部部件设计特征的影响和干扰适合在植入物-骨微运动在全脚置换:一个有限元素研究研究
Gabriel Clarke1,2, Joshua E Johnson1, Cesar de Cesar Netto3
1Department of Orthopedics and Rehabilitation, The University of Iowa, Iowa City, IA, USA.
Foot & ankle international
|October 6, 2024
概括
在非水泥整体脚置换 (TAR) 中实现初始稳定性对于植入物生存至关重要. 这项研究表明,侧墙和干扰适合显著减少植入物骨微运动,确保更好的长期结果.
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
- 生物材料科学是生物材料的科学.
背景情况:
- 在非水泥全脚置换 (TAR) 中的植入物存活率取决于最初的稳定性.
- 早期的微运动可以阻碍骨整合,对长期结果产生负面影响.
- 部植入物固定旨在通过骨侧壁保留和干扰适应来抵抗微运动.
研究的目的:
- 为了研究设计特异性因素如何影响植入物骨微运动在全脚置换部件.
- 为了评估干扰的作用,适合与固定特征结合.
主要方法:
- 三种代表性的TAR部植入物设计 (ARC,SPIKES,KEEL) 被虚拟插入到患者特定的远部部模型中.
- 有限元分析 (FEA) 模拟了两个固定配置:带有和没有侧墙/干扰合适.
- 模拟步行姿势阶段的负载配置文件被应用到计算植入物-骨微运动.
主要成果:
- 侧墙和干扰适用于所有设计 (<11微米) 的实质性减少的植入物骨微运动.
- 没有这些特征,微动作在跟撞或脚脱落时最高.
- 在没有侧墙/干扰合适的情况下,微运动与固定特征大小相反相关 (ARC: ~540 μm,KEEL: ~15 μm).
结论:
- 侧墙和干扰适配对于最小化非水泥TAR中的微动作至关重要.
- 虽然设计特征会影响稳定性,但干扰适合会显著减少这种效果.
- 干扰适合在非水泥化TAR的初始稳定性中起着至关重要的作用,可能提高植入物存活率.
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