Superelastic endodontic instrument, method of manufacture, and a

Details Superelastic endodontic instrument, method of manufacture, and a Superelastic endodontic instrument, method of manufacture, and a

1998-01-27

2000-11-21

Banks, Derris H.

Abrading

Abrading process

Drill, thread, thread cutter, reamer, or rotary cutter abrading

451540, B24B 100

Patent

active

061495018

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.

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Harmeet Walia et al., An Initial Investigation of the Bending and Torsional Properties of Nitinol Root Canal Files, Journal of Endodontics, vol. 14, No. 7, Jul. 1988.

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