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RESTORIS™ Multicompartmental Knee (MCK) System is indicated for single or multi-compartmental knee replacement used in conjunction with RO®, the Robotic Arm Interactive Orthopedic System, in individuals with osteoarthritis or posttraumatic arthritis of the tibiofemoral and/or patellofemoral articular surfaces. The specific knee replacement configurations include:

• · Medial unicondylar
• · Lateral unicondylar
• · Patellofemoral
• · Medial bi-compartmental (medial unicondylar and patellofemoral)

RESTORIS™ Multicompartmental Knee (MCK) System is for single use only and is intended for implantation with bone cement.

The purpose of this Changes Being Effected premarket notification is to add a contraindication for the Restoris Multicompartmental Knee (MCK) System. Additionally, minor modifications are being made to the contraindications for clarity. There is no change to the intended use, indications, design, technological characteristics or operational principles for the devices. The subject implant components are identical to the predicate components. The Restoris MCK system was most recently cleared in K180612, and has also been cleared previously in K172326, K150307, K090763, K082172, K082088, K082081, and K080368.

This FDA 510(k) submission [K220930] for the Restoris Multi-Compartmental Knee System does not contain any information regarding acceptance criteria or a study proving the device meets acceptance criteria.

The document explicitly states:

• "The purpose of this Changes Being Effected premarket notification is to add a contraindication for the Restoris Multicompartmental Knee (MCK) System. Additionally, minor modifications are being made to the contraindications for clarity." (Page 4)
• "There is no change to the intended use, indications, design, technological characteristics or operational principles for the devices." (Page 4)
• "No additional testing was performed as part of this submission, as the only changes being made are to the labeling for the devices. There is no impact to the device design or the physical characteristics of the devices. Testing submitted as part of previously cleared premarket notifications is applicable to this submission." (Page 5)

Therefore, based on the provided text, I cannot fill in the requested information about acceptance criteria and study results because this particular 510(k) submission is for a labeling change and explicitly states that no new testing was performed. The performance data and acceptance criteria would have been part of previous 510(k) submissions (e.g., K180612, K172326, etc.) referenced in this document.

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