有限元法模拟退变性腰椎侧凸后路矫形及内固定应力分析研究

项目名称： 有限元法模拟退变性腰椎侧凸后路矫形及内固定应力分析研究

项目编号： No.81460344

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 医药、卫生

项目作者： 邢文华

作者单位： 内蒙古医科大学

项目金额： 47万元

中文摘要： 本研究应用计算机辅助工程软件 (Computer Aided Engineering，CAE)软件建立腰椎运动节段的有限元模型，运用最佳建模方案建立4例退变性腰椎侧凸有限元模型，并对模型有效性进行了验证和材料参数的优化；在证实仿真有效的4例有限元模型上模拟后路侧凸矫形，并对每一椎弓根螺钉应力分布进行测算；通过对椎弓根应力分布分析推算出关键椎节段，二次建模后模拟了 关键椎置钉方案的后路矫形，探讨目前临床上争论比较多的退变性脊柱侧凸近端融合椎以及远端融合椎如何选择的问题，并与实际手术结果进行对比研究。

中文关键词： 退变性腰椎侧凸；有限元法；椎弓根螺钉应力分析；后路矫形

英文摘要： In this study, computer aid engineering (CAE) soft was used to establish finite element model(FEM) of the lumbar function spinal unite (FSU), and compared three different models under several behaviour of the FSU to find out the best modeling method. Then use the optimized modeling method to construct five FEMs of the degenerative lumbar scoliosis and validated the final model. On the basis, we simulated the main steps of the posterior correction surgery using the FEMs and An inverse method based on Finite Element Analysis was used to apply forces to the implant screw model such that it was deformed the same after surgery. Then compared the effective of the Key-segmental instrumentation techniques and all segmental pedicle screws strategy.investigate eorreetion effectiveness with different uPPer instrumented vertebra(UIV) and lowest instrumenied vertebra(LIV).

英文关键词： degenerative lumbar scoliosis;finite element analysis;corrective force analysis of pedicle screw;posterior surgical correction