Evaluation of a New Navigation System in Computer-assisted Total Knee Arthroplasty

Inclusion Criteria: * Adult man or woman who has signed the informed consent for participation in the study, * Patient with primary uni or bilateral gonarthrosis * For whom an indication for total knee arthroplasty has been given Exclusion Criteria: * History of fracture, arthroplasty or osteotomy of the knee * Severe preoperative laxity warranting a constrained prosthesis * Inflammatory rheumatic disease or any other progressive concomitant condition that may impact on the patient's functional prognosis * Traumatic articular or extra-articular deformities of the lower limb * Neurological disease, after-effects of a stroke * Mental deficiency or any other reason that may hinder the understanding or the strict application of the protocol * Patient not affiliated to the French social security system * Patient under legal protection, guardianship or curatorship * Patient already included in another therapeutic study protocol or having participated in another trial in the previous three months