Triathlon 5554-L-381Recalls & reported problems
Howmedica Osteonics Corp. · Metal Backed Patella · Class 2 · Implant
All models of Triathlon (608)
Data updated Oct 18, 2026 from official FDA records · Editorial policy
- Adverse event reports
- 9
- Deaths reported
- 0
- Injuries reported
- 9
- Recalls naming it
- 0
Summary
The FDA's MAUDE database contains 9 adverse event reports that list this exact device (DI 07613327049916), received between Oct 25, 2018 and Jun 19, 2023 — classified as 9 injuries.
The most frequently reported specific device problem is “Noise, Audible” (4 reports).
Reports come from manufacturers, hospitals and patients and are not verified by the FDA. A report does not prove the device caused the event, and counts can't be used to compare devices or estimate failure rates. What reports can and can't tell you · How this data works · Data updated Oct 18, 2026.
Most reported problems
Device problems
- Noise, Audible4
- Naturally Worn3
- Device Dislodged or Dislocated2
- Unstable2
- Degraded1
- Detachment of Device or Device Component1
- Material Separation1
- Unintended Movement1
Patient problems
- Pain8
- Injury5
Recent adverse event reports
The 9 most recent of 9 reports, in the reporter's own words as published by the FDA.
InjuryJun 19, 2023Detachment of Device or Device Component; Device Dislodged or Dislocated; Detachment of Device or Device Component; Device Dislodged or Dislocated
IT WAS REPORTED THAT THE PATIENT'S LEFT KNEE WAS REVISED. AFTER BUMPING HIS KNEE ON HIS TRACTOR (DATE OF INCIDENT UNKNOWN), PATIENT EXPERIENCED CHRONIC PAIN IN THE KNEE. UPON SCOPING THE KNEE, THE POLY PORTION OF THE CEMENTED METAL-BACKED PATELLA WAS FOUND TO BE SEPARATED FROM THE METAL PORTION. THE PATELLAR COMPONENT AND INSERT WERE REVISED.
Patient problems: Pain
MAUDE report 17151115 ↗InjuryApr 6, 2022Device Dislodged or Dislocated; Naturally Worn; Unintended Movement; Device Dislodged or Dislocated; Naturally Worn; Unintended Movement
IT WAS REPORTED THAT THE PATIENT'S RIGHT KNEE WAS REVISED. AS REPORTED: "KNEE PAIN AND GRINDING." A 9X3 CR INSERT AND A38 BEADED PATELLA WERE REVISED.
Patient problems: Pain
MAUDE report 14030115 ↗InjuryFeb 17, 2021Noise, Audible
IT WAS REPORTED THAT THE PATIENT'S LEFT KNEE WAS REVISED DUE TO PAIN AND CLICKING. A TRIATHLON 8X11 CR TIBIAL BEARING AND A 38X11 ASYMMETRIC PATELLA WERE REVISED. REP CONFIRMED THAT NO FURTHER INFORMATION WOULD BE RELEASED BY THE HOSPITAL OR SURGEON AND EXPLANTS ARE HOSPITAL RETAINED.
Patient problems: Pain
MAUDE report 11339987 ↗InjuryDec 4, 2020Naturally Worn; Noise, Audible; Naturally Worn; Noise, Audible
IT WAS REPORTED THAT THE PATIENT'S RIGHT KNEE WAS REVISED DUE TO CLICKING NOISE AND PAIN. REP CONFIRMED THAT THE SURGEON REPORTED THE PATELLAR COMPONENT WAS ARTICULATING AGAINST THE FEMORAL COMPONENT. THE PATELLAR COMPONENT AND INSERT WERE REVISED.
Patient problems: Pain
MAUDE report 10949480 ↗InjuryApr 6, 2020Unstable; Noise, Audible; Unstable; Noise, Audible
AS REPORTED: "CLICKING AND ANTERIOR RIGHT KNEE PAIN. ALL AVAILABLE INFORMATION SUBMITTED." REP PROVIDED AN OFFICE NOTE WHICH REPORTS THE FOLLOWING: "HE HAS HAD PERSISTENT SWELLING IN THE KNEE PROBABLY SINCE SURGERY...DEVELOPED INCREASING DISCOMFORT AND SWELLING IN THE KNEE...A SMALL AMOUNT OF CORONAL INSTABILITY..." THE PATIENT'S INSERT AND PATELLAR COMPONENT WERE REVISED.
Patient problems: Injury; Pain
MAUDE report 9928571 ↗InjuryMar 9, 2020Noise, Audible; Noise, Audible
IT WAS REPORTED THE PATIENT'S LEFT KNEE WAS REVISED. AS REPORTED BY THE REP: "CLICKING AND PAIN. ALL AVAILABLE INFORMATION SUBMITTED." AN 8X11 CR INSERT AND A38 BEADED PATELLA WERE REVISED.
Patient problems: Injury; Pain
MAUDE report 9805799 ↗InjuryMay 22, 2019Unstable; Unstable
IT WAS REPORTED THROUGH THE COMMUNICATION OF AN ATTORNEY THAT ALLEGEDLY THE PATIENT WAS REVISED DUE TO "UNSTABLE LEFT TOTAL KNEE REPLACEMENT".
Patient problems: Injury
MAUDE report 8631829 ↗InjuryJan 9, 2019Naturally Worn; Naturally Worn
IT WAS REPORTED THAT THE PATIENT'S LEFT KNEE WAS REVISED DUE TO PAIN IN THE ANTERIOR KNEE. AN A38 BEADED PATELLA WAS REVISED TO AN A38 X3 PATELLA.
Patient problems: Injury; Pain
MAUDE report 8232708 ↗InjuryOct 25, 2018Degraded; Material Separation; Degraded; Material Separation
IT WAS REPORTED THAT PATIENT'S RIGHT KNEE WAS REVISED DUE TO PAIN.
Patient problems: Injury; Pain
MAUDE report 8006233 ↗
Other PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, COATED, POLYMER/METAL/POLYMER devices
- ATTUNE 1512-14-050Depuy (Ireland) · PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, COATED, POLYMER/METAL/POLYMER106 reports
- ATTUNE 1504-40-205Depuy (Ireland) · PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, COATED, POLYMER/METAL/POLYMER1 recall53 reports
- ATTUNE 1504-40-105Depuy (Ireland) · PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, COATED, POLYMER/METAL/POLYMER1 recall46 reports
- ATTUNE 1547-06-001Depuy (Ireland) · PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, COATED, POLYMER/METAL/POLYMER1 recall37 reports
- ATTUNE 1513-12-060Depuy (Ireland) · PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, COATED, POLYMER/METAL/POLYMER72 reports
- Triathlon 5521-B-300Howmedica Osteonics Corp. · PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, COATED, POLYMER/METAL/POLYMER1 recall19 reports
- Triathlon 5531-G-709-EHowmedica Osteonics Corp. · PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, COATED, POLYMER/METAL/POLYMER1 recall19 reports
- ATTUNE 1512-16-080Depuy (Ireland) · PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, COATED, POLYMER/METAL/POLYMER1 recall16 reports
Sources and updates
- Device record: FDA GUDID, file dated Oct 13, 2026 · View this device in AccessGUDID ↗
- Adverse event reports: FDA MAUDE, file dated Oct 14, 2026 · each report above links to its original FDA record
- Recalls: FDA Medical Device Recalls, file dated Oct 16, 2026
- Page last rebuilt: Oct 18, 2026. Data downloaded through openFDA, which notes it is not validated for clinical or regulatory use.
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