Reported Reactions

Devices › Screw, fixation, bone

Device brand name · Screw fixation bone

Unk - Screws Cannulated: medical device reports filed with FDA

190 reports name it, 2019–2026. Manufacturer given most often on reports: Oberdorf Synthes Produktions. Product code HWC.

190
device reports naming the brand
0% of all MAUDE reports · about 27 a year
9
reports, 12 months to August 2026
12 in the 12 months before
10%
classified as malfunction
30.8% across the product code
0.5%
classified as death, as reported
1 reports · not verified by FDA

FDA's MAUDE database holds 190 reports that name the brand "Unk - Screws Cannulated" (screw fixation bone), received between August 2019 and May 2026; the manufacturer given most often on reports is Oberdorf Synthes Produktions. Spellings of one product vary from report to report.

9 reports arrived in the 12 months to August 2026, down 25% from 12 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 (89.5%), malfunction (10%) and death (0.5%); 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 (8.9%), device slipped (6.8%) and loosening of implant not related to bone-ingrowth (3.2%). The patient problems coded most often are failure of implant, pain and nonunion/delayed-union bone fracture. 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

048Sep 2021: 1Oct 2021: 8Nov 2021: 3Dec 2021: 22022Jan 2022: 0Feb 2022: 1Mar 2022: 0Apr 2022: 2May 2022: 1Jun 2022: 1Jul 2022: 0Aug 2022: 0Sep 2022: 0Oct 2022: 0Nov 2022: 0Dec 2022: 02023Jan 2023: 0Feb 2023: 0Mar 2023: 0Apr 2023: 1May 2023: 0Jun 2023: 0Jul 2023: 1Aug 2023: 2Sep 2023: 1Oct 2023: 0Nov 2023: 0Dec 2023: 02024Jan 2024: 1Feb 2024: 0Mar 2024: 2Apr 2024: 0May 2024: 0Jun 2024: 0Jul 2024: 0Aug 2024: 0Sep 2024: 0Oct 2024: 0Nov 2024: 1Dec 2024: 62025Jan 2025: 2Feb 2025: 1Mar 2025: 0Apr 2025: 0May 2025: 0Jun 2025: 0Jul 2025: 2Aug 2025: 0Sep 2025: 1Oct 2025: 2Nov 2025: 0Dec 2025: 32026Jan 2026: 0Feb 2026: 0Mar 2026: 0Apr 2026: 1May 2026: 2Jun 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

0571132019: 2320192020: 11320202021: 2020212022: 520222023: 520232024: 1020242025: 1120252026: 32026

Event type and report source

Event type, as classified on the report

Death0.5%1
Injury89.5%170
Malfunction10%19
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%190
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 placed178.9%4.4%
Device slipped136.8%1.9%
Loosening of implant not related to bone-ingrowth63.2%0.6%
Unintended movement63.2%0.9%
Breakthe device broke52.6%26.4%
Device-device incompatibility21.1%4.1%
Migration or expulsion of device21.1%2.1%
Material deformation10.5%1%
Material twisted/bent10.5%1.4%

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
Failure of implant2814.7%
Painpain, site not specified2714.2%
Nonunion/delayed-union bone fracture2312.1%
Necrosisdeath of tissue168.4%
Injurya physical injury157.9%
Bone fracture(s)126.3%
Discomfortdiscomfort63.2%
Loss of range of motion52.6%
Nerve damage52.6%
Skin irritationirritated skin52.6%
Appropriate clinical signs, symptoms and conditions term/code not available42.1%
Impaired healingslow healing42.1%
Tissue damage31.6%
Arthritis21.1%
Hypersensitivity/allergic reaction21.1%

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

In context

MeasureUnk - Screws CannulatedProduct code HWCAll MAUDE reports
Reports19058,94626,136,888
Share of that pool—0.3%0%
Classified as death, per 1,000 reports519
Classified as injury89.5%67.2%36.2%
Classified as malfunction10%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 - 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 Cannulated reports

How many FDA reports name Unk - Screws Cannulated?

190 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 9 in the latest 12 months.

What kinds of events are reported?

injury (89.5%), malfunction (10%) and death (0.5%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

migration (8.9%), device slipped (6.8%), loosening of implant not related to bone-ingrowth (3.2%), unintended movement (3.2%) and break (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 Unk - Screws Cannulated 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.