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首页> 外文期刊>Gait & posture >Change in the locus of dynamic loading axis on the knee joint after high tibial osteotomy.
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Change in the locus of dynamic loading axis on the knee joint after high tibial osteotomy.

机译：胫骨截骨术后膝关节动态负荷轴的轨迹变化。

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摘要

The purpose of this study was to visualise the locus of the dynamic loading axis on the knee joint, and to evaluate changes in this locus during gait after high tibial osteotomy (HTO) in three patients who underwent HTO for medial compartment osteoarthritis (OA) of a varus knee. The bone structure of the lower limb and the relative position of skin markers were acquired from CT images. Motion capture data was acquired using spherical skin markers. Skeletal model movement during gait was calculated based on the movement of the markers. The locus of the dynamic loading axis on the knee joint was defined as the point on the proximal tibia joint surface that intersected with the loading axis of the lower limb, which passed through the centre of the femoral head and the centroid of multiple points surrounded by the distal tibia joint surface contour. This system was able to visualise the locus of the dynamic loading axis on the knee joint and not only lateral but also anterior-posterior direction movement. After HTO, the locus shifted from a medial and posterior area of the medial joint edge of the knee to a central area of the knee joint surface. This indicates that HTO shifted the dynamic loading axis. Lateral movement of the dynamic loading axis in the early stance phase of gait was reduced within a year after HTO.
机译：这项研究的目的是可视化膝关节动态负荷轴的轨迹，并评估在接受胫骨内侧截骨术（OA）的3例接受高胫骨截骨术（HTO）后步态过程中该轨迹的变化。膝内翻。从CT图像获取下肢的骨结构和皮肤标志物的相对位置。使用球形皮肤标记获取运动捕捉数据。根据标记的运动计算步态期间骨骼模型的运动。膝关节动态载荷轴的轨迹定义为胫骨近端关节表面上与下肢的载荷轴相交的点，该点穿过股骨头的中心并被多个点的质心围绕胫骨远端关节表面轮廓。该系统能够可视化膝关节上动态加载轴的轨迹，并且不仅可以横向观察，还可以观察前后方向的运动。 HTO后，轨迹从膝盖内侧关节边缘的内侧和后部区域转移到膝盖关节表面的中央区域。这表明HTO移动了动态加载轴。 HTO后一年内，步态早期站立阶段动态载荷轴的横向运动减少。

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