Electrically powered and heated endodontic syringe
US4684344A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1986 |
| Grant date | Aug 4, 1987 |
| Priority date | — |
| Expiry date | Apr 11, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C5/55
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An endodontic syringe for injecting thermoplastic material, such as gutta percha into a root canal cavity. The syringe includes a drive motor and mechanism for reversible axial translation of a plunger, a removable gutta percha cartridge and needle, and a heating element surrounding the cartridge to heat the gutta percha to a fluid condition. Forward movement of the plunger, against a piston within the cartridge, ejects gutta percha for the cartridge and needle. Reverse movement of the plunger returns it to its starting position, at which the used cartridge can be removed and replaced. The cartridge and needle are of aluminum or aluminum alloy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.