Reported Reactions

Devices › Screw, fixation, bone

Device brand name · Screw fixation bone

Unk - Screws Nail Locking: medical device reports filed with FDA

211 reports name it, 2021–2026. Manufacturer given most often on reports: Synthes. Product code HWC.

211
device reports naming the brand
0% of all MAUDE reports · about 41 a year
19
reports, 12 months to August 2026
51 in the 12 months before
17.5%
classified as malfunction
30.8% across the product code
0%
classified as death, as reported
0 reports · not verified by FDA

211 medical device reports received by FDA name the brand "Unk - Screws Nail Locking" (screw fixation bone); the manufacturer given most often on reports is Synthes; received from May 2021 to April 2026. Brand names are as the reporter or manufacturer wrote them, so one product can appear under several spellings.

19 reports arrived in the 12 months to August 2026, down 63% from 51 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 (82.5%) and malfunction (17.5%); across all screw, fixation, bone reports (product code HWC) death is recorded in 0.1% and malfunction in 30.8%. Event type is the reporter's classification of the report, not a verified outcome.

The device problems coded most often are migration (34.6%), break (5.2%) and device-device incompatibility (4.7%). The patient problems coded most often are nonunion/delayed-union bone fracture, pain and post operative wound infection. 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

0714Sep 2021: 5Oct 2021: 1Nov 2021: 1Dec 2021: 92022Jan 2022: 3Feb 2022: 0Mar 2022: 5Apr 2022: 2May 2022: 1Jun 2022: 0Jul 2022: 1Aug 2022: 0Sep 2022: 3Oct 2022: 0Nov 2022: 2Dec 2022: 22023Jan 2023: 3Feb 2023: 2Mar 2023: 5Apr 2023: 3May 2023: 9Jun 2023: 1Jul 2023: 6Aug 2023: 0Sep 2023: 6Oct 2023: 0Nov 2023: 8Dec 2023: 02024Jan 2024: 2Feb 2024: 14Mar 2024: 8Apr 2024: 4May 2024: 11Jun 2024: 3Jul 2024: 0Aug 2024: 6Sep 2024: 3Oct 2024: 4Nov 2024: 0Dec 2024: 02025Jan 2025: 0Feb 2025: 4Mar 2025: 13Apr 2025: 3May 2025: 8Jun 2025: 1Jul 2025: 5Aug 2025: 10Sep 2025: 2Oct 2025: 5Nov 2025: 7Dec 2025: 02026Jan 2026: 0Feb 2026: 0Mar 2026: 3Apr 2026: 2May 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

029582021: 3120212022: 1920222023: 4320232024: 5520242025: 5820252026: 52026

Event type and report source

Event type, as classified on the report

Death0%0
Injury82.5%174
Malfunction17.5%37
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%211
Voluntary report0%0
User facility report0%0
Distributor report0%0
Not given0%0

Grey bar: all 58,946 reports carrying product code HWC. 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 placed7334.6%4.4%
Breakthe device broke115.2%26.4%
Device-device incompatibility104.7%4.1%
Device slipped31.4%1.9%
Difficult to advance10.5%0.4%

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
Nonunion/delayed-union bone fracture8741.2%
Painpain, site not specified199%
Post operative wound infection146.6%
Bone fracture(s)125.7%
Appropriate clinical signs, symptoms and conditions term/code not available94.3%
Malunion of bone73.3%
Thrombosis/thrombus62.8%
Failure of implant41.9%
Physical asymmetry31.4%
Ambulation or postural difficulties20.9%
Falla fall20.9%
Joint dislocationa dislocated joint20.9%
Loss of range of motion20.9%
Deformity/ disfigurement10.5%
Hypersensitivity/allergic reaction10.5%

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

In context

MeasureUnk - Screws Nail LockingProduct code HWCAll MAUDE reports
Reports21158,94626,136,888
Share of that pool—0.4%0%
Classified as death, per 1,000 reports019
Classified as injury82.5%67.2%36.2%
Classified as malfunction17.5%30.8%62.3%
Filed by the manufacturer100%97.3%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 HWC

BrandReportsLatest 12 monthsClassified as death
UNK - Screws: Trauma3,5762880%
UNK - Screws: Locking2,331980%
Unk - Screws Cortex889160%
Unknown Screw1,2221560%
Screw64700%
UNK - Screws: Nail Distal Locking444120.2%
Unknown Screws652231.7%
UNK - Screws: CMF4102800%
UNK - Screws: Locking: Trauma276340%
Unk - Screws 3 5 Mm Cortex220330%
UNK - Screws: 2.7 mm VA Locking204220%
Unk - Screws Cannulated19090.5%
Unk - Screws25600%
Locking Screw24130%
Ni32,9391,5871.8%

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 - Screws Nail Locking reports

How many FDA reports name Unk - Screws Nail Locking?

211 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 19 in the latest 12 months.

What kinds of events are reported?

injury (82.5%) and malfunction (17.5%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

migration (34.6%), break (5.2%), device-device incompatibility (4.7%), device slipped (1.4%) and difficult to advance (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 - Screws Nail Locking 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.