ArticleOrthopaedic journal of sports medicine2026
Arthrokinematic Analysis of High-Impact and Large-Rotation Activities at 1 to 2 Years After Anterior Cruciate Ligament Reconstruction and Meniscal Surgery.
Article in Orthopaedic journal of sports medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Anterior cruciate ligament reconstruction (ACLR) is associated with a high incidence of posttraumatic osteoarthritis (PTOA). The incidence is even higher when ACLR is combined with meniscal surgery (ACLR+M). The mechanisms associated with the onset and progression of PTOA after injury and surgery are not fully understood, but altered joint biomechanics shortly after surgery are implicated. Purpose: To compare the side-to-side differences in joint kinematics (ie, osteokinematics) and articular cartilage arthrokinematics at 1 to 2 years after ACLR+M during 3 demanding activities that challenge the knee with high-impact loads, large rotations, and non-sagittal-plane movements. Study Design: Descriptive laboratory study. Methods: A total of 12 participants (8 male and 4 female) who had undergone ACLR+M at 1 to 2 years previously participated. Dynamic activities included single-leg landing, lunging, and pivoting. Tibiofemoral osteokinematic data of both knees were captured using dual fluoroscopy combined with model-based tracking. Osteokinematic analysis was conducted for 6 degrees of freedom kinematics. Cartilage arthrokinematic data, derived from magnetic resonance imaging-based cartilage models, were evaluated for tibiofemoral contact location, contact overlap, contact path, and excursion. Results: Compared with the contralateral knee, the ACLR+M knee underwent less flexion during landing ( Conclusion: ACLR+M was associated with alterations in osteokinematics and arthrokinematics in the surgical knee, suggesting that the surgical knee does not return to normal function during demanding dynamic activities at 1 to 2 years. This study provides novel in vivo evidence of joint abnormalities under functional loading conditions experienced during everyday activities and sports. These findings enhance our understanding of early biomechanical side-to-side deviations that may contribute to PTOA. Clinical Relevance: Identifying abnormal knee joint mechanics at 1 to 2 years after ACLR+M during high-demand tasks emphasizes the need for targeted rehabilitation and monitoring strategies aimed at mitigating altered loading patterns that may accelerate PTOA development.
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