MAUDE Adverse Event Report: MEDACTA INTERNATIONAL SA GMK SPHERE TOTAL KNEE SYSTEM; GMK-SPHERE TIBIAL INSERT - FLEX S5L - 14 MM

Model Number	02.12.0514FL
Medical Device Problem Code	Adverse Event Without Identified Device or Use Problem (2993)
Health Effect - Clinical Code	Joint Laxity (4526)
Date of Event	06/29/2026
Type of Reportable Event	Serious Injury
Event or Problem Description
The patient had knee instability and the cause is unknown.There are no indications of trauma or a fall.At about 7 years and 10 months post primary the surgeon revised the flex s5l - 14mm insert to a flex 5l - 17mm to increase stability.The surgery was completed successfully.
Additional Manufacturer Narrative
Batch review performed on 6 july 2026: lot 173782: (b)(4) items manufactured and released on 03-nov-2017.Expiration date: 16-oct-2022.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.Root 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 - FLEX S5L - 14 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: 25778123
• Report Number: 3005180920-2026-00701
• Device Sequence Number: 13433675
• Product Code: JWH
• UDI-Device Identifier: 07630030826818
• UDI-Public: 07630030826818
• Combination Product (Y/N): N
• PMA/510(K) Number: K121416
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2018
• 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): 07/10/2026

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 Expiration Date: 10/16/2022
• Device Model Number: 02.12.0514FL
• Device Lot Number: 173782
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 06/29/2026
• Initial Report FDA Received Date: 07/10/2026
• Was Device Evaluated by Manufacturer? (Y/N): Device Not Returned to Manufacturer
• Date Device Manufactured: 11/03/2017
• 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: Male
• Patient Race: White