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首页> 外文期刊>Journal of orthopaedic research >Evidence for differential control of tibial position in perturbed unilateral stance after acute ACL rupture.
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Evidence for differential control of tibial position in perturbed unilateral stance after acute ACL rupture.

机译：急性ACL破裂后单侧姿势受干扰的胫骨位置差异控制的证据。

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Functional outcomes in anterior cruciate ligament-deficient "potential copers" and "non-copers" may be related to their knee stabilization strategies. Therefore, the purpose of this study was to differentiate dynamic knee stabilization strategies of potential copers and non-copers through analysis of sagittal plane knee angle and tibia position during disturbed and undisturbed unilateral standing. Ten uninjured potential coper and non-coper subjects stood in unilateral stance on a platform that translated anteriorly, posteriorly and laterally. Knee angle and tibia position with reference to the femur were calculated before and after platform movement. During perturbation trials, potential copers maintained kinematics that were similar to uninjured subjects across conditions. Conversely, non-copers stood with greater knee flexion than uninjured subjects and a tibia position that was more posterior than the other groups. Both non-copers and potential copers demonstrated small changes in tibia position following platform movement, but direction of movement was not similar. The similarities between the knee kinematics of potential copers and uninjured subjects suggest that potential copers compensated well from their injury by utilizing analogous dynamic knee stabilization strategies. In comparison to the other groups, by keeping the knee in greater flexion and the tibia in a more posterior position, non-copers appear to constrain the tibia in response to a challenging task, which is consistent with a "stiffening strategy". Based on the poor functional outcomes of non-copers, a stiffening strategy does not lead to dynamic knee stability, and the strategy may increase compressive forces which could contribute to or exacerbate articular cartilage degeneration.
机译：前交叉韧带不足的“潜在潜手”和“非潜手”的功能结局可能与其膝关节稳定策略有关。因此，本研究的目的是通过分析矢状面膝关节角度和胫骨位置在单向站立和不受干扰时的动态膝关节稳定策略，以分析潜在的男性和非男性。十名未受伤的潜在铜和非铜受试者以单侧姿态站立在向前，向后和向侧平移的平台上。在平台运动之前和之后，计算相对于股骨的膝盖角度和胫骨位置。在摄动试验期间，潜在的警惕者保持的运动学与各种情况下未受伤的受试者相似。相反地​​，没有脚掌的人比没有受伤的人更容易屈膝，胫骨的位置比其他组更靠后。非平台和潜在平台都显示出平台运动后胫骨位置的微小变化，但运动方向并不相似。潜在铜pers和未受伤受试者的膝关节运动学之间的相似性表明，潜在铜by通过使用类似的动态膝盖稳定策略可以很好地补偿其受伤。与其他组相比，通过使膝盖保持更大的屈曲度和使胫骨保持在更后部的位置，无脚者似乎在应对具有挑战性的任务时会约束胫骨，这与“加强策略”相一致。基于非铜器功能不良的结果，僵硬的策略不会导致动态膝关节稳定性，并且该策略可能会增加压缩力，从而可能导致或加剧关节软骨退变。

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