The kinematics of fixed- and mobile-bearing total knee arthroplasty
The kinematics of fixed- and mobile-bearing total knee arthroplasty
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DOI：
10.1097/01.blo.0000092999.90435.d1
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发表时间：
2003-11-01
影响因子：
4.2
通讯作者：
Rubash, HE
中科院分区：
文献类型：
--
作者：
Most, E;Li, G;Rubash, HE
任何全膝关节置换术 (TKA) 的成功都受到组件几何形状与周围软组织之间复杂相互作用的影响。本研究的目的是研究单一设计的后稳定 TKA 中的后股骨平移和腓骨旋转，提供固定和移动轴承胫骨组件。具体来说，我们检查了移动轴承 TKA 是否比固定轴承 TKA 设计能更好地恢复正常的膝关节平移和旋转。使用机器人系统对尸检后取出的十一个人类膝盖标本进行了测试。比较完整膝关节和重建膝关节的平移和旋转。数据表明，对于所有膝盖，股骨后侧平移沿着被动路径并且在肌肉负荷条件下发生。此外，屈曲角度的增加与胫骨内旋转的增加相对应。尽管组件设计存在差异，但固定轴承和移动轴承后稳定全膝关节置换术的股骨平移和胫骨旋转相似。然而，两种关节置换术仅部分恢复了完整的膝关节平移和旋转。这里提供的数据可以帮助进一步改进手术技术和假体设计，从而恢复正常的膝关节功能。
The success of any total knee arthroplasty (TKA) is influenced by a complex interaction between component geometry and the surrounding soft tissues. The objective of this study was to investigate posterior femoral translation and fibial rotation in a single design posterior-stabitized TKA offering fixed-and mobile-bearing tibial components. Specifically, we examined whether mobile-bearing TKA restores normal knee translation and rotation better than fixed-bearing TKA design. Eleven human knee specimens retrieved postmortem were tested using a robotic system. The translation and rotation of the intact and reconstructed knees were compared. The data indicate that for all knees, posterior femoral translation occurs along the passive path and under muscle loading conditions. Furthermore, increasing flexion angle corresponded with increased internal tibial rotation. Femoral translation and tibial rotation for fixed- and mobile-bearing posterior-stabilized TKAs were similar despite component design variations. However, both arthroplasties only partially restored intact knee translation and rotation. The data presented here may serve as an aid in the development of a rationale for additional improvement in surgical techniques and prosthesis design, so that normal knee function may be restored.