中国组织工程研究2017，Vol.21Issue(31)：5019-5024,6.DOI:10.3969/j.issn.2095-4344.2017.31.017
有限元法分析强直性脊柱后凸去松质骨截骨与全脊椎截骨矫形的生物力学特点
Finite element analysis of the biomechanical characteristics of ankylosing kyphosis osteotomy using the vertebral column decancellation and the vertebral column resection
摘要
Abstract
BACKGROUND: Patients with severe ankylosing kyphosis are often treated with orthopedic osteotomy, but with high surgical risk, treatment schemes are individualized, and the biological morphology and mechanical properties of the deformed spine are complex. Meanwhile, the finite element model is more adaptable for biomechanical analysis of the spinal deformity. However, its application in the treatment of ankylosing kyphosis in China was little reported.OBJECTIVE: To establish an ankylosing kyphosis finite element model so as to investigate the relationship between different osteotomy methods and the deformation and stress distribution of the spine.METHODS: A three-dimensional finite element model of ankylosing kyphosis was established, and then imported into ANASYS software, to simulate vertebral column decancellation and vertebral column resection at T12 and L1 levels,respectively. The vertebrae and screw were loaded with the same load, and deformation and stress nephograms were obtained.RESULTS AND CONCLUSION: (1) The deformation of the osteotomy at T12 level was significantly larger than that at L1 level. (2) The stress distribution of the decancellation osteotomy concentrated on the pedicle screw and titanium bar; the stress concentration of vertebral column resection was the intervertebral cage. (3) Individualized surgical treatment of ankylosing kyphosis may influence the selection of the osteotomy segment and osteotomy operation. The osteotomy segment may affect the stability of the spine, and stress distribution of internal fixation is likely related to the method of internal fixation. (4) This conclusion may provide theoretical reference for the biomechanical study of analysing ankylosing kyphosis.关键词
骨科植入物/脊柱植入物/脊柱后凸/强直性脊柱炎/有限元分析/生物力学/应力分析/全脊椎截骨/去松质骨截骨/截骨接触面/截骨节段/截骨方式/国家自然科学基金分类
医药卫生引用本文复制引用
段延辑,马俊毅,李辉,李栎,马原..有限元法分析强直性脊柱后凸去松质骨截骨与全脊椎截骨矫形的生物力学特点[J].中国组织工程研究,2017,21(31):5019-5024,6.基金项目
国家自然科学基金(81360280) the National Natural Science Foundation of China, No. 81360280 （81360280）
