Six-Degree-of-Freedom Tibiofemoral and Patellofemoral Joint Motion During Activities of Daily Living
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Annals of Biomedical Engineering ( 2020) https://doi.org/10.1007/s10439-020-02646-2
Original Article
Six-Degree-of-Freedom Tibiofemoral and Patellofemoral Joint Motion During Activities of Daily Living LUCAS THOMEER ,1 SHANYUANYE GUAN ,1 HANS GRAY ,1 ANTHONY SCHACHE ,1 RICHARD DE STEIGER ,2 and MARCUS PANDY
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1
Department of Mechanical Engineering, University of Melbourne, Parkville, VIC 3010, Australia; and 2Department of Surgery, Epworth Health Care, University of Melbourne, Richmond, VIC 3010, Australia (Received 3 March 2020; accepted 30 September 2020) Associate Editor Joel Stitzel oversaw the review of this article.
Abstract—The purpose of this study was to measure the three-dimensional movements of the femur, tibia and patella in healthy young people during activities of daily living. A mobile biplane X-ray imaging system was used to obtain simultaneous measurements of six-degree-of-freedom (6DOF) tibiofemoral and patellofemoral kinematics and femoral condylar motion in ten participants during standing, level walking, downhill walking, stair ascent, stair descent and open-chain (non-weightbearing) knee flexion. Seven of the eleven secondary motions at the knee—three translations at the tibiofemoral joint, three translations at the patellofemoral joint, and patellar flexion—were coupled to the tibiofemoral flexion angle (r2 ‡ 0.71). Tibial internal–external rotation, tibial abduction–adduction, patellar rotation, and patellar tilt were each weakly related to the tibiofemoral flexion angle (r2 £ 0.45). The displacements of the femoral condyles were also coupled to the tibiofemoral flexion angle (r2 ‡ 0.70), with the lateral condyle translating further on the tibial plateau than the medial condyle. The center of rotation of the tibiofemoral joint in the transverse plane was located on the medial side in all activities. These findings expand our understanding of the kinematic function of the healthy knee and may be relevant to a range of applications in biomechanics, including the design of prosthetic knee implants and the development of knee models for use in full-body simulations of movement. Keywords—Knee kinematics, Secondary motions, Coupling, Knee model, Fluoroscopy.
Address correspondence to Marcus Pandy, Department of Mechanical Engineering, University of Melbourne, Parkville, VIC 3010, Australia. Electronic mail: [email protected] Shanyuanye Guan is joint first author.
INTRODUCTION Limited information is available for describing the full three-dimensional motion of the knee-joint complex during activities of daily living. Although many in vitro studies have measured the relative movements of the femur, tibia and patella during passive flexion and under simulated muscle loads,3,15,23,36 few studies have recorded six-degree-of-freedom (6-DOF) kneejoint motion in vivo. Andriacchi et al.1 used skin markers and video motion capture to measure 6-DOF tibiofemoral joint motion for normal walking. To minimize the effects of soft-tissue artefact associated with skin markers, Lafortune et al.,22 Reinschmidt e
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