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腰椎滑脱不同融合术式的三维有限元研究

胡日鹤, 周初松

胡日鹤, 周初松. 腰椎滑脱不同融合术式的三维有限元研究[J]. 实用临床医药杂志, 2010, (13): 41-45. DOI: 10.3969/j.issn.1672-2353.2010.13.012
引用本文: 胡日鹤, 周初松. 腰椎滑脱不同融合术式的三维有限元研究[J]. 实用临床医药杂志, 2010, (13): 41-45. DOI: 10.3969/j.issn.1672-2353.2010.13.012
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HU Ri-he, ZHOU Chu-song. A study of dieffrent lumbar spondylolisthesis fusion surgeries based on three-dimensional Finite Element analysis[J]. Journal of Clinical Medicine in Practice, 2010, (13): 41-45. DOI: 10.3969/j.issn.1672-2353.2010.13.012
Citation: HU Ri-he, ZHOU Chu-song. A study of dieffrent lumbar spondylolisthesis fusion surgeries based on three-dimensional Finite Element analysis[J]. Journal of Clinical Medicine in Practice, 2010, (13): 41-45. DOI: 10.3969/j.issn.1672-2353.2010.13.012
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腰椎滑脱不同融合术式的三维有限元研究

  • 1.

    南方医科大学,广东,广州,510000;

  • 2.

    南方医科大学附属珠江医院,骨科中心,广东,广州,513400

详细信息

  • 中图分类号: R681.5

A study of dieffrent lumbar spondylolisthesis fusion surgeries based on three-dimensional Finite Element analysis

摘要

    摘要
  • 摘要: 目的 通过建立腰椎后路椎间(PLIF)和后外侧(PLF)两种融合术的三维有限元模型, 比较并判断融合后融合节段的稳定性以椎弓根螺钉和融合器上的应力及椎体位移有无显著性差异.方法 利用健康志愿者L1～L5 CT扫描的DICOM数据,通过计算机软件重建腰椎模型,进行有限单元网格划分,在腰4/腰5间置入椎弓根钉内固定系统,然后分别在椎间置入融合器生成腰椎后路椎间融合术式三维有限元模型,在横突间植入自体骨生成腰椎后外侧融合术式三维有限元模型.通过对模型进行轴向加压、前屈,后伸、侧弯及轴向扭转五种加载方法进行实验.结果 建立L4/L5腰椎滑脱模型及后路腰椎椎间融合及腰椎后外侧融合的有限元模型,①观察对模型分别施加轴向压缩、侧弯、前屈、后伸、旋转载荷, PLF应力多集中在椎弓根钉与钛棒连接处、PLIF内固定系统应力为Cage所分散,未见明显应力集中;②对比在五种载荷下两种不同内固定位移PLIF组均小于PLF, P＜0.05.结论 ①建立了L4/L5滑脱不同后路融合术式的三维有限元模型.②在前屈、后伸、压缩、侧弯及扭转载荷下,相比PLF, PLIF位移更小,证实椎体间融合的稳定性优于和椎弓根螺钉内固定加后外侧植骨融合;③ PLF应力多集中在椎弓根钉与钛棒连接处、PLIF内固定系统应力为Cage所分散,未见明显应力集中.
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  • 发布日期:  2010-11-10

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