Four sided root canal rasp for root canal preparation
US4661061A · kind A · utility
23Cited by
3References
14Claims
0Family size
Inventor
Key dates
| Filing date | Jul 22, 1985 |
| Grant date | Apr 28, 1987 |
| Priority date | — |
| Expiry date | Jul 22, 2005 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C5/42
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention concerns a dental instrument for performing root canal work. An end portion, integrally connected to the instrument shaft, is provided with four faces of like size, shape and orientation. The four faces are joined to one another by curved, continuous edges. Thus, the end portion has a square cross-section, provided so canal walls can be rasped at four points while leaving the walls of the canal smooth. Because the face edges meet at one point, a separate tip element is not necessary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.