Dental bur
US4897037A · kind A · utility
11Cited by
6References
12Claims
0Family size
Inventor
Key dates
| Filing date | Dec 8, 1988 |
| Grant date | Jan 30, 1990 |
| Priority date | — |
| Expiry date | Dec 8, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S40/913
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A dental bur includes a shank adapted to be held by a dental drill and an abrasive portion. The lowermost abrasive portion at the free end of the bur is of a different color from the remaining abrasive portion. As a result, a dentist can observe the colored section to determine the depth of the bur tip under the gum line. Preferably, the bur is formed by coloring the corresponding section of the substrate from which the bur is made and then coating the entire working surface of the bur (colored and uncolored) with diamond chips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.