Method of removing a crown from a tooth
US4196520A · kind A · utility
2Cited by
1References
3Claims
0Family size
Inventor
Key dates
| Filing date | Mar 19, 1979 |
| Grant date | Apr 8, 1980 |
| Priority date | — |
| Expiry date | Mar 19, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C3/162
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Instead of prying the crown in the direction opposite to the direction in which it was forced onto its cooperating support tooth, the within crown-removal method calls for initially preparing the crown with a vertically oriented cleave, and then projecting crown-spreading members into the cleave so as to produce an enlargement thereof in its circumferential dimension, with the result that the crown is correspondingly expanded circumferentially and thus is readily disengaged from the tooth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.