胸腰椎压缩性骨折患者过伸复位过程中前纵韧带动态力学的有限元分析

依据1例T12椎体单纯压缩性骨折患者的210层Dicom 3.0标准的CT图片建立T12椎体单纯压缩性骨折的有限元模型，在对建立模型的有效性进行验证后模拟过伸复位手法，约束L2下端所有面，给T11椎体上端一个纵向牵引力，分别于T11，T12，L1椎骨棘突顶点给予一个方向垂直朝向椎体、大小为3.0 cm的位移。程序运算，读取前纵韧带的受力情况。建立了几何外型逼真、生物力学特性全面的胸腰段椎体压缩性骨折三维有限元模型，复位手法作用后前纵韧带由松弛变紧张，在不同过伸支点前纵韧带的受力不同。结果提示，过伸复位治疗胸腰椎压缩性骨折疗效确切，前纵韧带在骨折复位中发挥重要作用，利用有限元分析法研究传统手法的作用机制具有实验结果可靠、显示结果直观、节约资源以及手法模拟精确等优点。

Dynamic biomechanics of anterior longitudinal ligament in the treatment of thoracolumbar spine compression fracture by hyperextending: A finite element analysis

Reconstructing the three-dimensional finite element model of compression fracture of T12 based on the 210-layer consecutive CT DICOM format images from one patient of compression fracture of T12 to simulate the hyperextending. Bound the lower of T12, a vertical traction at the top of T11 and a 3.0 cm-displacement toward the vertebra by three steps at the top of spinous process of T11, T12 and L1 was provided. The procedure began computing to read the results about dynamic biomechanical characteristics of anterior longitudinal ligament. A realistic appearance and full biomechanical properties 3D finite element model of thoracolumbar spine compression fracture was established. The anterior longitudinal ligament was changed from relaxation to tension after hyperextending. The stresses of anterior longitudinal ligament were different when the hyperextending fulcrum was different. The treatment effect of thoracolumbar spine compression fracture by hyperextending is exact. The anterior longitudinal ligament plays an important role in the treatment. Finite element analysis of mechanism of traditional practices has many advantages, such as reliable experimental results, direct displaying results, saving resources and accurate simulation.