Dentistry – Apparatus – Broach
Patent
1984-05-11
1986-09-02
Wilson, John J.
Dentistry
Apparatus
Broach
433165, 433224, A61C 502
Patent
active
046093524
ABSTRACT:
The present invention pertains to a rigid dental tool for carrying out the reaming and rectification of dental root canals and adapted to be operated either manually or through the use of dental hand held tools. The dental tool has two longitudinal portions with the first forming the attachment stem. The second is conical or cylindrical and extends from the first one through a frusto-conical connection piece. The second portion constitutes the working portion and is provided with cutting and/or reaming means; which may be of a uniform type over the whole working portion or may comprise more types successively distributed along the working portion. The first and second portions are centrally provided with an inner longitudinal cavity that houses a freely rotating flexible core which projects an appropriate extent from the free end of the second portion, as required by the operation.
REFERENCES:
patent: 2773501 (1956-12-01), Young
patent: 2878809 (1959-03-01), Treace
patent: 3295514 (1967-01-01), Hein
patent: 3534476 (1970-10-01), Winters
patent: 4190958 (1980-03-01), Martin
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