Inclusion Criteria:  Male or female aged 18 - 80 years old at the time of the surgery Implanted (or with an indication) with an HLS KneeTec Cementless or hybrid fixation according to the Instructions for Use (IFU) Patients agree to consent to collect data from their medical records and agree to answer questionnaires for the purposes of the study.  Exclusion Criteria:  - Patients under guardianship and/or those who, according to the investigator or his delegated research team, will not be able to comply with the study procedures. (e.g. illiteracy, recent psychotic or manic disorders and/or inability to comply with routine follow-up visits.)