Although knee orthotics have become the preferred treatment method for rehabilitation and injury prevention, their biomechanical influence has not yet been quantified. A new type of knee joint orthosis (KJO) using a non-linear spring-loaded (NLSL) component was recently introduced to help prevent the growing number of knee injuries and aid during rehabilitation. The purpose of this case study is to quantify the lower extremity biomechanical effects and evaluate functional benefits of a new KJO as a precision treatment option. Kinematic and kinetic data obtained from two dynamic squat trials were recorded using VICON^Ⓡ motion capture system and an AMTI^Ⓡ force plate. This data was then applied to a modified computational musculoskeletal model. Inverse kinematics and dynamics were performed to calculate joint angles and joint moments while a static equilibrium problem was solved at each instant during the squat cycle, with and without the NLSL KJO to find individual muscle forces of the lower extremity. The NLSL KJO was seen to improve the activation in the subject's posterior chain musculature encouraging a more balanced synergy versus the inherent quadriceps dominant strategy during the squat movement, and encourage a more neutral behavior in the upright position by inhibiting movement towards terminal knee extension.

尽管膝关节矫形器已成为康复和预防损伤的首选治疗方法，但其生物力学影响尚未量化。最近推出了一种使用非线性弹簧加载 (NLSL) 组件的新型膝关节矫形器 (KJO)，以帮助防止越来越多的膝关节损伤并在康复过程中提供帮助。本案例研究的目的是量化下肢生物力学效应并评估新 KJO 作为精确治疗选择的功能益处。使用 VICON ^Ⓡ动作捕捉系统和 AMTI ^Ⓡ记录从两次动态深蹲试验中获得的运动学和动力学数据力板。然后将该数据应用于修改后的计算肌肉骨骼模型。执行反向运动学和动力学以计算关节角度和关节力矩，同时在深蹲周期中的每个瞬间解决静态平衡问题，使用和不使用 NLSL KJO 以找到下肢的单个肌肉力。NLSL KJO 被认为可以改善受试者后链肌肉组织的激活，在深蹲运动期间与固有的股四头肌主导策略相比，鼓励更平衡的协同作用，并通过抑制向终末膝伸展的运动来鼓励在直立姿势中更加中性的行为。