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Assessing knee joint biomechanics and trunk posture according to medial osteoarthritis severity
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Assessing knee joint biomechanics and trunk posture according to medial osteoarthritis severity
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Journal Article
Assessing knee joint biomechanics and trunk posture according to medial osteoarthritis severity
2023
Overview
During progression of knee osteoarthritis (OA), gait biomechanics changes three-dimensionally; however, its characteristics and trunk posture according to OA severity remain unknown. The present study investigated three-dimensional knee joint biomechanics and trunk posture according to knee OA severity. Overall, 75 patients (93 knees) with medial knee OA [Kellgren-Lawrence grade ≥ 2, grade 2: 20 patients with 24 knees (mean 60.0 years old); grade 3: 25 with 28 knees (mean 62.0 years old); grade 4: 30 with 41 knees (mean 67.9 years old)] and 14 healthy controls (23 knees, mean 63.6 years old) underwent gait analysis using an optical motion capture system and point cluster technique. In grade 2 knee OA, the relative contribution of the knee adduction moment (KAM) increased significantly (
P
< 0.05), and that of the knee flexion moment decreased (
P
< 0.05) prior to significant progression of varus knee deformity. Grade 3 knee OA showed significant exacerbation of varus knee deformity (
P
< 0.01) and KAM increase (
P
< 0.001). The maximum knee extension angle decreased (
P
< 0.05) and trunk flexion increased during gait in grade 4 knee OA (
P
< 0.001). Our study clarified the kinematics and kinetics of medial knee OA with trunk flexion according to severity. Kinetic conversion occurred in grade 2 knees prior to progression of varus deformities, knee flexion contractures, and sagittal imbalance during gait in patients with severe knee OA.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
