Finite element analysis of kyphosis in ankylosing spondylitis treated by different osteotomy methods

doi:10.3969/j.issn.2095-4344.2017.19.014

Abstract

Abstract:

BACKGROUND: Kyphosis in ankylosing spondylitis is sagittal or coronal imbalance, but there is a lack of study on its orthopedic biomechanics, and biomechanics is of great significance for the reconstruction of spinal stability after orthopedic surgery.

OBJECTIVE: To establish a three-dimensional (3D) finite element model of kyphosis in ankylosing spondylitis treated by osteotomy on software, and to analyze its biomechanical properties, thus providing theoretical basis for clinical practice.

METHODS: A 3D finite element model of kyphosis in ankylosing spondylitis was established based on CT data, and the predetermined angle of the osteotomy at L₂was measured. Afterwards, vertebral column decancellation and vertebral column resection were stimulated, and then the biomechanical parameters were analyzed.

RESULTS AND CONCLUSION: (1) The 3D finite element models of kyphosis in ankylosing spondylitis treated by vertebral column decancellation or vertebral column resection at L₃ were established successfully. (2) The stress on the screw and contact at each segment in the vertebral column decancellation group was significantly higher than that in the vertebral column resection group except for S₁. (3) To conclude, both two methods can reconstruct the sagittal balance, but vertebral column decancellation exhibits significantly higher stress on the screw. Indeed, the incidence of internal fixation failure and complications in vertebral column decancellation is higher than that in vertebral column resection at the same segment and angle.

中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程

Key words: Spondylitis, Ankylosing, Kyphosis, Biomechanics, Finite Element Analysis, Tissue Engineering

CLC Number:

R318

Ma Yong, Sikandaer•Siyiti, Ou Yong, Aikeremujiang•Muheremu, Ma Yuan. Finite element analysis of kyphosis in ankylosing spondylitis treated by different osteotomy methods [J]. Chinese Journal of Tissue Engineering Research, 2017, 21(19): 3038-3043.

Figures/Tables 4

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