Superelastic endodontic instrument, method of manufacture, and apparatus therefor
US6149501A · kind A · utility
41Cited by
13References
112Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1998 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Jan 27, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C2201/007
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A superelastic endodontic instrument, such as a file, is formed by grinding a superelastic wire to form a file preform or blank, and rotating a first end of the blank while preventing rotation of a second end of the blank. The file blank is maintained in the austenite phase at least until twisted to form a stress induced martensite which is plastically deformed by the twisting. A heat treatment step may be performed prior to twisting, during twisting or after twisting of the preform. The file blank may be heated by electrical heating methods or by submerging the blank in a heated liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.