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肌肉引对逆关节假肢的主要稳定性的影响
Anna Rifer1, Dirk Stolz1,2, Carlos A Fonseca Ulloa1
1Laboratory of Biomechanics, Justus-Liebig-University Giessen, Klinikstrasse 29, 35392, Giessen, Germany.
Journal of orthopaedics
|June 19, 2023
概括
在较大的骨模型中,肌肉引不会显著影响逆关节假肢的初级稳定性. 扭转时刻的增加与更大的微运动相关,特别是在较大的骨缺陷中.
科学领域:
- 整形外科手术 整形外科手术
- 生物机械工程 生物机械工程
- 植入物稳定性分析
背景情况:
- 部假肢的术后稳定性对于患者的治疗结果至关重要.
- 肌肉引对假肢稳定性的影响需要进一步研究.
- 了解不同骨缺陷大小的稳定性对于植入物设计至关重要.
研究的目的:
- 在肌肉引下分析逆部假肢的体外稳定性.
- 为了评估不同骨缺陷大小对假肢微运动的影响.
- 为了确定扭转时刻,肌肉负荷和植入物稳定性之间的关系.
主要方法:
- 在200mm和160mm长度的骨模型中植入反向部假肢 (AEQUALISTM ADJUSTABLE REVERSED).
- 循环扭矩 (2Nm - 6Nm) 和轴负荷模拟肌肉引 (7.7kg至69.3kg).
- 使用不同高度的高灵敏度位移传感器测量相对假肢微运动.
主要成果:
- 较大的扭转时刻显著增加了相对微运动,特别是在较大的骨缺陷中 (P < 0.014).
- 在较大的骨模型中,肌肉引没有显著影响微运动 (P = 1.000).
- 较小的骨模型在肌肉引效应上没有显著差异,直至6Nm (P<0.028).
结论:
- 扭矩的增加与较高的相对微运动直接相关.
- 在200毫米骨模型中,肌肉引不会影响反向假肢的初级稳定性.
- 骨缺陷大小是影响假肢在扭力负荷下微运动的关键因素.
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