宫椎间盘关节整形不能在侧向偏心负荷下维持生理动力学
Paul Jonathan Roch1, Constantin Hemprich1, Friederike Klockner1
1Department of Trauma Surgery, Orthopaedics and Plastic Surgery, University of Göttingen, Göttingen, Germany.
Global spine journal
|August 17, 2023
概括
宫椎间盘关节置换 (CDA) 改变了脊髓单元的运动. 假肢无法在侧向负载下复制生理即时螺旋轴 (IHA) 行为,这表明需要改进CDA设计和动力学优化.
科学领域:
- 生物力学 生物力学
- 脊柱外科手术 脊柱外科手术
- 整形外科假肢 整形外科假肢
背景情况:
- 宫椎间盘关节置换术 (CDA) 旨在恢复脊柱功能,但可能会改变生物力学.
- 即时螺旋轴 (IHA) 是分析脊柱单位运动学的关键参数.
- 在CDA之后,所有三个运动维度的IHA变化存在有限的研究.
研究的目的:
- 为了研究两种不同的CDA假肢对人类椎脊柱单位即时螺旋轴 (IHA) 的影响.
- 在各种负载条件下分析IHA方向和位置的变化.
- 为了识别可能影响未来假肢设计的动力学变化.
主要方法:
- 在体外对10个人类C4-5功能脊柱单元进行生物机械分析.
- 在完整条件下 (IC) 和CDA后,用两种类型的假肢进行测试.
- 应用轴旋转,横向曲,曲/延伸与异常预负荷.
- 对IHA方向和休息位置的分析 (IHA0).
主要成果:
- 与完整条件相比,CDA改变了IHA动力学,特别是在横向预载荷下.
- 在侧向负载下,IHA0位置和IHA方向的移动和方向在CDA后与IC相比,方向逆转.
- 曲/延伸也显示了CDA后IHA方向的改变.
结论:
- 目前的CDA假肢在横向负荷下不能完全恢复生理IHA特征.
- 研究结果强调需要改进假肢设计,以优化椎脊柱动力学.
- 这项研究为更好的CDA开发提供了对生物力学性能的新见解.
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