Patent
1974-08-01
1976-04-13
Peshock, Robert
A61K 502
Patent
active
039494799
ABSTRACT:
An endodontic operating and sealing or obturating method and apparatus for performing the various steps of said method are disclosed. Means for preparing a root canal for filling are disclosed which include instruments for cleaning out the root canal and preparing the interior of the canal so that it includes a series of staged steps which grow progressively larger from the apical end of the tooth to the crown. Unique finishing instruments are provided with a cross-sectional configuration such that they will provide the progressively larger steps. Also disclosed is a method and apparatus for sealing the root canal thus prepared, which includes provision of the gutta percha cones of particular configuration adapted to substantially conform to the internal stepped configuration within the root canal. Also disclosed is a combination cone which in itself is composed of a series of cones having progressively increasing diameters so as to be capable of sealing a plurality of steps in the canal. Improved means for inserting the cones into the root canal and assuring complete sealing thereof are also provided.
REFERENCES:
patent: 1312120 (1919-08-01), Hurtt
patent: 1463963 (1923-08-01), Miller
patent: 3675329 (1972-07-01), Weissman
patent: 3855702 (1974-12-01), Malmin
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