The study is, in accordance with current legislation, definable as a prospective single-center interventional randomized study. The aim of the study is to evaluate the post-operative recovery of the group A patient undergoing the partial knee replacement surgical procedure compared to the group B patient undergoing the total knee replacement surgical procedure through clinical/functional scores. The primary outcome is evaluate the difference in score of the KSS questionnaire, at 1 month after surgery, completed by the patient of group A compared to the patient of group B. The population consists of 48 adult patients with gonarthrosis divided into two groups: 24 patients Group A experimental group: partial denture surgical procedure 24 patients Group B control group: total denture surgical procedure with patellar resurfacing