Devices › Prosthesis, hip, semi-constrained, metal/polymer, cemented
Device brand name · Prosthesis hip
Unknown Femoral Head: medical device reports filed with FDA
423 reports name it, 2005–2026. Manufacturer given most often on reports: Zimmer Biomet. Product code JDI.
- 423
- device reports naming the brand
- 0% of all MAUDE reports · about 20 a year
- 8
- reports, 12 months to August 2026
- 9 in the 12 months before
- 0.5%
- classified as malfunction
- 7.8% across the product code
- 1.4%
- classified as death, as reported
- 6 reports · not verified by FDA
FDA's MAUDE database holds 423 reports that name the brand "Unknown Femoral Head" (prosthesis hip), received between October 2005 and July 2026; the manufacturer given most often on reports is Zimmer Biomet. Spellings of one product vary from report to report.
8 reports arrived in the 12 months to August 2026, down 11% from 9 in the 12 months before. FDA releases MAUDE data monthly; reports can arrive months after an event, so the newest months grow in later releases. The event types recorded are injury (98.1%), death (1.4%) and malfunction (0.5%); across all prosthesis, hip, semi-constrained, metal/polymer, cemented reports (product code JDI) death is recorded in 0.4% and malfunction in 7.8%. Event type is the reporter's classification of the report, not a verified outcome.
The device problems coded most often are insufficient device problem information (38.5%), device dislodged or dislocated (23.9%) and unstable (4.5%). The patient problems coded most often are joint dislocation, pain and reaction. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data."
Reports by month, five years
Reports by the month FDA received them. FDA releases MAUDE data monthly; reports can arrive months after an event, so the newest months grow in later releases.
By year received
Event type and report source
Event type, as classified on the report
Who filed the report
Grey bar: all 70,618 reports carrying product code JDI. Event type is the filer's classification and is not verified by FDA.
Device problems coded
| Device problem (FDA code) | Reports | Share | Share across product code |
|---|---|---|---|
| Insufficient device problem information | 163 | 38.5% | 30.7% |
| Device dislodged or dislocated | 101 | 23.9% | 14.7% |
| Unstable | 19 | 4.5% | 1.1% |
| Corrodedthe device corroded | 18 | 4.3% | 2.9% |
| Material erosion | 11 | 2.6% | 1.1% |
| Fracturea broken bone | 4 | 0.9% | 3.7% |
| Metal shedding debris | 4 | 0.9% | 3.5% |
| Naturally worn | 4 | 0.9% | 11.7% |
| Inadequacy of device shape and/or size | 3 | 0.7% | 0.3% |
| Noise, audible | 3 | 0.7% | 2.4% |
| Breakthe device broke | 2 | 0.5% | 2.7% |
| Degraded | 2 | 0.5% | 1.4% |
| Loss of osseointegration | 2 | 0.5% | 2.1% |
| Migrationthe device moved from where it was placed | 2 | 0.5% | 0.7% |
| Biofilm coating in device | 1 | 0.2% | 0% |
| Detachment of device or device componentpart of the device came off | 1 | 0.2% | 0.8% |
| Device contamination with chemical or other material | 1 | 0.2% | 0.1% |
| Difficult to removethe device was hard to remove | 1 | 0.2% | 0.2% |
| Malposition of device | 1 | 0.2% | 1% |
| Material deformation | 1 | 0.2% | 0.3% |
FDA's device problem codes as entered on the report; one report can carry several. Generic codes such as "no apparent adverse event" are left out.
Patient problems coded
| Patient problem (FDA code) | Reports | Share |
|---|---|---|
| Joint dislocationa dislocated joint | 79 | 18.7% |
| Painpain, site not specified | 38 | 9% |
| Reactiona reaction, type not specified | 31 | 7.3% |
| Injurya physical injury | 30 | 7.1% |
| Inflammationinflammation | 10 | 2.4% |
| Osteolysis | 9 | 2.1% |
| Ambulation or postural difficulties | 7 | 1.7% |
| Deaththe patient died; cause not stated by this term | 6 | 1.4% |
| Foreign body reaction | 6 | 1.4% |
| Necrosisdeath of tissue | 5 | 1.2% |
| Hematomaa collection of blood under the skin or in tissue | 4 | 0.9% |
| Joint swellinga swollen joint | 3 | 0.7% |
| Local reaction | 3 | 0.7% |
| Cellulitisa skin infection | 2 | 0.5% |
| Cyst(s) | 2 | 0.5% |
Patient problem codes are present mainly in reports filed since 2019 and are often blank.
In context
| Measure | Unknown Femoral Head | Product code JDI | All MAUDE reports |
|---|---|---|---|
| Reports | 423 | 70,618 | 26,136,888 |
| Share of that pool | — | 0.6% | 0% |
| Classified as death, per 1,000 reports | 14 | 4 | 9 |
| Classified as injury | 98.1% | 91.3% | 36.2% |
| Classified as malfunction | 0.5% | 7.8% | 62.3% |
| Filed by the manufacturer | 100% | 98.4% | 94.9% |
Shares are of reports, not of devices in use. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data."
Other brands with product code JDI
| Brand | Reports | Latest 12 months | Classified as death |
|---|---|---|---|
| Articuleze M Head 36mm +1 5 | 3,431 | 24 | 0.1% |
| Articuleze M Head 36mm +5 | 3,111 | 24 | 0.1% |
| Unknown Hip Femoral Head | 5,080 | 176 | 0.7% |
| Articuleze M Head 36mm -2 | 1,661 | 10 | 0.2% |
| Articuleze M Head 36mm +8 5 | 1,674 | 11 | 0.1% |
| Unknown Hip Femoral Stem | 4,140 | 79 | 0.8% |
| Unknown Hip | 2,306 | 5 | 1.9% |
| Unknown Head | 2,250 | 103 | 0.7% |
| Unknown Stem | 1,857 | 84 | 0.5% |
| Unknown liner | 2,255 | 75 | 0.4% |
| Unknown Reconstructive Product | 2,579 | 0 | 0.4% |
| Articul/Eze Ball 32 +1 Gr | 695 | 5 | 0.1% |
| UNK Hip Femoral Head Metal | 728 | 67 | 0.1% |
| Articul/Eze Ball 28 +1 5 Gr | 641 | 20 | 0.3% |
| S-Rom M Head 36mm +0 | 827 | 0 | 0% |
Ordered by report count for navigation only. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data." FDA also states that "common products may have a higher number of adverse events due to the higher total number of people using the product."
Questions about Unknown Femoral Head reports
How many FDA reports name Unknown Femoral Head?
423 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 8 in the latest 12 months.
What kinds of events are reported?
injury (98.1%), death (1.4%) and malfunction (0.5%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.
What device problems are coded?
insufficient device problem information (38.5%), device dislodged or dislocated (23.9%), unstable (4.5%), corroded (4.3%) and material erosion (2.6%). These are FDA's device problem codes as entered on the report.
Who files these reports?
manufacturer reports (100%). Manufacturers and user facilities are required to report; voluntary reports come from health professionals and the public.
Do these reports show that Unknown Femoral Head was at fault?
No. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data." FDA adds that "a causal relationship cannot be established between product and reactions listed in a report."
How do I report a problem with a medical device?
Through FDA MedWatch (Form FDA 3500 for health professionals and consumers), or to the manufacturer. See the guide on how to report.
Where this comes from. Counts are built from the openFDA Device Adverse Event (MAUDE) bulk export released 28 Sep 2026, which holds reports FDA received through 31 Aug 2026. Brand, generic and manufacturer names are as written on the reports; product code names come from FDA's device classification. A report counts here when any device it lists carries this brand name after punctuation and capitalisation are normalised. No report narrative, lot number, patient detail or reporter identity is published. See the methodology and sources; FDA's record is authoritative, and corrections are handled within five working days.
Drug data (FAERS) through 30 Jun 2026; device data (MAUDE) through 31 Aug 2026. Not medical advice.