Reported Reactions

Devices › Appliance, fixation, nail/blade/plate combination, multiple component

Device brand name · Appliance fixation nail/blade/plate combination multiple component

Unk - Nail Head Elements Fns Bolt: medical device reports filed with FDA

185 reports name it, 2019–2025. Manufacturer given most often on reports: Synthes. Product code KTT.

185
device reports naming the brand
0% of all MAUDE reports · about 26 a year
12
reports, 12 months to August 2026
16 in the 12 months before
8.1%
classified as malfunction
29.1% across the product code
0%
classified as death, as reported
0 reports · not verified by FDA

FDA's MAUDE database holds 185 reports that name the brand "Unk - Nail Head Elements Fns Bolt" (appliance fixation nail/blade/plate combination multiple component), received between May 2019 and December 2025; the manufacturer given most often on reports is Synthes. Spellings of one product vary from report to report.

12 reports arrived in the 12 months to August 2026, down 25% from 16 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 (91.9%) and malfunction (8.1%); across all appliance, fixation, nail/blade/plate combination, multiple component reports (product code KTT) death is recorded in 0.3% and malfunction in 29.1%. Event type is the reporter's classification of the report, not a verified outcome.

The device problems coded most often are migration (31.4%), break (3.8%) and device-device incompatibility (2.7%). The patient problems coded most often are pain, necrosis and bone fracture(s). 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

0611Sep 2021: 1Oct 2021: 2Nov 2021: 4Dec 2021: 22022Jan 2022: 1Feb 2022: 1Mar 2022: 3Apr 2022: 2May 2022: 6Jun 2022: 1Jul 2022: 1Aug 2022: 3Sep 2022: 1Oct 2022: 1Nov 2022: 1Dec 2022: 02023Jan 2023: 1Feb 2023: 0Mar 2023: 3Apr 2023: 1May 2023: 2Jun 2023: 1Jul 2023: 1Aug 2023: 3Sep 2023: 2Oct 2023: 0Nov 2023: 0Dec 2023: 102024Jan 2024: 11Feb 2024: 4Mar 2024: 1Apr 2024: 4May 2024: 0Jun 2024: 1Jul 2024: 2Aug 2024: 2Sep 2024: 2Oct 2024: 1Nov 2024: 4Dec 2024: 42025Jan 2025: 2Feb 2025: 1Mar 2025: 0Apr 2025: 1May 2025: 0Jun 2025: 0Jul 2025: 1Aug 2025: 0Sep 2025: 2Oct 2025: 1Nov 2025: 1Dec 2025: 82026Jan 2026: 0Feb 2026: 0Mar 2026: 0Apr 2026: 0May 2026: 0Jun 2026: 0Jul 2026: 0Aug 2026: 0

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

018362019: 1520192020: 3620202021: 3620212022: 2120222023: 2420232024: 3620242025: 172025

Event type and report source

Event type, as classified on the report

Death0%0
Injury91.9%170
Malfunction8.1%15
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%185
Voluntary report0%0
User facility report0%0
Distributor report0%0
Not given0%0

Grey bar: all 10,126 reports carrying product code KTT. Event type is the filer's classification and is not verified by FDA.

Device problems coded

Device problem (FDA code)ReportsShareShare across product code
Migrationthe device moved from where it was placed5831.4%5.4%
Breakthe device broke73.8%22.2%
Device-device incompatibility52.7%5.6%
Defective devicethe device was defective10.5%0.3%
Device slipped10.5%1.9%
Difficult to advance10.5%0.1%
Material deformation10.5%1.1%
Material integrity problema problem with the device material10.5%0.2%
Migration or expulsion of device10.5%1.7%

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)ReportsShare
Painpain, site not specified3418.4%
Necrosisdeath of tissue3116.8%
Bone fracture(s)2614.1%
Nonunion/delayed-union bone fracture2413%
Appropriate clinical signs, symptoms and conditions term/code not available137%
Failure of implant126.5%
Physical asymmetry105.4%
Joint dislocationa dislocated joint52.7%
Falla fall42.2%
Discomfortdiscomfort31.6%
Ambulation or postural difficulties21.1%
Arthritis21.1%
Bone notching21.1%
Impaired healingslow healing21.1%
Limb fracture21.1%

Patient problem codes are present mainly in reports filed since 2019 and are often blank.

In context

MeasureUnk - Nail Head Elements Fns BoltProduct code KTTAll MAUDE reports
Reports18510,12626,136,888
Share of that pool—1.8%0%
Classified as death, per 1,000 reports039
Classified as injury91.9%70.3%36.2%
Classified as malfunction8.1%29.1%62.3%
Filed by the manufacturer100%99.1%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 KTT

BrandReportsLatest 12 monthsClassified as death
UNK - Constructs: DHS/DCS267171.9%
Femoral Neck System Plate 1 Hole - Sterile20310%
Unknown Hoffmann Lrf18100%
R3 Depth Gauge154120%
Unk - Nail Head Elements Fns Antirotation18260%
UNK - Screws: FNS Locking150250%
Trauma Implant26400.4%
Unk - Constructs Pfna16601.2%
UNK - Constructs: Plate/Screws85090%
Helical Blade Coupling Screw30500%
Unkn Taylor Spatial Frame Exfix Dev17500%
T-Handle358170%
Unknown Apex Pin38100.5%
Ebi Xfix Dynafix16400%
Unk Screw195630%

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 Unk - Nail Head Elements Fns Bolt reports

How many FDA reports name Unk - Nail Head Elements Fns Bolt?

185 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 12 in the latest 12 months.

What kinds of events are reported?

injury (91.9%) and malfunction (8.1%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

migration (31.4%), break (3.8%), device-device incompatibility (2.7%), defective device (0.5%) and device slipped (0.5%). 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 Unk - Nail Head Elements Fns Bolt 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.