Reported Reactions

Devices › Screw, fixation, bone

Device brand name · Screw fixation bone

UNK - Screws: Trauma: medical device reports filed with FDA

3,576 reports name it, 2019–2026. Manufacturer given most often on reports: Synthes. Product code HWC.

3,576
device reports naming the brand
0% of all MAUDE reports · about 477 a year
288
reports, 12 months to August 2026
313 in the 12 months before
16.6%
classified as malfunction
30.8% across the product code
0%
classified as death, as reported
1 reports · not verified by FDA

3,576 medical device reports received by FDA name the brand "UNK - Screws: Trauma" (screw fixation bone); the manufacturer given most often on reports is Synthes; received from January 2019 to August 2026. Brand names are as the reporter or manufacturer wrote them, so one product can appear under several spellings.

288 reports arrived in the 12 months to August 2026, close to the 313 of 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 (83.4%) and malfunction (16.6%); 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 (17.8%), migration (14%) and device-device incompatibility (8.9%). 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

057114Sep 2021: 17Oct 2021: 33Nov 2021: 17Dec 2021: 192022Jan 2022: 14Feb 2022: 9Mar 2022: 27Apr 2022: 15May 2022: 12Jun 2022: 12Jul 2022: 42Aug 2022: 22Sep 2022: 18Oct 2022: 114Nov 2022: 52Dec 2022: 472023Jan 2023: 45Feb 2023: 33Mar 2023: 38Apr 2023: 33May 2023: 50Jun 2023: 64Jul 2023: 40Aug 2023: 79Sep 2023: 43Oct 2023: 65Nov 2023: 28Dec 2023: 242024Jan 2024: 17Feb 2024: 28Mar 2024: 32Apr 2024: 66May 2024: 46Jun 2024: 20Jul 2024: 29Aug 2024: 14Sep 2024: 50Oct 2024: 27Nov 2024: 27Dec 2024: 282025Jan 2025: 26Feb 2025: 8Mar 2025: 12Apr 2025: 15May 2025: 65Jun 2025: 23Jul 2025: 19Aug 2025: 13Sep 2025: 17Oct 2025: 15Nov 2025: 39Dec 2025: 362026Jan 2026: 28Feb 2026: 4Mar 2026: 11Apr 2026: 12May 2026: 19Jun 2026: 23Jul 2026: 63Aug 2026: 21

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

04188352019: 55420192020: 83520202021: 40820212022: 38420222023: 54220232024: 38420242025: 28820252026: 1812026

Event type and report source

Event type, as classified on the report

Death0%1
Injury83.4%2,982
Malfunction16.6%593
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%3,576
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 broke63817.8%26.4%
Migrationthe device moved from where it was placed50214%4.4%
Device-device incompatibility3188.9%4.1%
Device slipped1203.4%1.9%
Material twisted/bent1063%1.4%
Entrapment of device842.3%1.2%
Migration or expulsion of device270.8%2.1%
Unintended movement210.6%0.9%
Difficult to advance150.4%0.4%
Material deformation140.4%1%
Loosening of implant not related to bone-ingrowth110.3%0.6%
Loose or intermittent connection80.2%0.6%
Material integrity problema problem with the device material60.2%0.2%
Improper or incorrect procedure or method40.1%0.4%
Defective devicethe device was defective30.1%0.1%
Manufacturing, packaging or shipping problem30.1%0.5%
Crackthe device cracked20.1%0.5%
Failure to advance20.1%0.3%
Contamination /decontamination problem10%0%
Detachment of device or device componentpart of the device came off10%0.6%

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 fracture58616.4%
Painpain, site not specified43312.1%
Failure of implant3409.5%
Bone fracture(s)1704.8%
Appropriate clinical signs, symptoms and conditions term/code not available1464.1%
Injurya physical injury1073%
Loss of range of motion762.1%
Post operative wound infection691.9%
Foreign body in patientpart of a device left in the patient661.8%
Discomfortdiscomfort651.8%
Necrosisdeath of tissue591.6%
Malunion of bone551.5%
Impaired healingslow healing531.5%
Hypersensitivity/allergic reaction521.5%
Nerve damage501.4%

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

In context

MeasureUNK - Screws: TraumaProduct code HWCAll MAUDE reports
Reports3,57658,94626,136,888
Share of that pool—6.1%0%
Classified as death, per 1,000 reports019
Classified as injury83.4%67.2%36.2%
Classified as malfunction16.6%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: 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%
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: Trauma reports

How many FDA reports name UNK - Screws: Trauma?

3,576 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 288 in the latest 12 months.

What kinds of events are reported?

injury (83.4%) and malfunction (16.6%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

break (17.8%), migration (14%), device-device incompatibility (8.9%), device slipped (3.4%) and material twisted/bent (3%). 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: Trauma 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.