Finite element analysis of vertebral column decancellation for treatment of ankylosing spondylitis kyphosis

doi:10.3969/j.issn.2095-4344.0040

Abstract

Abstract:

BACKGROUND: Kyphosis in ankylosing spondylitis is a kind of spinal sagittal imbalance; due to center of gravity displaced and complicated biomechanical properties of the spine, the spinal biomechanics after kyphosis correction is little reported.

OBJECTIVE: To establish a three-dimensional finite element model of the spine after osteotomy for kyphosis.

METHODS: A three-dimensional finite element model of kyphosis in ankylosing spondylitis was established, simulating three kinds of osteotomy orthopedic programs (osteotomy angle in 20°, 30° and 40°), and the orthopedic effect and biomechanics were analyzed.

RESULTS AND CONCLUSION: (1) The three-dimensional finite element model of finite element model of kyphosis in ankylosing spondylitis was established successfully, and simulated three kinds of osteotomy orthopedic programs at the angles of 20°, 30°, and 40°. (2) The best osteotomy angle was 30°, the stress distribution was less, and the stress on the T₁₂, L₁, L₂, L₄, L₅, S₁ and rod was 7.346 1, 11.952, 72.783, 81.368, 28.144, 41.114, and 109.69 MPa, respectively. (3) Under 30°osteotomy angle, the postoperative Cobb angle is 1.4°, which not only obtains better orthopedic effect, but also reduces the incidence of complications caused by stress concentration.

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

Xie Jiang, Li Li, Ma Jun-yi, Sui Jiang-tao, Zhu Xu, Ma Yuan. Finite element analysis of vertebral column decancellation for treatment of ankylosing spondylitis kyphosis [J]. Chinese Journal of Tissue Engineering Research, 2018, 22(3): 415-419.

Figures/Tables 3

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