Performance and Safety Evaluation of the FHK®-CK Knee Prosthesis

Inclusion Criteria: * Patient requiring knee arthroplasty for primary or secondary gonarthrosis: \* For primary intention arthroplasty: Patient with either * major axial deviation, * major peripheral failure or * bone defect; \* For prosthesis revision surgery: Patient who have had a failed 1st implantation, with or without bone defects. * Patient able to understand and answer the questionnaires provided by the protocol; * Subject affiliated to a health insurance system or is a beneficiary; * Signed informed consent form (ICF) for participation to the research. Exclusion Criteria: * Patient with an ongoing acute infection, outside knee to be operated; * Patient with a mental or neuromuscular disorder that would create an unacceptable risk of prosthetic instability, prosthetic fixation failure or post-operative complications; * Patient with a known allergy to any of the components of the FHK®-CK implants (Nickel, Cobalt, Chromium); * Patient with a dependency (drug, alcohol,…) that could affect his/ her ability to comply with the protocol, at the investigator's discretion; * Patient requiring knee reconstruction; * Patient with any medically significant findings or significant history that may impact the safety, interpretation of results, and/ or participation of the subject in the clinical trial, as determined by the investigator; * Patient with an existing knee or hip prosthesis (outside knee to be operated) that may impact the evaluation of the FHK®-CK prosthesis; * Patient concurrently participating in another clinical trial or who has recently participated in another clinical trial for which the exclusion period has not been completed. * Vulnerable subjects : * Pregnant, parturient, or breastfeeding women, * Subject deprived of liberty, hospitalized without consent or admitted to a health or social establishment for purposes other than that of research, * Minor, * Adult under protective supervision (tutorship, curatorship), * Subject not able to understand the subject information leaflet (e.g. for linguistic or psychiatric reasons) and/or to give informed consent