Inclusion Criteria:  Male or female Age ≥ 18 years old Given written informed consent approved by the reference Ethics Committee (EC) Subjects in whom a decision has already been made to perform a revision Total Knee Arthroplasty with Multigen Plus H system as per Indication For Use. The decision to implant the Multigen Plus H system must be taken prior to, and independently from, the decision to enrol the subject. This decision should be made in accordance with routine standard of care at the study site. Subject is able to comply with the protocol  Exclusion Criteria:  Age < 18 years old Subjects with any Multigen Plus system contraindication for use as reported in the current Instruction For Use Any clinically significant pathology based on the medical history that the Investigator feels may affect the study evaluation Female subjects who are pregnant, nursing, or planning a pregnancy