MAUDE Adverse Event Report: MEDACTA INTERNATIONAL SA GMK SPHERE TOTAL KNEE SYSTEM; GMK-SPHERE TIBIAL INSERT - FLEX S4L - 12 MM

Model Number	02.12.0412FL
Medical Device Problem Code	Device Appears to Trigger Rejection (1524)
Health Effect - Clinical Code	Medical device site infection (4845)
Date of Event	05/14/2026
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
Batch review performed on 27 may 2026 gmk-sphere 02.12.0412fl gmk-sphere tibial insert - flex s4l - 12 mm (k121416) lot.2118454: (b)(4) items manufactured and released on 03-mar-2022.Expiration date: 2027-feb-15.No anomalies found related to the problem.To date, (b)(4) items of the same lot have been sold without any similar reported event during the period of review.Gmk-hinge 02.09.0417h gmk-hinge tibial insert - size4 - 17 mm (k130299) lot.2337058: (b)(4) items manufactured and released on 06-dec-2023.Expiration date: 2028-nov-12.No anomalies found related to the problem.To date, (b)(4) items of the same lot have been sold without any similar reported event during the period of review.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.
Event or Problem Description
Revision surgery due to infection after about 1 year and 5 months from primary right knee surgery and after about 3 years and 5 months from left knee surgery.The surgeon performed a washout and revised the left knee`s flex s4l - 12 mm insert to a flex 4l - 14mm insert.The surgeon also revised the right knee`s size4 - 17 mm insert to a size4 - 20mm insert.The surgery was completed successfully.

• Brand Name: GMK SPHERE TOTAL KNEE SYSTEM
• Common Device Name: GMK-SPHERE TIBIAL INSERT - FLEX S4L - 12 MM
• 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: 25297703
• Report Number: 3005180920-2026-00533
• Device Sequence Number: 15782608
• Product Code: JWH
• UDI-Device Identifier: 07630030826573
• UDI-Public: 07630030826573
• Combination Product (Y/N): N
• PMA/510(K) Number: K121416
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2024
• Device Explanted Year: 2026
• 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): 05/27/2026

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: 02.12.0412FL
• Device Lot Number: 2118454
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 05/14/2026
• Initial Report FDA Received Date: 05/27/2026
• Was Device Evaluated by Manufacturer? (Y/N): Device Not Returned to Manufacturer
• Date Device Manufactured: 03/03/2022
• 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 Age: 70 YR
• Patient Sex: Male
• Patient Weight: 103 KG
• Patient Race: White