Reported Reactions

Devices › Screw, fixation, bone

Device brand name · Screw fixation bone

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

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

177
device reports naming the brand
0% of all MAUDE reports · about 34 a year
18
reports, 12 months to August 2026
36 in the 12 months before
24.9%
classified as malfunction
30.8% across the product code
0%
classified as death, as reported
0 reports · not verified by FDA

FDA's MAUDE database holds 177 reports that name the brand "Unk - Screws Va Locking" (screw fixation bone), received between April 2021 and June 2026; the manufacturer given most often on reports is Synthes. Spellings of one product vary from report to report.

18 reports arrived in the 12 months to August 2026, down 50% from 36 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 (75.1%) and malfunction (24.9%); 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 break (27.7%), device-device incompatibility (10.2%) and migration (7.3%). The patient problems coded most often are nonunion/delayed-union bone fracture, pain and failure of implant. 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

01530Sep 2021: 1Oct 2021: 1Nov 2021: 6Dec 2021: 12022Jan 2022: 0Feb 2022: 0Mar 2022: 3Apr 2022: 5May 2022: 1Jun 2022: 11Jul 2022: 6Aug 2022: 0Sep 2022: 3Oct 2022: 1Nov 2022: 6Dec 2022: 32023Jan 2023: 0Feb 2023: 0Mar 2023: 3Apr 2023: 2May 2023: 4Jun 2023: 0Jul 2023: 6Aug 2023: 1Sep 2023: 2Oct 2023: 0Nov 2023: 6Dec 2023: 32024Jan 2024: 30Feb 2024: 3Mar 2024: 2Apr 2024: 6May 2024: 5Jun 2024: 0Jul 2024: 0Aug 2024: 0Sep 2024: 5Oct 2024: 8Nov 2024: 4Dec 2024: 32025Jan 2025: 1Feb 2025: 0Mar 2025: 5Apr 2025: 4May 2025: 2Jun 2025: 0Jul 2025: 4Aug 2025: 0Sep 2025: 9Oct 2025: 4Nov 2025: 0Dec 2025: 12026Jan 2026: 0Feb 2026: 0Mar 2026: 0Apr 2026: 0May 2026: 0Jun 2026: 4Jul 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

033662021: 1120212022: 3920222023: 2720232024: 6620242025: 3020252026: 42026

Event type and report source

Event type, as classified on the report

Death0%0
Injury75.1%133
Malfunction24.9%44
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%177
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
Breakthe device broke4927.7%26.4%
Device-device incompatibility1810.2%4.1%
Migrationthe device moved from where it was placed137.3%4.4%
Entrapment of device105.6%1.2%
Difficult to advance52.8%0.4%
Improper or incorrect procedure or method31.7%0.4%
Material twisted/bent31.7%1.4%
Material deformation10.6%1%

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 fracture5229.4%
Painpain, site not specified4525.4%
Failure of implant95.1%
Foreign body in patientpart of a device left in the patient95.1%
Numbnessnumbness95.1%
Hypersensitivity/allergic reaction84.5%
Rashskin rash84.5%
Appropriate clinical signs, symptoms and conditions term/code not available63.4%
Malunion of bone42.3%
Physical asymmetry42.3%
Bone fracture(s)31.7%
Falla fall21.1%
Arthritis10.6%
Bone notching10.6%
Hematomaa collection of blood under the skin or in tissue10.6%

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

In context

MeasureUnk - Screws Va LockingProduct code HWCAll MAUDE reports
Reports17758,94626,136,888
Share of that pool—0.3%0%
Classified as death, per 1,000 reports019
Classified as injury75.1%67.2%36.2%
Classified as malfunction24.9%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 Nail Locking211190%
UNK - Screws: 2.7 mm VA Locking204220%
Unk - Screws Cannulated19090.5%
Unk - Screws25600%
Locking Screw24130%

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 Va Locking reports

How many FDA reports name Unk - Screws Va Locking?

177 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 18 in the latest 12 months.

What kinds of events are reported?

injury (75.1%) and malfunction (24.9%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

break (27.7%), device-device incompatibility (10.2%), migration (7.3%), entrapment of device (5.6%) and difficult to advance (2.8%). 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 Va 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.