中图分类号:    文献标志码:
基金项目:教育部新世纪人才计划资助
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林冬,樊瑜波.椎板多节段切除对颈椎节间稳定性的影响[J].工程科学与技术,2007,39(4):44-49.
.Biomechanical Effects of Intersegmental Stability Due to Multilevel Cervical Laminectomy[J].Advanced Engineering Sciences,2007,39(4):44-49.