Comparison Between the Use of the Tensioner and Standard Surgical Technique for Ligament Balancing of Total Knee Prostheses

Inclusion Criteria: * Male and female subjects candidates for primary cemented total knee prosthesis model Attune PS mobile plate DePuy. * Patients who possess all the psychophysical capabilities to be able to undergo the operation and all the check-ups with radiological tests included (e.g. all patients who are not willing to go to the institute for all the scheduled follow-up visits will be excluded) . * Patients who have signed the "informed consent" approved by the Ethics Committee. * Patients who are aged between 50-85. Exclusion Criteria: * Social conditions that prevent participation in the study in all its phases (homeless patients, with restrictions on personal freedom, etc.) * Patients suffering from deep venous insufficiency of the lower extremities or with a personal or family history of deep venous thrombosis or pulmonary embolism * Patients with a history of erysipelas in the lower extremities * Patients suffering from neurological or psycho-cognitive disorders * Patients suffering from post-traumatic arthrosis * Patients who have already undergone prosthetic surgery and/or arthrodesis at the level of a lower limb joint * Patients with axial knee deformities \>15° * Pregnant female patients * Patients with rheumatic diseases