Device for limiting the penetration of dental root canal instruments
US4217098A · kind A · utility
3Cited by
2References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 4, 1977 |
| Grant date | Aug 12, 1980 |
| Priority date | — |
| Expiry date | Apr 4, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C5/44
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A centrally-bored cylindrical abutment member is fitted over the shank of a root canal instrument and held against the instrument handle or head by elastic clipping means acting on the instrument handle, or on a handpiece carrying the instrument. The thickness of the abutment member may be adjustable, e.g. by screwing, or several interchangeable devices with abutment members of different thicknesses can be provided to accurately set the effective penetrable length of the instrument.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.