The Journal of arthroplasty · 2026
The One-Year Postoperative Trajectories of Knee Joint Angle Recovery During Walking After Total Knee Arthroplasty in Women: A Cross-Sectional Study.
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Fan Chun-Hao, Hsu Jui-Hung, Yu Pei-An, Chen Chi-Lung, Wen-Wei Hsu Robert, Hsu Wei-Hsiu
Аннотация
BACKGROUND: Total knee arthroplasty (TKA) effectively alleviates pain in end-stage knee osteoarthritis; however, postoperative functional recovery, particularly gait restoration, remains variable. Although knee range of motion typically recovers early after surgery, its relationship with patient-reported outcomes such as the Knee injury and Osteoarthritis Outcome Score (KOOS) is inconsistent. Understanding how dynamic knee joint kinematics during walking evolve over time and relate to perceived function may provide sensitive recovery indicators.
METHODS: Women who underwent unilateral primary TKA were assessed at three, six, nine, and 12 months postoperatively. A three-dimensional gait analysis was used to quantify knee joint angles during walking, and KOOS subscales were collected concurrently. A one-dimensional statistical parametric mapping was applied to examine temporal changes in knee joint kinematics and their associations with KOOS outcomes.
RESULTS: Knee muscle strength, walking speed, and all KOOS subscales improved progressively over the first postoperative year. Knee joint kinematics of the operated limb stabilized by approximately three months, with minimal subsequent changes. There were no significant inter-limb differences observed, except for greater terminal swing knee flexion in the nonoperated limb at three months. Notably, knee flexion angles of the operated limb during the swing phase (approximately 55.0 to 75.0% of the gait cycle) significantly predicted all KOOS subscales except sports/recreation.
CONCLUSIONS: These findings indicate that dynamic knee joint angles during walking, rather than static range of motion measures, are closely associated with perceived knee function after TKA. Gait-based kinematic assessments may serve as valuable objective markers for monitoring recovery and guiding rehabilitation.
METHODS: Women who underwent unilateral primary TKA were assessed at three, six, nine, and 12 months postoperatively. A three-dimensional gait analysis was used to quantify knee joint angles during walking, and KOOS subscales were collected concurrently. A one-dimensional statistical parametric mapping was applied to examine temporal changes in knee joint kinematics and their associations with KOOS outcomes.
RESULTS: Knee muscle strength, walking speed, and all KOOS subscales improved progressively over the first postoperative year. Knee joint kinematics of the operated limb stabilized by approximately three months, with minimal subsequent changes. There were no significant inter-limb differences observed, except for greater terminal swing knee flexion in the nonoperated limb at three months. Notably, knee flexion angles of the operated limb during the swing phase (approximately 55.0 to 75.0% of the gait cycle) significantly predicted all KOOS subscales except sports/recreation.
CONCLUSIONS: These findings indicate that dynamic knee joint angles during walking, rather than static range of motion measures, are closely associated with perceived knee function after TKA. Gait-based kinematic assessments may serve as valuable objective markers for monitoring recovery and guiding rehabilitation.