Apparatus for filling tooth root canals under vacuum
US5295828A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1992 |
| Grant date | Mar 22, 1994 |
| Priority date | — |
| Expiry date | Oct 1, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C5/55
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The apparatus comprises a filling nozzle having a conical part so that it can fit in a leaktight manner on to a burred aperture in a tooth to be filled. The nozzle has a suction tube and a first annular channel connected to the suction tube and coming out into the dental cavity in order to create a vacuum therein. A second central channel serves to bring a filling paste from a reservoir to the dental cavity. The cross-section of flow of the first channel is several times smaller than that of the second channel, so that the paste travels much more slowly in the first channel than in the second, under the effect of the partial vacuum in the dental cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.