Benoit Daniel L, Ramsey Dan K, Lamontagne Mario, Xu Lanyi, Wretenberg Per, Renström Per
Institution for Surgical Sciences, Section of Sports Medicine, Karolinska Institute, Stockholm,
Gait Posture. 2006 Oct;24(2):152-64. doi: 10.1016/j.gaitpost.2005.04.012. Epub 2005 Nov 2.
Eight healthy male subjects had intra-cortical bone-pins inserted into the proximal tibia and distal femur. Three reflective markers were attached to each bone-pin and four reflective markers were mounted on the skin of the tibia and thigh, respectively. Roentgen-stereophotogrammetric analysis (RSA) was used to determine the anatomical reference frame of the tibia and femur. Knee joint motion was recorded during walking and cutting using infrared cameras sampling at 120Hz. The kinematics derived from the bone-pin markers were compared with that of the skin-markers. Average rotational errors of up to 4.4 degrees and 13.1 degrees and translational errors of up to 13.0 and 16.1mm were noted for the walk and cut, respectively. Although skin-marker derived kinematics could provide repeatable results this was not representative of the motion of the underlying bones. A standard error of measurement is proposed for the reporting of 3D knee joint kinematics.
八名健康男性受试者在胫骨近端和股骨远端植入了皮质内骨钉。每个骨钉上附着三个反光标记，胫骨和大腿皮肤上分别安装了四个反光标记。采用X线立体摄影测量分析（RSA）来确定胫骨和股骨的解剖参考坐标系。在步行和切割过程中，使用以120Hz采样的红外摄像机记录膝关节运动。将来自骨钉标记的运动学数据与皮肤标记的运动学数据进行比较。步行和切割时，平均旋转误差分别高达4.4度和13.1度，平移误差分别高达13.0毫米和16.1毫米。虽然源自皮肤标记的运动学数据可以提供可重复的结果，但这并不代表深层骨骼的运动。建议在报告三维膝关节运动学时采用测量标准误差。
