多重平面不对齐对假肢机械的综合影响 在膝关节关节整形术后的步态负荷下-有限元分析
Yichao Luan1,2, Min Zhang1, Xiang Dong2,3
1School of Biological Science and Medical Engineering, Beihang University, Beijing, China.
Orthopaedic surgery
|May 27, 2025
概括
冠状线对整膝关节整形手术 (TKA) 中,冠状线对带外线的应力产生显著影响. 旋转对齐具有适度的影响,而斜腰对齐对行走过程中的组件应力影响最小.
科学领域:
- 骨科生物力学 骨科生物力学
- 有限元素分析的研究.
- 整膝关节整形术 (TKA) 的组成部分对齐.
背景情况:
- 组件对齐对于TKA结果至关重要.
- 之前的研究重点是单平面对齐效应.
- 多平面不对齐对TKA组件的影响不太清楚.
研究的目的:
- 为了研究多平面不对齐对在走路负荷下聚乙烯带内的影响.
- 量化冠状,斜面和横面的对齐错误对组件应力的影响.
主要方法:
- 采用了经过验证的有限元模型,用于支膝关节假肢.
- 模拟了125个横跨冠状,斜面和横面 (-5°至5°) 的对齐组合.
- 通过回归分析,分析了步行周期中的最大·米塞斯和接触应力.
主要成果:
- 冠状元不对齐 (/) 显示出对压力的最显著影响.
- 旋转 (内部/外部) 错位显示出中度影响.
- 斜臂不对齐 (屈曲/延伸) 对带外线应力影响最小.
结论:
- 冠状元对齐是TKA中带外应力的主要驱动因素.
- 旋转对齐是第二个最有影响力的因素.
- Sagittal 对齐在行走过程中对骨外应力产生最小的影响.
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