Patellofemoral kinematics during knee flexion-extension: An in vitro study
Patellofemoral kinematics during knee flexion-extension: An in vitro study
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DOI：
10.1002/jor.20268
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发表时间：
2006-12-01
影响因子：
2.8
通讯作者：
Bull, Anthony M. J.
中科院分区：
文献类型：
--
作者：
Amis, Andrew A.;Senavongse, Wongwit;Bull, Anthony M. J.
这项工作的目的是获得正常人体外膝关节的运动学数据。取新鲜冰冻身体膝关节8个。股四头肌的头是分开的，膝盖安装在运动学装置上。股骨轴与电磁发射器对准。股四头肌的内侧肌、斜肌等6头股四头肌，根据生理横截面积和方向，通过缆索加载。在膝盖骨和胫骨上安装了磁性跟踪器。膝关节在伸展肌肉的作用下屈曲-伸展，并测量6个自由度的膝盖骨轨迹。膝关节屈曲时，髌骨屈曲角度为胫股屈角的0.7倍。在屈膝20度时向内侧平移4 mm以接合滑车沟，然后在屈膝90度时向外侧平移7 mm。屈膝90度时，髌骨逐渐向外倾斜7度，内、外旋角度一般小于3度。这被认为是第一组在屈曲和伸展运动中获得的膝盖骨跟踪数据，而膝盖骨是由一整套作用于生理方向的股四头肌张力作用的。这些数据可用于未来研究病理对膝盖骨追踪的影响。(C)2006年骨科研究会。
The purpose of this work was to obtain kinematics data for the normal human patellofemoral joint in vitro. Eight fresh-frozen cadaver knees were used. The heads of the quadriceps were separated, and the knees mounted in a kinematics rig. The femoral axis was aligned with an electromagnetic transmitter. The six heads of the quadriceps, including vasti medialis and lateralis obliquus, were loaded via cables according to their physiological cross-sectional areas and orientations. Magnetic trackers were mounted on the patella and tibia. The knee was flexed-extended against the extending muscle action, and patellar tracking was measured in six degrees of freedom. As the knee flexed, the patella flexed by 0.7 times the tibiofemoral flexion angle. It also translated medially 4 mm to engage the trochlear groove at 20 degrees knee flexion, then translated to 7 mm lateral by 90 degrees knee flexion. The patella tilted progressively to 7 degrees lateral by 90 degrees knee flexion, and patellar medial-lateral rotation was usually less than 3 degrees. This is believed to be the first set of patellar tracking data obtained in both flexion and extension motion while the patella was acted on by a full set of quadriceps muscle tensions acting in physiological directions. These data may be used in future studies of the effects of pathologies on patellar tracking. (c) 2006 Orthopaedic Research Society.