MAUDE Adverse Event Report: MEDACTA INTERNATIONAL SA GMK SPHERE TOTAL KNEE SYSTEM; GMK-SPHERE TIBIAL INSERT E-CROSS - FLEX 4L - 11MM

Model Number	02.12.E0411FL
Medical Device Problem Code	Device Appears to Trigger Rejection (1524)
Health Effect - Clinical Codes	Joint Laxity (4526); Medical device site infection (4845)
Date of Event	11/03/2025
Type of Reportable Event	Serious Injury
Event or Problem Description
The patient had knee instability and the cause is unknown.The surgeon also found signs of an infection, so at about 6 months post primary he performed a washout and upsized the poly for increased stability.The surgery was completed successfully.
Additional Manufacturer Narrative
Batch review performed on 13 november 2025: lot 2422807: (b)(4) items manufactured and released on 03-oct-2024.Expiration date: 2029-sept-17.No anomalies found related to the problem.To date, (b)(4) items of the same lot have been sold with no similar reported event during the period of review, considering infection and knee instability.Root cause: infection is a known possible complication of any surgery.Although no root cause can be established, there is no indication that any issue with the device may have caused or contributed to the event, and the document review does not indicate any potential manufacturing related cause.The surgeon revised liner height, which is a common practice to restore the joint stability.There is no indication that any potential issue with the device may have caused or contributed to the event.

• Brand Name: GMK SPHERE TOTAL KNEE SYSTEM
• Common Device Name: GMK-SPHERE TIBIAL INSERT E-CROSS - FLEX 4L - 11MM
• Manufacturer (Section D): MEDACTA INTERNATIONAL SA; strada regina; castel san pietro 6874 ; SZ 6874
• Manufacturer Contact: marco giannessi ; strada regina; castel san pietro 6874 ; SZ 6874
• MDR Report Key: 23615336
• Report Number: 3005180920-2025-01173
• Device Sequence Number: 13004048
• Product Code: JWH
• UDI-Device Identifier: 07630971261792
• UDI-Public: 07630971261792
• Combination Product (Y/N): N
• PMA/510(K) Number: K202022
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2025
• Device Explanted Year: 2025
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Company Representative
• Initial Reporter Occupation: Other
• Type of Report: Initial
• Report Date (Section B): 11/21/2025

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: No
• Operator of Device: Health Professional
• Device Model Number: 02.12.E0411FL
• Device Lot Number: 2422807
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 11/03/2025
• Initial Report FDA Received Date: 11/21/2025
• Was Device Evaluated by Manufacturer? (Y/N): Device Not Returned to Manufacturer
• Date Device Manufactured: 10/03/2024
• Is the Device Labeled for Single Use? (Y/N): Yes
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Initial
• Patient Sequence Number: 1
• Outcome Attributed to Adverse Event: Required Intervention
• Patient Sex: Female
• Patient Race: White