The Flexion-Extension Axis of the Knee and its Relationship to the Rotational Orientation of the Tibial Plateau
The Flexion-Extension Axis of the Knee and its Relationship to the Rotational Orientation of the Tibial Plateau
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DOI：
10.1016/j.arth.2011.04.026
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发表时间：
2011-09-01
影响因子：
3.5
通讯作者：
Incavo, Steve J.
中科院分区：
文献类型：
--
作者：
Lawrie, Charles M.;Noble, Philip C.;Incavo, Steve J.
我们测量了胫骨部件相对于解剖标志的最佳旋转对线。运动学数据收集的功能演习模拟在20个尸体膝关节安装在关节模拟器。计算膝关节屈曲30度至90度间隔内的下蹲和弓步活动的膝关节运动轴。然后，我们检查了5个不同的解剖轴在预测膝关节运动方向的准确性和可变性。没有一个标志能保证胫骨部件的正确对线，大多数预测因子具有高度可变性（范围，6度-21度）。最准确的指标是胫骨结节的内三分之一（平均误差：下蹲：3.5度外旋;弓步：9.5度），和胫骨截骨表面的内外轴（6.7度和1.1度内旋）。胫骨部件的正确对线最好通过分割这些标志之间的差异来实现，以消除部件过度外旋和过度内旋的放置。
We measured the optimal rotational alignment of the tibial component with respect to anatomic landmarks. Kinematic data were collected from functional maneuvers simulated in 20 cadaveric knees mounted in a joint simulator. The axis of knee motion was calculated for squatting and lunging activities over the interval of 30 degrees to 90 degrees of knee flexion. We then examined the accuracy and variability of 5 different anatomic axes in predicting the direction of knee motion. No one landmark guaranteed correct alignment of the tibial component and most predictors were highly variable (range, 6 degrees-21 degrees). The most accurate indicators were the medial third of the tibial tubercle (average error: squatting: 3.5 degrees external rotation; lunging: 9.5 degrees), and the medial-lateral axis of the resected tibial surface (6.7 and 1.1 degrees internal rotation). The correct alignment of the tibial component can be best achieved by splitting the difference between these landmarks to eliminate placement of the component in excessive external and excessive internal rotation.