Publications by authors named "Tatsunori Maeda"
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.
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- - The study investigates how patello-femoral (PF) overstuffing impacts outcomes after bicompartmental knee arthroplasty (BiKA), a procedure that preserves ligaments and is more susceptible to this issue compared to total knee arthroplasty.
- - Researchers followed 71 patients for 5 to 9 years, assessing knee performance and using imaging to evaluate PF overstuffing, finding that higher overstuffing correlated with worse clinical scores two years post-surgery.
- - While BiKA resulted in overall patient satisfaction and functional improvement, the study concludes that careful osteotomy planning is essential to minimize PF overstuffing and enhance initial outcomes.
Background: High tibial osteotomy (HTO) reduces the load distribution of the medial compartment by modifying leg alignment. Knee adduction moment (KAM), a surrogate measure of dynamic loading in the knee joint, decreases after HTO. However, leg alignment does not fully account for KAM.
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- The study investigates the movement patterns of knees after medial pivot type total knee arthroplasty (MP TKA) during walking, focusing on kinematics and center of axial rotation.
- It involved 40 patients (20 with cruciate-substituting TKA and 20 with posterior-stabilized TKA) and 10 healthy controls, using a 3D motion analysis system for data collection.
- Results showed reduced knee flexion changes in the TKA groups compared to controls, with a predominantly lateral center of rotation observed during walking, indicating a complex movement pattern that doesn't exclusively rely on the expected medial pivot mechanism.
[Purpose] The purpose of this study was to determine the normal range of the side-to-side difference in three dimensional knee kinematics measured by the point cluster technique (PCT). [Subjects] The subjects were twenty-one healthy normal volunteers without knee pain or an episode of injury to the legs. [Methods] The subjects were tested bilaterally at a self-selected normal walking speed and six degrees of freedom knee kinematics were measured using the PCT, and the 95% confidence intervals of the average side-to-side differences in flexion-extension (FE), adduction-abduction (AA), internal-external (IE) rotation, and anterior-posterior (AP), medial-lateral (ML), superior-inferior (SI) translation in each stage of the gait cycle were determined.
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