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全膝关节置换设计在新型机器人测试方法 in vitro 下具有不同的稳定性.

Sander R Holthof1, Shuntaro Nejima1,2, Mick Rock3

  • 1Department of Mechanical Engineering, Biomechanics Group, Imperial College London, London, UK.

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概括

机器人测试显示,在全膝关节整形 (TKA) 设计之间,前后松的显著差异,但回滚仍然是一致的. 植入物几何学影响TKA后膝盖稳定性,为手术选择提供数据.

关键词:
动力学是动力学.假肢 关节几何学 假肢机器人测试 机器人测试 机器人测试稳定性测试 稳定性测试 稳定性测试整体膝关节关节整形手术

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科学领域:

  • 骨科生物力学 骨科生物力学
  • 生物医学工程 生物医学工程
  • 手术机器人手术机器人手术机器人手术机器人

背景情况:

  • 膝关节整形术 (TKA) 旨在恢复膝关节功能,但植入物设计可以影响术后稳定性和动力学.
  • 在TKA之后的不稳定性是影响患者结果的重大问题.

研究的目的:

  • 用一种新型机器人测试方法量化三种不同的TKA设计对膝盖动力学和稳定性的影响.
  • 为了比较不同TKA植入物几何形状的生物力学性能与本地膝盖以及彼此.

主要方法:

  • 使用机器人执行器,在压力和前后 (AP) 部力下测试了8个新鲜冷的尸体膝盖.
  • 在本地膝盖上进行了测试,并在植入三个TKA设计 (逐渐减少半径,多半径,单半径) 后进行了测试.
  • 用统计参数映射分析了膝盖松和回滚.

主要成果:

  • 与完整的膝盖和其他TKA设计相比,单半径TKA设计表现出明显更大的AP松性.
  • 在完整的膝盖,逐渐减少半径和多半径TKA设计之间没有观察到AP松性的显著差异.
  • 在完整的膝盖和三个TKA设计中,回转百分比没有显著差异.

结论:

  • 在本地和TKA膝盖之间,以及在不同的TKA植入物设计之间,AP松性存在显著差异.
  • 膝盖植入物几何学影响稳定性,对尸体和植入因子的敏感性有所不同.
  • 机器人测试提供了对TKA设计效应的客观数据,可能引导外科医生改善患者的治疗结果.