Finite element analysis of vertebral column decancellation for treatment of ankylosing spondylitis kyphosis
10.3969/j.issn.2095-4344.0040
- VernacularTitle:去松质骨截骨治疗强直性脊柱炎后凸畸形的有限元分析
- Author:
Jiang XIE
1
;
Li LI
;
Jun-Yi MA
;
Jiang-Tao SUI
;
Xu ZHU
;
Yuan MA
Author Information
1. 新疆医科大学第六附属医院脊柱外一科
- From:
Chinese Journal of Tissue Engineering Research
2018;22(3):415-419
- CountryChina
- Language:Chinese
-
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, S1and 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.
