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使用有限元素方法对全聚乙烯全膝关节置换器及其金属背对应器在周围假肢的生物机械比较

Vasileios Apostolopoulos¹, Petr Boháč², Petr Marcián²

¹First Department of Orthopaedic Surgery, St. Anne's University Hospital and Faculty of Medicine, Masaryk University, Brno, Czech Republic.

Journal of orthopaedic surgery and research

|February 23, 2024

概括

在全膝关节整形术 (TKA) 中,全聚乙烯腿部 (APT) 组件的生物机械性能与金属支腿部 (MBT) 组件相当或优于,特别是在骨骨. 这表明APT可能是TKA的可行的替代方案.

科学领域:

骨科生物力学骨科生物力学
生物材料工程是生物材料的工程.
骨重塑骨的重塑骨的重塑

背景情况:

膝关节整形术 (TKA) 使用全聚乙烯脚 (APT) 或金属支脚 (MBT) 组件.
虽然MBT更常见,但APT对于老年患者来说是一个具有成本效益的选择,具有可比的生存率和临床结果.
生物力学分析对于比较周围假肢骨对不同TKA部件的反应至关重要.

研究的目的:

为了生物机械地比较周围假肢部对NexGen APT和MBT组件的反应,在骨骨中.
分析骨组织应变分布,并预测潜在的骨重塑.
评估在TKA中增加APT组件利用的潜力.

主要方法:

应用了一种模拟水平行走的标准化负载模型.
计算机断层扫描数据被用来创建患者特定的几何和材料模型.
用于分析,使用了一种代表骨骨的材料模型.

主要成果:

在APT组件下方的取消性骨中相当的菌株在中间超过1000m,而MBT菌株集中在茎尖.
对于APT组件的微链值,超过80%的骨体积在300-1500mE范围内.
对于MBT组件的微链值在骨体积不到64%的范围内在300-1500 με之间.

结论:

与MBT相比,APT植入表现出与MBT相等或更高的生物力学效应在周围假肢上.
应变分布分析表明,使用APT组件进行骨组织重塑的潜力.
临床验证可能会导致修改植入物选择,有利于增加APT组件的使用.

关键词:

完全由聚乙烯构成的部件.计算建模计算建模欧洲经济论坛 (EEA) 是一个国际论坛.有限元素方法有限元素方法.膝关节置换手术膝关节置换手术带有金属支的部部件.这就是TKR的意思.整体膝关节关节整形术膝关节整形术

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