椎体内裂隙的位置和程度影响伤椎稳定性的生物力学分析

余伟波; 梁德; 江晓兵; 叶林强; 姚珍松

doi:10.16016/j.1000-5404.201607156

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椎体内裂隙的位置和程度影响伤椎稳定性的生物力学分析

基础医学 | 更新时间：2026-01-09

- 椎体内裂隙的位置和程度影响伤椎稳定性的生物力学分析
- Biomechanical effects of location and extent of intravertebral vacuum cleft on the stability of osteoporotic vertebrae
- 第三军医大学学报 2017年39卷第4期页码：373-378
- 作者机构：
- 作者简介：
- 基金信息：
  
  卫生部医药卫生科技发展研究中心资助课题(W2012ZT07，W2014ZT256);广东省卫生厅医学科研基金(B2014175)
- DOI：10.16016/j.1000-5404.201607156
  中图分类号：
- 收稿：2016-07-25，
  
  纸质出版：2017-02-28
- 稿件说明：
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余伟波, 梁德, 江晓兵, 等. 椎体内裂隙的位置和程度影响伤椎稳定性的生物力学分析[J]. 第三军医大学学报, 2017,39(4):373-378.

Weibo Yu, De Liang, Xiaobing Jiang, et al. Biomechanical effects of location and extent of intravertebral vacuum cleft on the stability of osteoporotic vertebrae[J]. J Third Mil Med Univ, 2017, 39(4): 373-378.
余伟波, 梁德, 江晓兵, 等. 椎体内裂隙的位置和程度影响伤椎稳定性的生物力学分析[J]. 第三军医大学学报, 2017,39(4):373-378. DOI： 10.16016/j.1000-5404.201607156.

Weibo Yu, De Liang, Xiaobing Jiang, et al. Biomechanical effects of location and extent of intravertebral vacuum cleft on the stability of osteoporotic vertebrae[J]. J Third Mil Med Univ, 2017, 39(4): 373-378. DOI： 10.16016/j.1000-5404.201607156.

摘要

Abstract

Objective

To investigate the biomechanical effects of location and extent of intravertebral vacuum cleft (IVC) on the stability of osteoporotic vertebrae.

Method

Based on previous studies and our established and validated osteoporotic T11~L1 finite element (FE) model

9 IVC FE models in T12 were simulated stepwise. Firstly

the anterior half of cancellous bone with 2 mm in height was resected in different locations adjacent to superior (S) or inferior (I) endplate or in the central (C) of vertebral body

resulting in 3 mild IVC models (S1

I1). Then

the mild IVC models were developed to 6 types of severe IVC by extended resection of the cancellous bone toward either superoinferior (S2

I2) or anteroposterior (S3

I3) direction. The magnitudes and distributions of the von Mises stress in cortical bone of the 9 simulated IVC models as well as intact model were evaluated under all physiologic conditions of loading.

Results

For all IVC models

the maximum von Mises stress appeared in the anterior wall under flexion

followed by posterior wall under extension. In the mild IVC models

the von Mises stress was remarkably increased by at least 17% compared to the intact model when the IVC was adjacent to endplates under flexion. But the increase was. 5% when IVC was located centrally in vertebral body. Furthermore

the maximum stress was increased along the progression of mild to severe IVC models. While less than 3% of maximum stress magnitude increased in the mild model when the extent of IVC expanded toward superoinferior direction in anterior column

more than 8% was increased in the severe IVC model when expanded to the middle column under all the physiological loadings.

Conclusion

Except the central IVC

the majority of IVC models stimulated by varied locations and extents can cause significant instability of injured vertebrae

and thus early vertebral augmentation is required for vertebral stability and prevention of progressive collapse.

关键词

Keywords

references

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