MAUDE Adverse Event Report: STRYKER ORTHOPAEDICS-MAHWAH TRITANIUM BPLATE TRIATHLON S6; PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, CO

Catalog Number	5536B600
Medical Device Problem Codes	Loss of Osseointegration (2408); Osseointegration Problem (3003)
Health Effect - Clinical Codes	Pain (1994); Inadequate Osseointegration (2646)
Date of Event	08/05/2025
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
Review of the device history records indicate devices were manufactured and accepted into final stock with no relevant reported discrepancies.There have been no other similar events for the lot referenced.An evaluation of the device cannot be performed as the device was not returned to the manufacturer.Should additional information become available it will be reported in a supplemental report upon completion of the investigation.
Event or Problem Description
It was reported that the patient's right knee was revised due to tibial pain.Intra-operatively, it was noted that there was bony ingrowth on the lateral side of the baseplate, but not on the medial side.The baseplate and insert were revised.There are no allegations against the revised insert.Rep confirmed that no further information will be released by the hospital or surgeon.
Event or Problem Description
No new information.
Additional Manufacturer Narrative
Reported event: an event regarding loosening involving a triathlon baseplate was reported.The event was not confirmed.Method & results: -product evaluation and results: the reported device was not returned however photographs were provided for review.The photographs show a recently explanted baseplate and insert with the presence of biological matter.There is ingrowth presence on one side of the baseplate but not the other.-clinician review: no medical records were received for review with a clinical consultant.-product history review: review of the product history records indicate the reported device was manufactured with no reported relevant discrepancies.-complaint history review: there have been no other similar events for the lot referenced.Conclusions: it was reported that the patient's right knee was revised due to tibial pain.Intra-operatively, it was noted that there was bony ingrowth on the lateral side of the baseplate, but not on the medial side.The baseplate and insert were revised.There are no allegations against the revised insert.Rep confirmed that no further information will be released by the hospital or surgeon.The reported device was not returned however photographs were provided for review.The photographs show a recently explanted baseplate and insert with the presence of biological matter.There is ingrowth presence on one side of the baseplate but not the other.The exact cause of the event could not be determined because insufficient information was provided.Additional information including operative reports, progress notes, x-rays and return of the device are needed to fully investigate the event.If further information becomes available or the product is returned, this investigation will be re-opened.

• Brand Name: TRITANIUM BPLATE TRIATHLON S6
• Common Device Name: PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, CO
• Manufacturer (Section D): STRYKER ORTHOPAEDICS-MAHWAH; 325 corporate drive; mahwah NJ 07430
• Manufacturer (Section G): STRYKER ORTHOPAEDICS-LIMERICK; raheen business park; limerick NA ; EI NA
• Manufacturer Contact: anna ryan ; raheen business park; limerick NA ; EI NA ; 61498200
• MDR Report Key: 22919845
• Report Number: 0002249697-2025-00924
• Device Sequence Number: 16040798
• Product Code: MBH
• UDI-Device Identifier: 07613327041514
• UDI-Public: 07613327041514
• Combination Product (Y/N): N
• Initial Reporter State: RI
• Initial Reporter Country: US
• PMA/510(K) Number: K141056
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2024
• Device Explanted Year: 2025
• Reporter Type: Manufacturer
• Report Source: Health Professional
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 12/18/2025

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 Catalogue Number: 5536B600
• Device Lot Number: CTD118103
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Follow-Up
• Initial Date Received by Manufacturer: 08/05/2025
• Supplement Date Received by Manufacturer: 11/25/2025
• Initial Report FDA Received Date: 08/28/2025
• Supplement Report FDA Received Date: 12/18/2025
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 01/22/2024
• 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: Hospitalization; Required Intervention
• Patient Age: 76 YR
• Patient Sex: Male
• Patient Weight: 102 KG