中国组织工程研究

中国组织工程研究 ›› 2011, Vol. 15 ›› Issue (30): 5526-5530.doi: 10.3969/j.issn.1673-8225.2011.30.005

• 数字化骨科 digital orthopedics • 上一篇    下一篇

三维有限元模型分析3种内固定方式治疗严重腰椎不稳定型骨折的生物力学特点

农鲁明，周  栋，徐南伟   

  1. 南京医科大学附属常州第二人民医院，江苏省常州市  213000
  • 收稿日期:2011-02-23 修回日期:2011-04-18 出版日期:2011-07-23 发布日期:2011-07-23
  • 通讯作者: 周栋，博士，副主任，南京医科大学附属常州第二人民医院，江苏省常州市 213000
  • 作者简介:农鲁明★，男，1977年生，江苏省常州市人，汉族，2003年南京医科大学毕业，硕士，主治医师，主要从事脊柱外科研究。 nongluming1977@hotmail.com

A biomechanical study of three kinds of internal fixation methods in the treatment of lumbar burst fracture based on a finite element method

Nong Lu-ming, Zhou Dong, Xu Nan-wei   

  1. Second People’s Hospital of Changzhou City, Nanjing Medical University, Changzhou  213000, Jiangsu Province, China
  • Received:2011-02-23 Revised:2011-04-18 Online:2011-07-23 Published:2011-07-23
  • Contact: Zhou Dong, Doctor, Second People’s Hospital of Changzhou City, Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
  • About author:Nong Lu-ming★, Master, Attending physician, Second People’s Hospital of Changzhou City, Nanjing Medical University, Changzhou 213000, Jiangsu Province, China nongluming1977@hotmail.com

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356

被引次数

6

摘要：

背景：严重腰椎不稳定型骨折的内固定修复方法未形成统一的观点。
目的：应用三维有限元模型对比分析不同内固定方式治疗严重腰椎不稳定型骨折的生物力学性能。
方法：选取1个健康成年志愿者，用CT图像和Mimics软件建立T12~L2椎体三维模型，模拟L1椎体爆裂性骨折，并分别模拟后路减压短节段椎弓根钉固定、前路减压钛网置入内固定和后路减压内固定+前路椎体次全切除钛网置入内固定3种治疗方法。将模型导入到有限元分析软件Abaqus，施加约束和载荷分别加载260 N压力和10 N•m转矩，模拟3种模型在不同工况下的椎体位移、应力传导情况，以及前后路固定器械的受力情况。
结果与结论：从椎体位移分布情况来看，前后联合内固定方式下的位移要较其他两种内固定方式小。从应力分布情况来看，前后联合内固定方式更加符合载荷分布原则。从生物力学角度来看，前后联合内固定方式优于其他两种内固定方式。

关键词: 腰椎, 爆裂性骨折, 有限元分析, 前路, 后路, 前后联合

Abstract:

BACKGROUND: No reports have been found about comparative study among three different methods to treat lumbar burst fracture through finite element model, which leads to the different ideas of treatment.
OBJECTIVE: To introduce and evaluate the biomechanical features of different internal fixation for treatment of lumbar burst fracture based on a three-dimensional finite element model.
METHODS: A youth volunteer without chronic low back pain and trauma of lumbar was chosen. The CT data were obtained by DICOM format. We used Mimics software to build a three-dimensional finite element model to mimic the fracture of L1 burst fracture, then three different approaches of posterior decompression internal fixation, anterior decompression combined with titanium mush implantation internal fixation and posterior decompression combined with anterior reconstruction internal fixation were performed by the three-dimensional finite element model. These three models were put into Abaqus finite element program, axial load 260N and 10NM torque were loaded, on central compression, flexion, extension, lateral bending respectively to study the corresponding stress and displacement.
RESULTS AND CONCLUSION: The technique of posterior decompression combined with anterior reconstruction internal fixation, in the model of vertical compression, flexion, right lateral bending and left, stability was far more than other two methods. From stress distribution, the anterior combined with posterior approach was corresponding with the principle of load-sharing. The technique of posterior decompression combined with anterior reconstruction internal fixation is better than other two methods biomechanically.

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