中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (7): 1102-1107.doi: 10.3969/j.issn.2095-4344.0124

• 骨与关节生物力学 bone and joint biomechanics • 上一篇    下一篇

去松质骨截骨与全脊柱截骨治疗强直性脊柱炎后凸畸形的有限元分析

谢 江,张玉坤,李 栎,马俊毅,马 原,眭江涛,马 涌,李 辉   

  1. 新疆医科大学第六附属医院脊柱外一科,新疆维吾尔自治区乌鲁木齐市 830002
  • 出版日期:2018-03-08 发布日期:2018-03-08
  • 通讯作者: 马原,副教授 博士生导师,新疆医科大学第六附属医院脊柱外科,新疆维吾尔自治区乌鲁木齐市 830002
  • 作者简介:谢江,1977年生,新疆维吾尔自治区奇台县人,汉族,2002年新疆医科大学毕业,副主任医师,主要从事脊柱外科方面的研究。
  • 基金资助:

    国家自然科学基金资助项目(81360280)

Finite element analysis of vertebral column resection versus vertebral column decancellation in treatment of ankylosing spondylitis kyphosis  

Xie Jiang, Zhang Yu-kun, Li Li, Ma Jun-yi, Ma Yuan, Sui Jiang-tao, Ma Yong, Li Hui   

  1. First Department of Spine Surgery, the Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi 830002, Xinjiang Uygur Autonomous Region, China
  • Online:2018-03-08 Published:2018-03-08
  • Contact: Ma Yuan, Associate professor, Doctoral supervisor, First Department of Spine Surgery, the Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi 830002, Xinjiang Uygur Autonomous Region, China
  • About author:Xie Jiang, Associate chief physician, First Department of Spine Surgery, the Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi 830002, Xinjiang Uygur Autonomous Region, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81360280

摘要:

文章快速阅读:

 

 

文题释义:
脊柱去松质骨截骨术:脊柱去松质骨截骨术矫正强直性脊柱炎后凸畸形的优点是切除椎体后方的骨松质,行截骨断端闭合,前方张开,一方面由于松质骨的切除,使得截骨面皮质骨闭合,更有助于后期骨性融合,而后方闭合及前方张开也有效的减少截骨量。
全脊柱切除术:是指完整切除1个甚至多个脊柱节段,包括相邻的椎间盘结构。该手术主要切除预截骨椎体,以及椎体后方的棘突、椎板、关节突和横突,由于前中柱椎体被完全切除,必须对切除位置进行钛笼支撑植骨,保证脊柱的稳定性。由于对椎体以及后方的结构完全切除,故可以达到同时矫正矢状面和冠状面上的畸形的目的,可以用于重度后凸畸形,其最大截骨角度均优于另外经椎弓根截骨术及去松质骨截骨术。
 
摘要
背景:脊柱矢状面失衡对其生物力学有很大的影响,其复杂的生物力学特性对脊柱后凸截骨方案的设计影响很大。
目的:应用计算机建模软件建立强直性脊柱炎后凸截骨三维有限元模型,并分析生物力学特性,为临床实践提供一定的理论依据。
方法:基于CT数据建立强直性脊柱炎后凸畸形三维有限元模型,测量计算L2节段预截骨角度,模拟去松质骨截骨术和全脊柱截骨术进行截骨,并分析矫形后生物力学。
结果与结论:①建立了完整强直性脊柱炎后凸截骨矫形三维有限元模型,并且模拟手术操作建立L2去松质骨截骨术式和全脊柱截骨术式两种不同术式截骨模型;②导入有限元分析软件Ansys workbench 15.0,脊柱去松质骨截骨模型共划分十节点四面体单元948 874,1 564 477个节点,全脊柱切除截骨模型共划分十节点四面体单元931 969,1 548 812个节点;③加载载荷计算得出:去松质骨截骨术式内固定和截骨面应力高于全脊柱截骨术式,其螺钉等效应力分别为40.946,67.26,493.64,304.05,75.359,146.31 MPa,钛棒等效应力为391.01 MPa;④结果表明,2种不同截骨手术方式均能重建矢状面平衡,但去松质骨截骨应力高于全脊柱截骨,且差距较为明显,在相同节段、相同角度下去松质骨截骨术发生内固定失败并发症的风险高于全脊柱截骨术。

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
ORCID: 0000-0002-6205-9601(谢江)

关键词: 骨科植入物, 数字化骨科, 强直性脊柱炎后凸, 生物力学, 有限元分析, 脊柱截骨术, 去松质骨截骨, 全脊柱截骨, 国家自然科学基金

Abstract:

BACKGROUND: Sagittal imbalance makes significant effect on spinal biomechanics, and choosing osteotomy for ankylosing spondylitis depends on its biomechanics characteristics.

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 L2 was 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 L2 were established successfully. (2) Finite element analysis on Ansys workbench 15.0 showed that the vertebral column decancellation (948 874, 1 564 477 nodes) and vertebral column resection (931 969, 1 548 812 nodes) were meshed and analyzed by 10-node tetrahedron solid element. (3) After loaded, the stress values of the vertebral column decancellation were higher than those of vertebral column resection; the equivalent stress on the screw was 40.946, 67.26, 493.64, 304.05, 75.359, and 146.31 MPa; the equivalent stress on the titanium rob was 391.01 MPa. (4) These results suggest that both two methods can reconstruct the sagittal balance, but vertebral column decancellation exhibits significantly higher stress values. 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, Osteotomy, Tissue Engineering

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