Finite Element And Clinical Treatment Analysis Of Spinal Cord Compression

Objectives:1 the finite element model of thoracic spine was established.2. Analysis the apical vertebra posterior height different thoracic spine kyphosis of the same angle, spinal cord compression stress distribution and change.3 combined with clinical data, to assess the status of spinal cord function and to make relevant adjustments to the surgery program.Methods:1 Collect clinical patients with imaging data, using SolidWorks, mimics and Abaqus finite element analysis software, through the adjustment of related material parameters, establishing three-dimensional finite element model of thoracic spinal cord.2. In based on the three-dimensional finite element model of thoracic spinal cord, to develop three apical vertebra posterior border of the vertebral body height N1, N2, N3 (normal vertebral height of 1/4,1/2,3/4, respectively) and establish spinal kyphosis model. The maximum point of the spinal cord stress (a N1, N2 for B, N3 for C) were analyzed.3 to evaluate the effect of postoperative treatment by using the method of preoperative measurement of the spine.Results:1 In this paper, the three-dimensional finite element model of thoracic spinal cord was established based on the CT and MRI image data. The model consists of 159517 units and 166906 nodes. The biomechanical properties of the spinal cord in different degree of the thoracic spinal cord. This study provides an intuitive and quantitative analysis method for the clinical study of thoracic vertebrae, which provides direct guidance for clinical and experimental research..2 in three models were observed in front of the dural folds caused by compression extrusion on the spinal cord. The rear of the spinal cord is subjected to the same pulling force to change the same. The A position of N1 was higher than N2 and N3, and the N1 spinal cord compression was the most serious. In B position, the stress of N2 spinal cord was decreased compared with the N1 position of a. The N3 model of C position in the spinal cord was less affected by N1 and N2. The different parts of the spinal cord were affected by different forces, but the gray matter of the spinal cord was affected by the stress and white matter, and the posterior horn was larger than the anterior horn. The overall trend of spinal cord stress was slowed by the increase in the posterior margin of the vertebral body, and the difference between the anterior and posterior horns of the gray matter increased.3. According to the reasonable treatment plan with the clinical characteristics of the patients with kyphosis deformity, the kyphosis angle, spinal stiffness three column osteotomy in patients with preoperative formulation of anterior column support and rear compression length, surgery can achieve satisfactory effect and reduce postoperative complications.Conclusions:1 a three-dimensional finite element model of thoracic spinal cord was established. 2 the gray matter of the spinal cord was more subjected than the white matter in the same angle of the spinal deformity. The posterior horn of the spinal cord is more subjected than the anterior horn3 when the kyphosis angle is same, the height of the posterior edge of the same angle has different effects on the function of the spinal cord. The lower height of the posterior vertebral body, the greater the compression of the spinal cord.4 the support of anterior vertebral and the reasonable design of deformity correction can largely avoid the damage of spinal cord compression.