中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (7): 1108-1113.doi: 10.3969/j.issn.2095-4344.0125

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

经椎弓截骨矫正强直性脊柱炎后凸畸形的三维有限元分析

李 栎,谢 江,马 原,李 辉   

  1. 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
  • 出版日期:2018-03-08 发布日期:2018-03-08
  • 通讯作者: 马原,硕士,副教授,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:李栎,男,1986年生,四川省营山县人,汉族,新疆医科大学在读硕士,主要从事脊柱外科研究。
  • 基金资助:

    国家自然科学基金(81360280)

Three-dimensional finite element analysis of pediclesubtraction osteotomy for ankylosing spondylitis with kyphotic deformity

Li Li, Xie Jiang, Ma Yuan, Li Hui   

  1. 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, Master, Associate professor, Department of Spine Surgery, The Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi 830002, Xinjiang Uygur Autonomous Region, China
  • About author:Li Li, Studying for master’s degree, 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:
虚拟手术规划:基于CT数据重建三维模型,在术前模拟手术,为骨折的复位、内固定的选择、手术设计、手术模拟等提供更为准确的依据。
椎弓根截骨术:①不仅短缩了脊柱后柱结构,同时可使脊柱的前中柱相应短缩;②短缩截骨可使前中柱都可达到截骨面骨性接触,使脊柱稳定性增加,远期脊柱融合率会有所改善。但如果截骨部位较高(高于L1水平),脊椎后柱短缩明显,也会造成脊髓形态上的改变,由于脊髓对牵拉刺激非常敏感,有可能会导致严重的神经并发症。
 
摘要
背景:经椎弓根椎体截骨术式矫正效果明显,且矫正度数丢失的发生率较低,一直以来都是强直性脊柱炎后凸矫正首选手术方式。
目的:应用计算机辅助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。
方法:选取1例强直性脊柱炎后凸志愿者,拍摄脊柱全长正侧位片和磁共振扫描。建立强直性脊柱炎后凸三维模型,再生成完整的强直性脊柱炎后凸三维有限元模型。建立3种模型分别模拟3种不同截骨矫形手术方案,截骨角度分别为20°,30°,40°,并分析矫形效果及生物力学分析。

结果与结论:①成功建立了完整强直性脊柱炎后凸截骨矫形三维有限元模型,截骨角度分别为20°,30°,40°的3种不同螺钉钛棒最大主应力分别为54.632,194.230,394.860 MPa;②成功模拟3种不同截骨矫形方案,模型3矫形程度最佳,但应力分布较大,位移明显,内固定后稳定性及内固定失败并发症增加,模型2在矫形程度以及应力分布适中,既获得较佳的矫形程度,同时也降低内固定失败并发症的发生。

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: 0000-0001-6513-5537(李栎)

关键词: 强直性脊柱炎后凸, 生物力学, 有限元分析, 国家自然科学基金

Abstract:

BACKGROUND: The effect of pediclesubtraction osteotomy is obvious, and the incidence of correction degree loss is low. So, it has been the first choice for the correction of ankylosing spondylitis with kyphotic deformity.

OBJECTIVE: To establish a three-dimensional finite element model of ankylosing spondylitis with kyphotic deformity by computer aided software, and to analyze the biomechanical characteristics.
METHODS: A ankylosing spondylitis patient with kyphotic deformity was selected, and spinal full-length anteroposterior images were photographed, and the patient received magnetic resonance imaging. A three-dimensional model of ankylosing spondylitis with kyphotic deformity was established, and then a three-dimensional finite element model of ankylosing spondylitis with kyphotic deformity was generated. Three different types of models were established for three different surgeries at the osteotomy angle of 20°, 30° and 40°. Correction effect and biomechanics were analyzed.
RESULTS AND CONCLUSION: (1) A three-dimensional finite element model of ankylosing spondylitis with kyphotic deformity was successfully established at the osteotomy angle of 20°, 30° and 40°. The maximum principal stresses of three different screw titanium rods were 54.632, 194.230, 394.860 Mpa. (2) Three different surgeries were successfully simulated. The correction degree of the model 3 was optimal, but the stress distribution was large; displacement was obvious. After internal fixation, the complications of stability and internal fixation failure increased. The model 2 had good correction degree, appropriate stress distribution, and decreased complications of fixation failure. 

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, Biomechanics, Finite Element Analysis, Tissue Engineering

中图分类号: