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首页> 外文期刊>Gait & posture >Knee rotation during a weightbearing activity: Influence of turning.
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Knee rotation during a weightbearing activity: Influence of turning.

机译：负重活动中的膝盖旋转：转向的影响。

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Kinematic studies, in which mobile- and fixed-bearing total knee arthroplasty (TKA) were compared, showed controversial results with respect to axial femorotibial rotation. However, all studies focused only on straight ahead tasks, which may underestimate possible differences in freedom of rotation. The purpose of this study was to investigate the influence of turning on normal axial knee rotation. If large differences across tasks were to be found, this would support the use of this task in the evaluation of in-vivo TKA kinematics. In 15 healthy persons, crossover and sidestep turns were added to a standardized chair rise. Three-dimensional knee angles were recorded using an optoelectronic motion analysis system, and a noninvasive epicondylar frame was developed to track the femur. Compared to knee rotation during the straight ahead task, average peak tibial internal rotation increased during a crossover turn (p<0.001), as did peak external tibia rotation during a sidestep turn (p<0.001). The combinedrange of axial rotation for both turning tasks together was 20.9 degrees , versus 13.5 degrees for the straight ahead task (p<0.001). The turning maneuvers in this study induced a large range of axial knee rotation, so they could be important in studies comparing freedom of rotation in mobile- and fixed-bearing TKA.
机译：运动学研究比较了可移动和固定轴承的全膝关节置换术（TKA），显示了关于轴向股骨旋转的争议性结果。但是，所有研究仅集中在直截了当的任务上，这可能低估了轮换自由度的可能差异。本研究的目的是研究转弯对正常膝关节轴向旋转的影响。如果发现任务之间存在较大差异，则将支持在体内TKA运动学评估中使用此任务。在15位健康的人中，交叉和侧弯转弯被添加到标准的椅子上升中。使用光电运动分析系统记录了三维膝关节角度，并开发了一种非侵入性con上epi框架来跟踪股骨。与直行任务期间的膝关节旋转相比，胫骨内旋的平均峰值在跨接转弯时增加（p <0.001），而在跨步转弯时胫骨的外旋转峰值也在增加（p <0.001）。两个转弯任务一起的轴向旋转总范围为20.9度，而直行任务为13.5度（p <0.001）。这项研究中的转弯动作引起了大范围的轴向膝关节旋转，因此它们在比较活动式和固定式TKA中旋转自由度的研究中可能很重要。

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