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两个中位稳定全膝关节置换系统的磨损和动力学

Raelene M Cowie¹, Charles J Cullum², Simon N Collins²

¹Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, UK.

|February 23, 2024

概括

这项研究比较了两种中位稳定膝关节置换系统,发现两者都具有固有的稳定性. 医疗稳定全膝关节置换系统显示出低聚乙烯磨损的潜力.

科学领域:

生物医学工程生物医学工程
整形外科手术整形外科手术
材料科学材料科学材料科学

背景情况:

医疗稳定全膝关节置换系统在曲过程中增强稳定性,以获得更自然的感觉.
早期 (中位旋转膝盖TM - MRK) 和现代 (SAIPH®) 中位稳定设计的比较对于理解进步至关重要.

研究的目的:

为了比较MRK和SAIPH®全膝关节置换系统的动力学和聚乙烯磨损.
为了评估两个不同的中位稳定膝关节关节整形设计的稳定性和磨损性能.

主要方法:

使用膝盖模拟器对三个SAIPH®和三个MRK全膝关节置换器进行600万次测试.
评估的超高分子量聚乙烯 (UHMWPE) 部部件在重力学上磨损.
在整个模拟过程中,在ISO 14243-1条件下测量了前后转换和骨旋转.

主要成果:

平均UHMWPE磨损率为SAIPH®的0.57 ± 0.71 mm3/百万循环和MRK的1.24 ± 2.0 mm3/百万循环,没有显著差异 (p=0.24).
与MRK相比,SAIPH®全膝关节置换器表现出更大的前后运动范围.
两种膝关节置换系统都表现出低幅度的骨旋转.

结论:

在这些中间稳定设计中,受约束的中间提供了固有的稳定性,以低前后位移和骨旋转为证据.
在全膝关节整形术中,医疗稳定膝关节系统是实现低聚乙烯表面磨损的有希望的解决方案.

关键词:

生物力学生物力学实验模拟的实验模拟在中位稳定,中位稳定.整体膝关节置换整体膝关节置换这是一种UHMWPE.穿着穿着穿着穿着穿着穿着

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