Lateral Wedge Insoles With Arch Support in Knee Osteoarthritis

Inclusion Criteria: * Symptomatic medial knee osteoarthritis (OA ; Kellgren-Lawrence grade I, II or III) according to clinical and radiological criteria of the American College of Rheumatology * Knee pain \> 31/100 (Western Ontario and McMaster Universities Arthritis Index - WOMAC) * Moderately active * Varus knee alignment equal or superior to 2° Exclusion Criteria: * Severe knee OA (K-L grade IV) * Rheumatoid arthritis or other inflammatory arthritis * Avascular necrosis * History of periarticular fracture or septic arthritis * Bone metabolic disease * Pigmented villonodular synovitis * Cartilaginous disease * Neuropathic arthropathy * Synovial osteochondromatosis * Total or partial knee arthroplasty * Flexion contracture of ipsi- or contra-lateral knee greater than 15° * Hip or ankle joint damage with mobility limitation * Obesity (BMI ≥ 40) * Intra-articular corticosteroids injection in the affected knee during the two previous months * Reduced mobility (Charnley class C)