脚螺丝固定对椎脊柱的影响:一个比较的有限元素分析
Subhasish Halder1, Anindya Malas1, Jayanta Kumar Biswas2
1Department of Mechanical Engineering, NIT Patna, Patna, Bihar, India.
The International journal of artificial organs
|February 24, 2026
概括
脚螺杆固定 (PSF) 显著减少椎脊柱的运动范围,双层固定提供了比单层固定更大的稳定性. 这种生物机械分析证实了PSF.
科学领域:
- 生物力学 生物力学
- 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:
- 脚螺杆固定 (PSF) 是用于椎脊柱稳定的一种常见的手术技术.
- 聚烯纤维对椎脊柱稳定性的生物力学影响需要进一步研究.
研究的目的:
- 通过有限元分析 (FEA) 研究PSF对椎脊柱稳定性的影响.
- 在不同负载条件下比较单层和双层PSF的生物机械效应.
主要方法:
- 一个3D有限元素模型的椎脊柱 (C2-C7) 已开发和验证.
- 该模型经历了模拟的曲,延伸,侧向曲和轴向旋转.
- 分析了四种情景:完整的脊椎,单级PSF (C4-C5或C5-C6) 和两级PSF (C4-C6).
主要成果:
- 单层PSF减少了总运动范围 (ROM) 的8.5%-12.4%,而双层PSF则减少了ROM的23.3%-25.3%.
- 脚螺丝 (Ti-6Al-4V) 的最大应力在70-75MPa之间,PEEK杆的最大应力在32-40MPa之间.
- 螺丝和杆材料的应力仍然低于它们各自的度强度.
结论:
- 宫PSF有效地提高了脊柱的稳定性.
- 与单级PSF相比,双级PSF在恢复椎脊柱功能方面表现出更高的生物力学效率.
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