Rotary handpiece for endodontic instruments

Details Rotary handpiece for endodontic instruments Rotary handpiece for endodontic instruments

1995-08-30

1996-12-24

Lucchesi, Nicholas D.

Dentistry

Method or material for testing, treating, restoring, or...

Endodontic

433102, 433114, A61C 502, A61C 110, A61C 300

Patent

active

055868860

ABSTRACT:
The present invention provides an improved rotary handpiece for cleaning and enlarging the root canal of a tooth with a rotary endodontic file. The handpiece includes a retractable support rod attached to and extending from the handpiece positioned adjacent and substantially parallel to the endodontic file. The support rod is adapted to rest on a tooth whereby the retraction of the support rod controls the advance of the endodontic file into the root canal. The control of the advance of the endodontic file insures that the file does not self thread into the canal or become excessively loaded whereby it sticks or breaks off while the root canal is being cleaned and enlarged.

REFERENCES:
patent: 1694857 (1928-12-01), Kulik
patent: 3578745 (1971-05-01), Garnier
patent: 3713221 (1973-01-01), Malmin
patent: 3969823 (1976-07-01), Nakanishi
patent: 4243388 (1981-01-01), Arai
patent: 4443193 (1984-04-01), Roane
patent: 4629426 (1986-12-01), Levy
patent: 4940410 (1990-07-01), Apap et al.
Nakanishi Dental Mfg. Co., Ltd. Clinical & Laboratory Rotary Cutting Instruments, pp. 4-9, printed in Australia, Dec. 21, 1993.

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