新型腰椎侧前逆向椎弓根钉固定的有限元分析
DOI:
作者:
作者单位:

中国人民解放军南部战区总医院

作者简介:

通讯作者:

中图分类号:

基金项目:


Finite Element Analysis of Lateral Lumbar Interbody Fusion Constructs with novel anterior pedicle screw Fixation
Author:
Affiliation:

1.PLA General Hospital of Southern Theatre Command: People'2.'3.s Liberation Army General Hospital of Southern Theatre Command

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    目的 有限元分析评估新型腰椎侧前逆向椎弓根钉固定的生物力学特性。 方法 建立正常人体下腰椎有限元模型(L3~S1)并验证其有效性,而后建立五种内固定模型,侧前方逆向椎弓根螺钉钉板系统(4钉,ALPSP),侧前方逆向椎弓根螺钉棒系统(2钉,ALPSR),侧方椎体螺钉固定(LVS),后路单侧椎弓根螺钉固定(UPS),后路双侧椎弓根螺钉固定(BPS)。利用ANSYS计算各种模型在前屈、后伸、侧屈、旋转等工况下的椎间活动度。记录各组上终板及融合器应力峰值及Von Mises应力云图。 结果 建立了健康人的下腰椎(L3~S1)有限元模型,成功验证其有效性。与完整组比较,ALPSP模型在前屈及左右侧屈控制最佳,而BPS模型在后伸和左右旋转控制最佳,ALPSP模型次之。前屈及左右侧屈的条件下,ALPSP上终板压力峰值最小。后伸及左右旋转条件下,BPS上终板压力峰值最小,ALPSP次之。融合器应力也呈现相应的变化趋势,ALPSP与BPS模型相当。 结论 ALPSP能够提供良好的生物力学稳定性,具有BPS相似的生物力学性能,明显优于LVS和UPS,能降低融合器下沉的风险。

    Abstract:

    OBJECTIVE This study aimed to evaluate the biomechanical effects of lateral lumbar interbody fusion constructs with novel anterior pedicle screw fixation using finite element analysis. METHODS A three-dimensional finite element model of the lumbar vertebrae (L3~S1) was constructed and validated. After the validation of successful modeling, 5 finite element models were constructed, including anterior lumbar pedicle screw and plate (4 crews ALPSP), anterior lumbar pedicle screw and rod (2 crews ALPSR), lateral vertebrae screw (LVS), unilateral pedicle screw (UPS) and bilateral pedicle screw (BPS). Stress peak of superior endplates and cage, Von Mises stress program was noted as well. RESULTS The ROM of the finite element model was consistent with the published data. Compared to the intact group, ALPSP provided the optimal control of ROM at extension left and right lateral bending. BPS provided the optimal control of ROM at flexion, left and right axial rotation In extension left and right lateral bending, the stress peak of superior endplates in ALPSP is minimum and BPS took second place. In the flexion, left and right axial rotation, the stress peak of superior endplates in BPS is minimum and ALPSP took second place. The stress of the cage had the relevant tendency. CONCLUSIONS ALPSP provides favorable biomechanical stability, which is similar to the BPS and superior to LVS and UPS. And it decreases the risk of subsidence of the cage.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2021-06-26
  • 最后修改日期:2022-04-01
  • 录用日期:2022-06-10
  • 在线发布日期:
  • 出版日期: