复杂性腰椎管狭窄症的有限元建模与分析-第三军医大学学报.doc

复杂性腰椎管狭窄症的有限元建模与分析( 郑琦1 廖胜辉﹡2 应小樟1 石仕元1 汪翼凡1 刘耀生3 1. 杭州市红十字会医院骨科，杭州 310003; 2. 中南大学信息科学与工程学院,长沙,410000; 3. 北京军事医学科学院附属307医院,北京, 100039. [摘 要] 目的 精确建立复杂性腰椎管狭窄症LSS的退变腰椎全节段有限元模型，与正常模型进行对比与分析。 方法 选取复杂性LSS患者采集CT数据，采用专用生物力学软件建立退变腰椎全节段模型，同时构建正常材质模型，用相同边界条件进行对比分析。 结果 复杂性LSS腰椎 R323.5; R318.01; O242.21 [文献标识码] [文章编号] FEM Modeling and Analysis of Complex Lumbar Spinal Stenosis ZHENG Qi1, LIAO Sheng-Hui2, YING Xiao-Zhuang1, SHI Shi-Yuan1，FEI Jun1，LIU Yao-Sheng3 1. Department of Orthopaedic, Red Cross Hospital of Hangzhou, 310003; 2. School of Information Science and Engineering, Central South University, Changsha 410083; 3. Beijing Military Medical Sciences affiliated 307 Hospital, Beijing 100039. Abstract: Objective: To establish accurate finite element model of complete lumbar spine with complex lumbar spinal stenosis (LSS), then do comparation and analysis with normal model. Methods: Choose some patient with complex LSS and collect the CT scan data. By using specially designed modeling system, a complete FE model of Lumbar with complex LSS is generated, as well as normal lumbar model. Then, same boundary conditions are applied to do comparation. Results: The result demonstrated that the active movement range of complex LSS decreased 25.4% compared to normal model. There are stress concentration around the endplate and disk at the degenerative intervertebral?disk L4-L5 and adjacent disk L3-L4. Conclusion: The lumbar spine with complex lumbar spinal stenosis has less range of motion and is stiffer compared to normal model, and there are stress concentration at the degenerative intervertebral?dis and adjacent intervertebral?disk. The analysis result is useful to practical clinical diagnosis of lumbar spine with LSS. Key words: Lumbar spine; Lumbar spinal stenosis; Finite element method; Biomechanics1 引言 腰椎管狭窄症（Lumbar Spinal Stenosis, LSS）是指由各种原因引起骨质增生或纤维组织增生肥厚，导致腰椎管或神经根管矢状径狭窄而出现的一系列临床综合症[1]。近年来，随着我国人口老龄化程度的加重和医学影像诊断技术的发展，发病率明显[2]，但国内外很少有相关文献专门进行关于腰椎管狭窄症的有限元分析，特别对复杂性腰