Dental file
US11890155B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2021 |
| Grant date | Feb 6, 2024 |
| Priority date | — |
| Expiry date | Dec 23, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C2201/007
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Provided is a dental file exhibiting high performance and having high flexibility and excellent root canal followability. A dental file (10) of the present invention includes a working portion (11) in a spiral shape. An outer edge of the sectional shape of the working portion (11) at any position includes a single arc (40) and three or more lines (41, 42, 43). One end of the arc (40) forms a first cutting blade. The three or more lines (41, 42, 43) are positioned inside a virtual circle (50) partially including the arc (40). The length of the arc (40) may be equal to or greater than 1/12 and equal to or less than ⅓ of the circumferential length of the virtual circle (50), or a second cutting blade (16) may be further provided inside the virtual circle (50).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.