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Accuracy of navigated knee stability examination: A cadaveric evaluation

机译：导航膝关节稳定性检查的准确性：尸体评估

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Introduction: Clinical examination, the cornerstone of clinical decision making in knee instability, remains empirical and may be confusing in the setting of multiplanar knee instability. For example, there remains sparse quantitative data concerning aberrant knee kinematics after posterolateral corner injury. In this injury pattern, there is multiplanar instability with an increase in both varus and external rotation. Computerized navigation systems provide the ability to quantify multiplanar knee translations and rotations during knee stability examination. The purpose of this study was to assess the accuracy of a navigated knee stability examination and quantify coupled motions in cadaveric knees subjected to varus loading with and without external rotation loading in intact and posterolateral corner deficient knees. Methods: 6 cadaveric knees were mounted on a 6 Degree-of-Freedom (DOF) robotic manipulator/positional sensor. The knees were taken through a full range of motion and then subjected to 9Nm of varus stress at 0? 30?and 60? The procedure was then repeated with the 9Nm varus stress and 4Nm external rotation force at the same flexion angles. This protocol was used in both intact knees and the same knees after sectioning of the posterolateral corner (lateral collateral ligament (LCL), popliteal-fibular ligament (PFL), and popliteus).
机译：介绍：临床检查，临床决策中的基石在膝关节不稳定，仍然是经验的，可能会令人困惑的是，多平坦的膝关节不稳定。例如，在隔膜损伤后仍然存在关于异常膝关节运动学的稀疏定量数据。在这种伤害模式中，具有多平方的不稳定性，随着VARUS和外部旋转的增加。计算机化导航系统提供在膝关节稳定性检查期间量化多平面膝关型和旋转的能力。本研究的目的是评估导航的膝关节稳定性检查的准确性，并定量尸体膝盖中，尸体膝盖中的尸体膝关节与完整和后侧角缺乏外部旋转载荷的外旋载荷。方法：在6自由度（DOF）机器人机械手/位置传感器上安装6个尸体膝盖。膝盖通过全方位的运动进行，然后在0℃下进行9nm的杂色胁迫？ 30？和60？然后以相同的屈曲角度用9nm varus应力和4nm外部旋转力重复该过程。在切割后外侧角（侧面侧缘韧带（LCl），Popliteal-Fibular韧带（PFL）和Popliteus）后，该方案用于完整膝盖和相同的膝关节。

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