Knee Cartilage Repair Registry

Inclusion Criteria: Prospective Subjects * Provides written informed consent. * Is eighteen (18) years of age or older at time of consent and considered skeletally mature in the opinion of the investigator. * Scheduled to undergo knee cartilage surgery with the Marketed Product-MP01 OR other knee cartilage repair surgery. * For subjects having other knee cartilage repair surgery: \- Falls within Marketed Product-MP01 on label indication: Knee chondral or osteochondral lesions (ICRS grade III and above, 1-7cm2) in patients with or without mild-moderate knee osteoarthritis (K/L 0-3). * Has an electronic device and is willing and able to use the device to complete the 'Electronic Clinical Outcomes Assessment' (eCOA). * Willing and able to complete all requested questionnaires. * Able to follow instructions and deemed capable of completing registry protocol requirements. Retrospective/Prospective Subjects * Provides written informed consent. * Was eighteen (18) years of age or older at time of surgery and considered skeletally mature at that time in the opinion of the investigator. * Underwent knee cartilage repair surgery with the Marketed Product-MP01 within the last 2-years. * Has an electronic device and is willing and able to use the device to complete the eCOA. * Willing and able to complete all requested questionnaires. * Able to follow instructions and deemed capable of completing registry protocol requirements. * Consents to retrospective data being collected from pre-operative visit(s) and surgery through to the point of consent as available in their medical notes. Exclusion Criteria: * History of allergic reaction or intolerance of materials containing calcium carbonate or hyaluronate/coral derivatives. * Is actively participating in a cartilage repair clinical trial. * For subjects having other knee cartilage repair surgery: \- Treatment will be on patellar lesion(s). * Has participated previously in this registry (with the index or contralateral knee). * Meets the definition of a Vulnerable Subject per ISO 14155 Section 3.56.