Method of manufacturing superelastic endodontic files and files

Details Method of manufacturing superelastic endodontic files and files Method of manufacturing superelastic endodontic files and files

1997-09-26

1999-11-16

Lucchesi, Nicholas D.

Dentistry

Apparatus

Broach

A61C 504

Patent

active

059846798

ABSTRACT:
A method of forming a superelastic endodontic file by grinding a superelastic wire to form a file blank, and rotating a first end of the blank while preventing rotation of a second end of the blank is disclosed. The file blank is maintained in the austenite phase 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 method disclosed allows for increased flexibility in the design of files including the production of a rhomboid superelastic file.

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Harmeet Walia, et al., An Intial 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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