斜,单边或双边的杆子配置为单一水平的身体间融合和后脊柱固定:有限元素研究
Andrea Redaelli1, Matteo Panico, Riccardo Cecchinato
1IRCCS Istituto Ortopedico Galeazzi, Milan, Italy.
Turkish neurosurgery
|June 13, 2023
概括
有限元分析比较后脊柱仪器仪表用于腰椎体内融合. 与双侧设置相比,斜和单侧设置减少了更多的运动,但增加了螺丝和杆的应力.
科学领域:
- 脊柱生物力学 脊柱生物力学
- 整形外科手术 整形外科手术
- 有限元素分析的研究.
背景情况:
- 后脊柱仪器仪表对于腰椎体内融合至关重要.
- 存在不同的配置,每个都有潜在的生物力学影响.
- 了解应力分布和运动范围是最佳手术结果的关键.
研究的目的:
- 用有限元素分析 (FE) 来比较三种后部单段仪器模型与L4-L5中的侧侧腰椎间体融合 (LLIF) .
- 评估双边,单边和斜背后仪表配置之间的生物力学差异.
主要方法:
- 创建了三个后置仪器模型:双边 (B),单边 (U) 和斜 (O).
- 用FE分析来比较基于运动范围 (ROM) 的模型,以及脚螺丝和杆的应力.
- 模型模拟了L4-L5与LLIF子的融合.
主要成果:
- 这三种配置都显著减少了ROM.
- 与双边 (96%) 相比,斜和单边模型显示了更大的ROM减少 (92%,95%).
- 与双边模型相比,斜和单边配置对脚螺丝和杆施加了更大的压力,特别是在曲-延伸,横向曲和轴向旋转方面.
结论:
- FE分析证实,所有测试的后部仪器配置都有效地减少了脊柱运动.
- 斜和单侧系统比标准的双侧配置对脚螺丝和杆施加更大的压力.
- 与单边配置相比,斜式配置在曲延伸方面呈现了增加的应力.
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