弗兰克·斯廷奇菲尔德奖:常用的双移动性植入物之间的组装和解离力不同:生物机械研究
Katherine E Mallett1, Sergio F Guarin Perez1, Alexander W Hooke1
1Mayo Clinic Department of Orthopedic Surgery, Rochester, Minnesota.
The Journal of arthroplasty
|March 13, 2024
概括
双流动性 (DM) 植入物头显示不同的组装和解离力. 维生素E可能会增加这些力量,并且在解离后不应重新植入DM头,以防止假肢内解离 (IPD).
科学领域:
- 整形外科手术 整形外科手术
- 生物医学工程 生物医学工程
- 材料科学是一种材料科学.
背景情况:
- 假肢内解离 (IPD) 是双移动性 (DM) 植入物中独特的并发症,涉及将外部聚乙烯头与内部大腿骨头分开.
- 在DM脱位的闭合减少过程中,越来越多的IPD报告需要对DM头组装和解离力进行生物力学评估.
研究的目的:
- 从生物力学上评估来自不同供应商的双流动性 (DM) 植入物头的组装和解离力.
- 为了比较高交联聚乙烯 (HXLPE) 和注入维生素E的聚乙烯DM头的性能.
主要方法:
- 测试了来自5家供应商的17个聚乙烯DM头 (12个HXLPE,5个注入维生素E),直径为46-47毫米,可以接受28毫米内部陶头.
- 使用伺服液压机器在组装和拆卸过程中记录力和扭矩.
- 通过轴向拔出和杆拔出技术模拟解离,杆拔出模仿茎对骨部件的冲击.
主要成果:
- 在不同供应商之间观察到初始组装力的显著变化 (P < .01),在重复组装后的力量下降.
- 供应商4-E (链接,维生素E) 显示出最高的组装力 (1,831.9 ± 81.95 N) 和解离电阻 (拉出: 2,059.89 N;杆: 38.95 ± 2.79 Nm).
- 与未注入维生素E的对应物 (Vendor 1) 相比,注入维生素E的头部 (Vendor 1-E) 显示出更高的组装力,解离力和能量.
结论:
- 不同制造商的DM植入物头之间在组装和解离力方面存在显著差异.
- 组装所需的力在所有测试的植入物中随着随后的试验而减少.
- 输入维生素E似乎可以增强DM聚乙烯头部的组装和解离力,由于IPD风险,不建议在解离后重新植入.
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