The osteoarthritis (OA) is a chronic and degenerative disease which brings articular cartilage degeneration. As a consequence, balance and proprioception could be dangerously reduced after total knee arthroplasty.

Several studies demonstrated the correlation between OA, proprioception reduction and increased risk of falling. The aim of this study is to evaluate the proprioception improvement in patients with total knee arthroplasty.

Inclusion Criteria are patients with ASA: 1, 2 or 3; patients who have given their informed written consent to participate in the study; patients live in Bologna and neighboring areas.

Exclusion Criteria are patients with previous osteotomy of the lower limbs; patients with post-traumatic arthrosis; patients with severe preoperative valgus deformity (Hip Knee Ankle angle> 10 °); patients with BMI> 40 kg / m2; patients with rheumatoid arthritis; patients with chronic inflammatory joint diseases; patients with walking diseases (amputations, neuro-muscular diseases, polio, hip dysplasias); patients with Severe arthrosis of the ankle (Kellgren-Lawrence> 3); patients with Severe coxarthrosis (Kellgren-Lawrence> 3); patients with severe postural instability; patients with cognitive impairments, patients with concomitant neurological diseases