Finite element modeling of multi-level cervical spinal segments (C3-C6) and biomechanical analysis of an elastomer-type prosthetic disc
Finite element modeling of multi-level cervical spinal segments (C3-C6) and biomechanical analysis of an elastomer-type prosthetic disc
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DOI：
10.1016/j.medengphy.2005.09.006
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发表时间：
2006-07-01
影响因子：
2.2
通讯作者：
Ha, Sung Kyu
中科院分区：
文献类型：
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作者：
Ha, Sung Kyu
利用计算机断层扫描（CT）数据建立了下颈椎多节段C3-C6的三维有限元（FE）模型，并用于研究融合和人工椎间盘假体对下颈椎生物力学行为的影响。本研究中用于建模椎骨的NURBS计算机辅助设计（CAD）数据有助于添加表面贴片布局，以无缝连接软组织，如椎间盘到椎骨上。通过从该几何形状生成网格来完成FE模型。通过与先前发表的实验和数值计算结果的屈曲-伸展，轴向旋转和横向弯矩进行比较，验证了其准确性。在有限元模型中，通过修改完整椎间盘，考虑在C4-C5椎骨之间植入弹性体型椎间盘假体或融合移植物。结果表明，融合减少了约50-70%的流动性，在其水平的考虑负载的情况下。数值结果表明，弹性体的杨氏模量为5.9 MPa的人工椎间盘假体很好地恢复了完整的脊柱的生物力学行为。(c)2005年IPEM。由爱思唯尔有限公司出版。保留所有权利。
A three-dimensional finite element (FE) model for the multi-level lower cervical spinal segment C3-C6 has been developed using computed tomography (CT) data, and applied to study of the effects of the fusion and the artificial disc prosthesis on the biomechanical behavior of the lower cervical spine. The NURBS computer adided dedsig (CAD) data used in this study for modeling the vertebrae facilitate adding surface patch layouts for seamless attachment of the soft tissues, such as intervertebral discs onto the vertebrae. A FE model was completed by generating mesh out of this geometry. Its accuracy was validated by comparing with previously published experimental and numerical results for the flexion-extension, axial rotation, and lateral bending moments. An implantation of an elastorner-type disc prosthesis or fused graft between C4-C5 vertebrae was considered in the FE model by modifying the intact disc. It is shown that the fusion reduced the mobility at its level by about 50-70% for the considered loading cases. It is numerically demonstrated that an elastomer with Young's modulus of 5.9 MPa for the artificial disc prosthesis well restores the biomechanical behavior of the intact spine. (c) 2005 IPEM. Published by Elsevier Ltd. All rights reserved.