Method and material for obturating an extirpated root canal
US5275562A · kind A · utility
Inventor
Key dates
| Filing date | Jan 27, 1992 |
| Grant date | Jan 4, 1994 |
| Priority date | — |
| Expiry date | Jan 27, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C5/55
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method of obturating an extirpated root canal and an associated filler material utilizes two classes of gutta-percha, one class of which becomes plasticized at a predetermined temperature and the other class of which becomes plasticized at a temperature which is less than the predetermined temperature. In one embodiment of the method, the second class of gutta-percha is coated about the first class when in a plasticized condition, and in another embodiment of the method, the second class is pre-coated about the first class and the second class is heated to plasticized condition without plasticizing the first class. In either case, the first class of gutta-percha supports the plasticized second class when subsequently introduced into a root canal for filling the canal. To increase the rigidity of the first class of gutta-percha, the first class may be coated with a cured layer of methyl methacrylate before the second class of gutta-percha is coated about the first class. Following introduction of the two classes of gutta-percha into the canal, the classes may be condensed within the root canal system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.