MAUDE Adverse Event Report: MEDACTA INTERNATIONAL SA GMK SPHERE TOTAL KNEE SYSTEM; GMK-SPHERE TIBIAL INSERT FIXED SPHERE FLEX SIZE 4/10 MM R

Model Number	02.12.0410FR
Medical Device Problem Code	Appropriate Device Problem Term/Code Not Available (3191)
Health Effect - Clinical Code	Joint Laxity (4526)
Date of Event	02/03/2025
Type of Reportable Event	Serious Injury
Event or Problem Description
At about 2 years 11 months after the primary, the patient came in complaining of mid flexion instability.The surgeon revised the insert (10 mm to 14 mm) and resurfaced the patient's natural patella.The surgery was completed successfully.
Additional Manufacturer Narrative
Batch review performed on 10 february 2025.Lot 2110142: 150 items manufactured and released on 04-oct-2021.Expiration date: 2026-09-21.No anomalies found related to the problem.To date, (b)(4) items of the same lot have been sold with no similar reported events during the period of review.The surgeon resurfaced the patient's natural patella, which is a common practice in case of not patella resurfacing during primary surgery.Moreover, 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 devices may have caused or contributed to the event.

• Brand Name: GMK SPHERE TOTAL KNEE SYSTEM
• Common Device Name: GMK-SPHERE TIBIAL INSERT FIXED SPHERE FLEX SIZE 4/10 MM R
• Manufacturer (Section D): MEDACTA INTERNATIONAL SA; strada regina; castel san pietro, switzerland 6874 ; SZ 6874
• Manufacturer (Section G): MEDACTA INTERNATIONAL SA; strada regina; castel san pietro, switzerland 6874 ; SZ 6874
• Manufacturer Contact: marco giannessi ; strada regina; castel san pietro, switzerland 6874 ; SZ 6874
• MDR Report Key: 21467672
• Report Number: 3005180920-2025-00131
• Device Sequence Number: 3492203
• Product Code: JWH
• UDI-Device Identifier: 07630030826542
• UDI-Public: 07630030826542
• Combination Product (Y/N): N
• Initial Reporter Country: US
• PMA/510(K) Number: K121416
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2022
• Device Explanted Year: 2025
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Other
• Initial Reporter Occupation: Non-Healthcare Professional
• Type of Report: Initial
• Report Date (Section B): 02/26/2025

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 Expiration Date: 09/21/2026
• Device Model Number: 02.12.0410FR
• Device Lot Number: 2110142
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 02/03/2025
• Initial Report FDA Received Date: 02/26/2025
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 10/04/2021
• Is the Device Labeled for Single Use? (Y/N): Yes
• Usage of Device: Initial
• Patient Sequence Number: 1
• Outcome Attributed to Adverse Event: Required Intervention
• Patient Sex: Unknown