MAUDE Adverse Event Report: MEDACTA INTERNATIONAL SA GMK SPHERE TOTAL KNEE SYSTEM; TIBIAL INSERT FIXED SPHERE FLEX SIZE 4/12 MM R E-CROSS

Model Number	02.12.E0412FR
Medical Device Problem Code	Adverse Event Without Identified Device or Use Problem (2993)
Health Effect - Clinical Code	Loss of Range of Motion (2032)
Date of Event	01/22/2025
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
Batch review performed on 29 january 2025: (b)(4) items manufactured and released on 19-may-2023.Expiration date: 2028-05-02.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.Root cause: 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.
Event or Problem Description
At about 1 year 1 month after the primary, the patient came in reporting tightness and the cause is unknown.The surgeon revised the patient's natural patella and downsized the poly (12 to 11 mm).The surgery was completed successfully.

• Brand Name: GMK SPHERE TOTAL KNEE SYSTEM
• Common Device Name: TIBIAL INSERT FIXED SPHERE FLEX SIZE 4/12 MM R E-CROSS
• 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: 21354702
• Report Number: 3005180920-2025-00093
• Device Sequence Number: 20792317
• Product Code: JWH
• UDI-Device Identifier: 07630971261846
• UDI-Public: 07630971261846
• Combination Product (Y/N): N
• Initial Reporter State: MO
• Initial Reporter Country: US
• PMA/510(K) Number: K202022
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2023
• Device Explanted Year: 2025
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Company Representative
• Initial Reporter Occupation: Non-Healthcare Professional
• Type of Report: Initial
• Report Date (Section B): 02/11/2025

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.E0412FR
• Device Lot Number: 2308734
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 01/22/2025
• Initial Report FDA Received Date: 02/11/2025
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 05/19/2023
• 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: 73 YR
• Patient Sex: Male