生物力学研究的有限元分析,用于斜腰体间融合的各种内部固定技术
Qi Yu1,2, Zhuo Lin Zou3, Hui Gen Lu2
1Department of Orthopaedics, Haining People's Hospital, Jiaxing, Zhejiang, 314400, China.
BMC musculoskeletal disorders
|October 12, 2024
概括
双边皮质骨轨迹螺丝 (BCBT) 固定为斜腰间体融合 (OLIF) 提供了卓越的稳定性,减少了运动和应力. 双边脚螺丝 (BPS) 固定可最大限度地减少子和端板应力,而BCBT在整体脊柱稳定性和防止相邻段变性方面表现出色.
科学领域:
- 生物机械工程 生物机械工程
- 脊柱外科手术 脊柱外科手术
- 有限元分析 有限元分析
背景情况:
- 斜腰椎间体融合 (OLIF) 是一种用于治疗各种脊柱病理的手术技术.
- 不同的内部固定方法可以影响OLIF的生物力学结果.
研究的目的:
- 开发腰椎 (L3-S1) 的一个3D有限元模型.
- 在OLIF程序中评估四种不同的内部固定技术 (独立,单边皮质骨轨迹螺丝,双边皮质骨轨迹螺丝和双边脚螺丝) 的生物力学影响.
主要方法:
- 创建了一个L3-S1腰椎的验证的3D有限元模型.
- 在L4-L5段模拟了四种OLIF手术配置:独立 (SA),单边皮质骨轨迹螺丝 (UCBT),双边皮质骨轨迹螺丝 (BCBT) 和双边脚螺丝 (BPS).
- 模型接受纯时刻 (10N·m) 模拟各种脊柱运动,以计算运动范围 (ROM),子应力和固定应力.
主要成果:
- 双边皮质骨轨迹螺丝 (BCBT) 组表现出最有限的运动范围,表明卓越的稳定性.
- 独立 (SA) 组显示出最高的运动范围和子压力.
- 双边脚螺丝 (BPS) 组表现出最低的子和内部固定应力.
- 与其他固定方法相比,单侧皮质骨轨迹螺丝 (UCBT) 组通常显示出更高的内部固定应力,除了右曲和右旋转.
结论:
- 具有内部固定的OLIF增强了细分稳定性,并减少了子应力.
- 双边脚螺丝 (BPS) 固定在防止端板损坏和减少子沉降风险方面是有利的.
- 双边皮质骨轨迹螺丝 (BCBT) 固定在维持手术片段稳定性,优化应力分布和潜在地减少相邻片段退化 (ASD) 中提供了显著的好处.
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