The goal of this study is to analyse the localization of allodynic or hypoasthetic territories that may appear after TKA. The investigators will include 200 patients undergoing TKA surgery at the CHU-Amiens-Picardie. Patient will be seen the day before their surgery, and at follow-up visits at 6 weeks, 6 months and one year postoperatively. A DN diagnostic test (DN4 test) will be performed at each visits. The cartography will be performed on each DN4-positive patients. In addition, patients will also complete questionnaires to assess the intensity of pain, quality of life and level of anxiety.