Kinematic characteristics of the tibiofemoral joint during a step-up activity.
Kinematic characteristics of the tibiofemoral joint during a step-up activity.
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DOI：
10.1016/j.gaitpost.2013.03.004
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发表时间：
2013-09
期刊：
影响因子：
2.4
通讯作者：
Li, Guoan
中科院分区：
文献类型：
--
作者：
Li, Jing-Sheng;Hosseini, Ali;Cancre, Lucile;Ryan, Nolan;Rubash, Harry E.;Li, Guoan
上楼梯是膝盖的一项重要日常功能。本研究旨在研究胫骨和股骨软骨表面上的关节软骨接触运动学，并使用跨上髁轴 (TEA) 和几何中心轴 (GCA) 描述踏步活动期间股骨髁的运动。纳入 21 名健康受试者，并使用 MR 图像重建他们的膝关节模型。使用双荧光镜成像系统对单楼梯爬升活动进行成像。确定三维膝关节接触点并将其投影到胫骨平台和股骨髁表面。随着膝关节伸展，内侧和外侧胫骨平台上的接触点向前移动（分别为 13.5 ± 3.2 和 10.7 ± 5.0 mm，p>0.05）。股骨内侧髁和外侧髁上的接触点从后部移动到前部（分别为 32.2 ± 4.9 mm 和 25.5 ± 4.2 mm，p<0.05），并且在整个活动过程中位于股骨软骨的内半部。使用 TEA 和 GCA 描述的关节接触运动学和股骨髁运动数据表明，在升步活动期间，内侧和外侧间室具有相似的运动模式。在上步活动期间，膝盖没有表现出内侧旋转运动特征。这些数据可以为当代全膝关节置换术的发展提供见解。
The step-up activity (stair-ascending) is an important daily function of the knee. This study aimed to investigate the articular cartilage contact kinematics on both tibial and femoral cartilage surfaces and describe the femoral condylar motion using the transepicondylar axis (TEA) and the geometric center axis (GCA) during a step-up activity. Twenty-one healthy subjects were included and their knee joint models were reconstructed using MR images. A single-stair step-up activity was imaged using a dual-fluoroscopic imaging system. Three-dimensional knee joint contact points were determined and projected onto the tibial plateau and femoral condyle surfaces. The contact points on the medial and lateral tibial plateau moved anteriorly (by 13.5 ± 3.2 and 10.7 ± 5.0 mm, respectively, p>0.05) with knee extension. The contact points on the medial and lateral femoral condyle moved from the posterior to the anterior portion (by 32.2 ± 4.9 mm and 25.5 ± 4.2 mm, respectively, p<0.05) and were located on the inner half of the femoral cartilage throughout the activity. The data on articular contact kinematics and the femoral condylar motion described using the TEA and GCA indicated that the medial and lateral compartments had similar motion patterns during the step-up activity. The knee does not demonstrate a medial-pivoting motion character during the step-up activity. The data may provide insight to contemporary TKA development.
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