Endodontic dental instrument
US5762497A · kind A · utility
31Cited by
5References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1996 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Mar 7, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C5/42
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An endodontic instrument which comprises an elongate shank which has a tapered working length adjacent the pilot end, and at least one continuous helical flute formed along the tapered working length so as to define sharp cutting edges along the sides of the flutes. Also, at least one relief, in the form of a flat surface, extends axially along a substantial portion of the length of the working length, which acts to reduce the tendency of the tapered working length to screw into and crack the tooth during manipulation thereof by the dentist in the course of root canal therapy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.