FR2547718A1 - Widening of the dental canals with the aid of an assembly of metal wires - Google Patents

Abstract

The invention relates to an instrument intended for widening the dental canals. It comprises a handle 1 supporting a bundle of metal wires 2 wound in helical formation around a central metal wire 3.

Description

D ESCRIP TION
The widening of a dental canal aims: - to regularize its walls, - to remove tissue from us, irritating necrotic debris or
septic s, - the easy introduction of various materials and products, - the obturation of the canal which is the goal of the operation.

 As the dental canals are rarely rectilinear, previous techniques using single-stranded instruments (drills, nerve pulls5, pins, files, etc.) did not allow the curves to be crossed as soon as the instrument became larger in diameter, therefore more rigid.

 The invention replaces the reamer with a single metal strand, an a = evening whose active part for a third diameter consists of several metal strands: each metal strand of this instrument keeps its own flexibility and allows the assembly to work under the same conditions, Thus, with an equal diameter, an instrument with several metallic strands could progress in a curve while a more rigid instrument would be stopped there.

 According to one embodiment, the device represented in FIG. 1 comprises a handle (1) carrying in its extension a bundle of metallic wires of triangular section (2) wound in a helix around a metallic wire of round and decreasing section from the handle towards the end of the instrument. These metal wires have a base applied to the round metal wire and therefore having an external cutting angle (3) ç The central metal wire is terrined by a rounded end which slightly exceeds the end of the triangular metal wires which circumscribe it ( 4).

 The metal strands may be all or in part integral with the handle and they may for example be twisted and / or braided.

 According to a nonlimiting example, the peripheral metal wires will be integral with the handle while the central wire will slide in the latter.

According to another variant, only the central wire will be integral with the
DESCRIPTION planks the peripheral wires can then slide into the latter = deny.

 According to a particular embodiment, the metal wires are secured to one another over a part of their length, their end remaining free, only the peripheral metal wires being secured to the handle, while the central wire can slide in the latter.

 According to another embodiment, the metal wires located on the side of the handle and the end will be joined over a certain length, either by bonding or by welding or by soldering, while in the intermediate part the metal wires are active. will remain free.

 One can reasonably think that in Wandering a million teeth are devitalized each year9 requiring the use of instruments intended to widen their channels.

Claims (1)

 l) -instrument intended to widen the dental canals in order to obtain them =  rer, characterized in that its active part is constituted by plu =  several metallic wires.  2) -instrument according to claim 1 characterized in that it comprises =  a handle (1) carrying in its extension a bundle of wires  metallic triangular section (2) wound in a helix around a  metallic wire of round and decreasing section from the handle to the ex =  end of the instrument, the central wire ending in  a rounded end which slightly exceeds the end of the wires  triangular metal which circumscribe it (4). 3) -According to claim 1 the metal son are twisted. 4) -According to claim 1 the metal son are braided.  5) -According to claims 2 and 3 the metal wires have  cutting angles. 6) -According to claims 1, 2r, 3, the metal wires are all so =  lidaries of the handle. 7) -According to claims 1, 2, 30 the peripheral metal wires  are integral with the handle, the central wire being able to slide in ce = luiwci. 8) -According to claims 112, 3, only the central wire is integral  of the handle, the peripheral wires being able to slide therein. 9) -According to claims 1> 2, 3, the metal wires are soli  each other over part of their length, only  the peripheral metal wires are secured to the handle on  central wire which can slide in the handle. 10) -According to claims 1,2, 3, the metallic wires located on the side:  te of the handle and the end will be joined on a certain  length, either by gluing, or by welding, or by brazing, then  that in the intermediate part activates the metallic wires:  will be free.