U2 Total Knee System 2103-1640Recalls & reported problems
United Orthopedic Corp. · Femoral Component, Cruciate Retaining, PF+, #4, Right · Class 2 · Implant
All models of U2 Total Knee System (26)
Data updated Oct 16, 2026 from official FDA records · Editorial policy
- Adverse event reports
- 1
- Deaths reported
- 0
- Injuries reported
- 1
- Recalls naming it
- 0
Summary
The FDA's MAUDE database contains 1 adverse event report that list this exact device (DI 04719872146254), received between Jun 25, 2026 and Jun 25, 2026 — classified as 1 injury.
The most frequently reported specific device problem is “Insufficient Device Problem Information” (1 report).
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 16, 2026.
Reports received per month
Most reported problems
Device problems
- Insufficient Device Problem Information1
Patient problems
- Limb Pain1
- Loss of Range of Motion1
Recent adverse event reports
The 1 most recent of 1 reports, in the reporter's own words as published by the FDA.
InjuryJun 25, 2026Insufficient Device Problem Information
A COMPLAINT CASE REGARDING THE FEMORAL COMPONENT WAS RECEIVED BY THE U.S. SUBSIDIARY ON (B)(6) 2026. A 59-YEAR-OLD FEMALE PATIENT UNDERWENT TKA SURGERY USING THE U2 TOTAL KNEE SYSTEM ON (B)(6) 2025. THE PATIENT RETURNED WITH CONTINUED PAIN, WORSENED PAIN, AND STIFFNESS. THE X-RAY SHOWED SEVERAL SMALL RADIOPAQUE SPOTS ADJACENT TO THE BONE CUT SURFACE OF THE FEMORAL COMPONENT. THE PHYSICIAN INDICATES THAT FURTHER EVALUATION OF THE PATIENT'S CONDITION IS NEEDED TO DETERMINE WHETHER REVISION SURGERY IS REQUIRED.
Patient problems: Limb Pain; Loss of Range of Motion
MAUDE report 25631332 ↗
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 5531-G-709-EHowmedica Osteonics Corp. · PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, COATED, POLYMER/METAL/POLYMER1 recall19 reports
- Triathlon 5521-B-300Howmedica Osteonics Corp. · PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, COATED, POLYMER/METAL/POLYMER1 recall19 reports
- Triathlon 5531-G-610-EHowmedica Osteonics Corp. · 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 16, 2026. Data downloaded through openFDA, which notes it is not validated for clinical or regulatory use.
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