中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (31): 5019-5024.doi: 10.3969/j.issn.2095-4344.2017.31.017

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

有限元法分析强直性脊柱后凸去松质骨截骨与全脊椎截骨矫形的生物力学特点

段延辑,马俊毅,李 辉,李 栎,马 原   

  1. 新疆医科大学第六附属医院脊柱外科研究所,新疆维吾尔自治区乌鲁木齐市   830002
  • 出版日期:2017-11-08 发布日期:2017-12-01
  • 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研究所,新疆维吾尔自治区乌鲁木齐市 830002
  • 作者简介:段延辑,四川省内江市人,汉族,新疆医科大学在读硕士,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(81360280)

Finite element analysis of the biomechanical characteristics of ankylosing kyphosis osteotomy using the vertebral column decancellation and the vertebral column resection  

Duan Yan-ji, Ma Jun-yi, Li Hui, Li Li, Ma Yuan   

  1. Institute of Spine Surgery, the Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi 830002, Xinjiang Uygur Autonomous Region, China
  • Online:2017-11-08 Published:2017-12-01
  • Contact: Ma Yuan, Associate professor, Doctoral supervisor, Institute of Spine Surgery, the Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi 830002, Xinjiang Uygur Autonomous Region, China
  • About author:Duan Yan-ji, Studying for master’s degree, Institute 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:
全脊椎截骨:即全椎体切除,是截骨矫形中的常用截骨矫形方式,切除截骨节段的整个椎体,相关数据显示该技术可以很好地纠正骨盆倾斜与脊柱冠状面及矢状面畸形,但是手术并发症较多,包括脊髓损伤、胸腔积液、肺部感染及伤口深部感染等严重并发症,同时出血量较大,与手术时间和患者体质量相关。
去松质骨截骨:由301医院的王岩首次提出,具体切除范围包括椎体后方椎板,上下关节突及棘突,对椎体行横Y形截骨,闭合椎体后方,并张开前方截骨面。
 
摘要
背景:严重的强直性脊柱后凸畸形常采用矫形截骨术对患者进行治疗,但脊柱截骨矫形手术风险高,具体治疗方案较为个体化,畸形脊柱的生物形态与力学特性错综复杂。但有限元分析法对不规则物体的生物力学分析有其独特的优势性。目前国内通过有限元建模分析强直性脊柱后凸截骨治疗的生物应力特点鲜有报道。
目的:建立强直性脊柱后凸三维有限元模型,探讨截骨方式选择与全脊柱变形位移趋势及截骨接触面、钛棒、椎弓根螺钉等应力分布的关系。
方法:采用三维医学图形软件构建强直性脊柱后凸全脊柱模型,导入ANASYS有限元分析软件,分别模拟在T12和L1椎体节段行2种截骨方式(全脊椎截骨术与去松质骨截骨术)的4个截骨模型。对椎体及螺钉分别施加相应的载荷,得到4种工况下的一系列变形和应力云图。
结果与结论:①T12椎体截骨加载后各方向轴的全脊柱位移趋势大于L1椎体截骨模型;②去松质骨截骨模型的应力集中部位于后方的内固定装置,全脊椎截骨的生物应力主要集中在钛笼及截骨接触面;③个体化的强直性脊柱后凸畸形手术治疗会影响截骨节段及截骨方式的选择,截骨节段的选择将主要影响全脊柱的变形稳定性,内固定节段的应力分布可能与截骨方式及内固定装置方式相关;④该结论可为强直性脊柱后凸的生物力学分析提供一定的理论参考依据。

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: 0000-0002-7114-3696(段延辑)

关键词: 骨科植入物, 脊柱植入物, 脊柱后凸, 强直性脊柱炎, 有限元分析, 生物力学, 应力分析, 全脊椎截骨, 去松质骨截骨, 截骨接触面, 截骨节段, 截骨方式, 国家自然科学基金

Abstract:

BACKGROUND: Patients with severe ankylosing kyphosis are often treated with orthopedic osteotomy, but with high surgical risk, treatment schemes are individualized, and the biological morphology and mechanical properties of the deformed spine are complex. Meanwhile, the finite element model is more adaptable for biomechanical analysis of the spinal deformity. However, its application in the treatment of ankylosing kyphosis in China was little reported.

OBJECTIVE: To establish an ankylosing kyphosis finite element model so as to investigate the relationship between different osteotomy methods and the deformation and stress distribution of the spine.
METHODS: A three-dimensional finite element model of ankylosing kyphosis was established, and then imported into ANASYS software, to simulate vertebral column decancellation and vertebral column resection at T12 and L1 levels, respectively. The vertebrae and screw were loaded with the same load, and deformation and stress nephograms were obtained.

RESULTS AND CONCLUSION: (1) The deformation of the osteotomy at T12 level was significantly larger than that at L1 level. (2) The stress distribution of the decancellation osteotomy concentrated on the pedicle screw and titanium bar; the stress concentration of vertebral column resection was the intervertebral cage. (3) Individualized surgical treatment of ankylosing kyphosis may influence the selection of the osteotomy segment and osteotomy operation. The osteotomy segment may affect the stability of the spine, and stress distribution of internal fixation is likely related to the method of internal fixation. (4) This conclusion may provide theoretical reference for the biomechanical study of analysing ankylosing kyphosis.

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: Kyphosis, Osteotomy, Finite Element Analysis, Biomechanics, Tissue Engineering 

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