Smale Kenneth B, Potvin Brigitte M, Shourijeh Mohammad S, Benoit Daniel L
School of Human Kinetics, University of Ottawa, Canada.
Department of Engineering, University of Ottawa, Canada.
J Biomech. 2017 Sep 6;62:132-139. doi: 10.1016/j.jbiomech.2017.06.049. Epub 2017 Jul 8.
The recent development of a soft tissue artifact (STA) suppression method allows us to re-evaluate the tibiofemoral kinematics currently linked to non-contact knee injuries. The purpose of this study was therefore to evaluate knee joint kinematics and kinetics in six degrees of freedom (DoF) during the loading phases of a jump lunge and side cut using this in silico method. Thirty-five healthy adults completed these movements and their surface marker trajectories were then scaled and processed with OpenSim's inverse kinematics (IK) and inverse dynamics tools. Knee flexion angle-dependent kinematic constraints defined based on previous bone pin (BP) marker trajectories were then applied to the OpenSim model during IK and these constrained results were then processed with the standard inverse dynamics tool. Significant differences for all hip, knee, and ankle DoF were observed after STA suppression for both the jump lunge and side cut. Using clinically relevant effect size estimates, we conclude that STA contamination had led to misclassifications in hip transverse plane angles, knee frontal and transverse plane angles, medial/lateral and distractive/compressive knee translations, and knee frontal plane moments between the NoBP and the BP IK solutions. Our results have substantial clinical implications since past research has used joint kinematics and kinetics contaminated by STA to identify risk factors for musculoskeletal injuries.
软组织伪影（STA）抑制方法的最新进展使我们能够重新评估目前与非接触性膝关节损伤相关的胫股关节运动学。因此，本研究的目的是使用这种计算机模拟方法评估跳步弓步和侧切加载阶段膝关节在六个自由度（DoF）下的运动学和动力学。35名健康成年人完成了这些动作，然后使用OpenSim的逆运动学（IK）和逆动力学工具对他们的表面标记轨迹进行缩放和处理。然后，在IK过程中，将基于先前骨针（BP）标记轨迹定义的膝关节屈曲角度相关运动学约束应用于OpenSim模型，并使用标准逆动力学工具处理这些约束结果。在对跳步弓步和侧切进行STA抑制后，观察到所有髋关节、膝关节和踝关节自由度均存在显著差异。使用临床相关效应量估计，我们得出结论，STA污染导致了在无BP和BP IK解之间，髋关节横断面角度、膝关节额面和横断面角度、膝关节内外侧和牵张/压缩平移以及膝关节额面力矩的错误分类。我们 的结果具有重大临床意义，因为过去的研究使用了受STA污染的关节运动学和动力学来识别肌肉骨骼损伤的风险因素。
