Devices › Handpiece, contra- and right-angle attachment, dental
Device brand name · Handpiece contra- and right-angle attachment dental
Nsk: medical device reports filed with FDA
795 reports name it, 2014–2026. Manufacturer given most often on reports: Nakanishi. Product code EGS.
- 795
- device reports naming the brand
- 0% of all MAUDE reports · about 65 a year
- 61
- reports, 12 months to August 2026
- 62 in the 12 months before
- 11.9%
- classified as malfunction
- 70.7% across the product code
- 0.1%
- classified as death, as reported
- 1 reports · not verified by FDA
FDA's MAUDE database holds 795 reports that name the brand "Nsk" (handpiece contra- and right-angle attachment dental), received between May 2014 and August 2026; the manufacturer given most often on reports is Nakanishi. Spellings of one product vary from report to report.
61 reports arrived in the 12 months to August 2026, close to the 62 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 (87.3%), malfunction (11.9%) and death (0.1%); across all handpiece, contra- and right-angle attachment, dental reports (product code EGS) death is recorded in 0% and malfunction in 70.7%. Event type is the reporter's classification of the report, not a verified outcome.
The device problems coded most often are overheating of device (74.2%), temperature problem (27.2%) and detachment of device or device component (13.8%). The patient problems coded most often are burn(s), injury and partial thickness (second degree) burn. 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
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
Event type and report source
Event type, as classified on the report
Who filed the report
Grey bar: all 2,636 reports carrying product code EGS. Event type is the filer's classification and is not verified by FDA.
Device problems coded
| Device problem (FDA code) | Reports | Share | Share across product code |
|---|---|---|---|
| Overheating of device | 590 | 74.2% | 58.9% |
| Temperature problem | 216 | 27.2% | 8.3% |
| Detachment of device or device componentpart of the device came off | 110 | 13.8% | 22.7% |
| Mechanical problema mechanical problem | 46 | 5.8% | 7.6% |
| Nonstandard device | 33 | 4.2% | 0% |
| Detachment of device component | 28 | 3.5% | 4.4% |
| Breakthe device broke | 27 | 3.4% | 0.8% |
| Insufficient device problem information | 22 | 2.8% | 1.9% |
| Device operates differently than expectedthe device behaved unexpectedly | 13 | 1.6% | 0.7% |
| Fracturea broken bone | 12 | 1.5% | 0% |
| Physical property issue | 11 | 1.4% | 0.5% |
| Unintended movement | 11 | 1.4% | 0.1% |
| Noise, audible | 10 | 1.3% | 0.4% |
| Component falling | 9 | 1.1% | 0.9% |
| Self-activation or keying | 8 | 1% | 0% |
| Device fell | 6 | 0.8% | 0% |
| Device handling problem | 6 | 0.8% | 2.2% |
| Device operational issue | 6 | 0.8% | 0% |
| Unintended electrical shock | 6 | 0.8% | 0% |
| Device slipped | 5 | 0.6% | 0.3% |
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) | Reports | Share |
|---|---|---|
| Burn(s)a burn | 439 | 55.2% |
| Injurya physical injury | 209 | 26.3% |
| Partial thickness (second degree) burn | 143 | 18% |
| Burn, thermal | 114 | 14.3% |
| Superficial (first degree) burn | 59 | 7.4% |
| Foreign body in patientpart of a device left in the patient | 48 | 6% |
| Full thickness (third degree) burn | 11 | 1.4% |
| Painpain, site not specified | 11 | 1.4% |
| No patient involvement | 10 | 1.3% |
| Swellingswelling | 8 | 1% |
| Burning sensationa burning feeling | 7 | 0.9% |
| Tissue damage | 7 | 0.9% |
| Skin tears | 6 | 0.8% |
| Laceration(s) | 5 | 0.6% |
| Tooth fracture | 5 | 0.6% |
Patient problem codes are present mainly in reports filed since 2019 and are often blank.
In context
| Measure | Nsk | Product code EGS | All MAUDE reports |
|---|---|---|---|
| Reports | 795 | 2,636 | 26,136,888 |
| Share of that pool | — | 30.2% | 0% |
| Classified as death, per 1,000 reports | 1 | 0 | 9 |
| Classified as injury | 87.3% | 28.9% | 36.2% |
| Classified as malfunction | 11.9% | 70.7% | 62.3% |
| Filed by the manufacturer | 89.2% | 89.8% | 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 EGS
| Brand | Reports | Latest 12 months | Classified as death |
|---|---|---|---|
| Midwest E High Speed Attachment 1 5 Hs Fo Ca | 619 | 0 | 0% |
| Vdw Gold/Silver Contra Angle | 152 | 0 | 0% |
| Gentlepower Lux Contra Angle 25lpa | 252 | 0 | 0% |
| Henry Schein | 215 | 43 | 0% |
| Reciproc Blue Files 6x Sterile | 523 | 42 | 0% |
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 Nsk reports
How many FDA reports name Nsk?
795 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 61 in the latest 12 months.
What kinds of events are reported?
injury (87.3%), malfunction (11.9%) and death (0.1%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.
What device problems are coded?
overheating of device (74.2%), temperature problem (27.2%), detachment of device or device component (13.8%), mechanical problem (5.8%) and nonstandard device (4.2%). These are FDA's device problem codes as entered on the report.
Who files these reports?
manufacturer reports (89.2%) and distributor reports (10.4%). Manufacturers and user facilities are required to report; voluntary reports come from health professionals and the public.
Do these reports show that Nsk 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.