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定制动态整形器对关节反应力和接触应力的影响:一项尸体研究

Lucinda Williamson¹, Marc Brouillette², Tristan Miller¹

¹Department of Orthopedics and Rehabilitation, University of Iowa, 200 Newton Road, Iowa City, IA 52242, United States; Department of Biomedical Engineering, University of Iowa, 200 Newton Road, Iowa City, IA 52242, United States.

Journal of biomechanics

|November 28, 2024

概括

定制动态骨架 (CDO) 可以减少关节反应力和骨骨架骨折后的接触压力,可能降低创伤后关节炎 (PTOA) 的风险.

科学领域:

整形外科整形外科整形外科
生物力学生物力学
生物医学工程生物医学工程

背景情况:

创伤后关节炎 (PTOA) 是骨骨架骨折后的一个常见并发症.
高度的关节接触应力,通常是由于缩,是PTOA的关键驱动因素.
手术后用定制动态骨架 (CDO) 进行支架可能会降低关节力.

研究的目的:

量化CDO刚度对脚关节反应力 (JRF) 和模拟步行过程中的接触应力的影响.

主要方法:

一个尸体脚模型承受了轴承负荷和阿基里斯肌的激活,以模拟步行姿势.
测试了三种CDO硬度条件:没有支架,低硬度 (1.8Nm/deg) 和中度硬度 (2.3Nm/deg).
压力感应器测量了JRF和接触应力;脚部压力传感器跟踪了压力中心 (COP).

主要成果:

低硬度和中度硬度CDO都显著降低了JRF,分别降低了32%和26%.
随着CDO使用,观察到关节接触应激的相关下降.
脚部COP进展模仿了在测试条件下的正常步态.

结论:

在模拟的柱后骨折脚中,CDO硬度影响JRF和接触应激减轻.
术后用CDO进行支架可能是减轻PTOA风险的可行策略.

关键词:

脚关节接触力学脚关节接触力学脚关节的反应力是什么?脚和脚的整形器具.骨关节炎是一种骨关节炎.

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