Kinematic Characteristics of the Knee Joint during Squatting in Patients after TKA Based on Motion Capture
DOI:
https://doi.org/10.71222/24x0pw87Keywords:
total knee arthroplasty, squat kinematics, motion capture, joint kinematics, biomechanics, rehabilitationAbstract
This study comprehensively investigated the limitation of high-flexion knee function in patients following total knee arthroplasty (TKA), a critical factor affecting postoperative quality of life. By comparatively analyzing the squat kinematics of postoperative patients and healthy individuals, the research aimed to enrich the existing knee kinematics database. Furthermore, it sought to provide robust data support and theoretical guidance for optimizing postoperative rehabilitation strategies and designing advanced artificial prostheses. The Optotrak Certus motion capture system was utilized to precisely collect three-dimensional coordinate data of body-surface markers during deep squatting exercises in a cohort comprising 15 patients after TKA and 20 healthy control subjects. Subsequently, MATLAB-based data processing techniques were employed to accurately calculate the six-degree-of-freedom kinematic parameters of the femur relative to the tibia. The three-dimensional kinematic differences of the tibiofemoral joint during the squatting motion between the TKA patients and the healthy individuals were systematically compared and analyzed to identify specific biomechanical deficits. Ultimately, this study successfully verified the feasibility and accuracy of integrating motion-capture technology with custom MATLAB algorithms in complex knee kinematic analysis. The findings clearly revealed the persistent functional limitations and altered biomechanics of the knee joint during squatting after TKA. These insights provide a crucial experimental basis for optimizing targeted postoperative rehabilitation training strategies and significantly improving the high-flexion stability design of future artificial knee prostheses.References
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