ENDODONTIC INSTRUMENT FOR DRILLING ROOT CANALS

摘要

The present invention relates to an endodontic instrument (20) for reaming root canals of a tooth. This instrument comprises a working zone (21) arranged to form and / or shape and / or cut the inner wall of the root canal. For this purpose it is provided with several flutes wound helically around a central axis, inside a conical casing (25) whose section tapers from one end (23) to the other end (26 ) of the instrument. This working area (21) is subdivided into adjacent segments (S) in which the flutes alternately have a straight sector and a helically twisted sector and are arranged such that their edges are located either on the conical casing (25). or inside this envelope at the level of the straight sectors and at the level of the twisted sectors.