Endodontic dental instrument

Details Endodontic dental instrument Endodontic dental instrument

1996-03-07

1998-06-09

O'Connor, Cary E.

Dentistry

Apparatus

Broach

A61C 502

Patent

active

057624976

ABSTRACT:
An endodontic instrument which comprises an elongate shank which has a tapered working length adjacent the pilot end, and at least one continuous helical flute formed along the tapered working length so as to define sharp cutting edges along the sides of the flutes. Also, at least one relief, in the form of a flat surface, extends axially along a substantial portion of the length of the working length, which acts to reduce the tendency of the tapered working length to screw into and crack the tooth during manipulation thereof by the dentist in the course of root canal therapy.

REFERENCES:
patent: 4836780 (1989-06-01), Buchanan
patent: 4934934 (1990-06-01), Arpaio, Jr. et al.
patent: 5106298 (1992-04-01), Heath et al.
patent: 5387059 (1995-02-01), Borzemsky
patent: 5464362 (1995-11-01), Heath et al.

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