FR2466236A1

FR2466236A1 - Irrigation of tooth root canal during drilling - uses tube in handpiece housing to produce jet of irrigating liq. in direction parallel to axis of drill bit

Info

Publication number: FR2466236A1
Application number: FR7924778A
Authority: FR
Inventors: Marcel Garnier
Original assignee: Micro Mega SA
Current assignee: Micro Mega SA
Priority date: 1979-09-28
Filing date: 1979-09-28
Publication date: 1981-04-10
Also published as: FR2466236B1

Abstract

The dental handpiece has a bit at the distal end which is in communication with a tube connected to a fluid supply. This produces a jet of irrigating liq. whose axis is parallel to that of the drill bit. The jet of liq. removes tooth fragments as they are formed during the drilling operation. In order to bring the axis of the jet as near as possible to that of the drilling bit, part of the bearing in which the bit is mounted may be removed. The supply of liq. is controlled to operate simultaneously with the rotation of the bit.

Description

La présente invention a pour objet un perfection- nement apporte aux procédées pour l'alésage mécanique des canaux radiculaires des dents en traitement ainsi qu'un dispositif pour la mise en oeuvre dudit procédé. The subject of the present invention is an improvement to the processes for the mechanical boring of the root canals of the teeth under treatment as well as a device for the implementation of said process.

On connait déjà des procédés de ce type pour l'alé- sage des canaux radicilaires, c'est-à-dire l'enlèvement de matière, en l'occurence de la dentine, par exemple celui décrit dans le brevet français FR 1 397 366 au nom de la demanderesse. De multiples autres procédés de ce type sont mis en oeuvre quotidienne met par le dentiste. Processes of this type are already known for boring the root canals, that is to say removing material, in this case dentine, for example that described in French patent FR 1 397 366 in the name of the plaintiff. Many other procedures of this type are implemented daily by the dentist.

Dans toutes ces opérations, il y a grattage de la paroi du canal, ce qui a pour conséquence un émiettement de la dentine. Traditionnellement l'enlévement de la dentine émiettée se fait par irrigation au moyen d'un jet d'eau ou de sérum provenant d'un flexible comportant un tube d'amenée du liquide et un dispositif de commande. Il est donc nécessaire pour le dentiste, successivement dc retirer son instrument de ia bouche du patient, de le poser, de prendre le flexible d'amenée de liquide d'irrigation, de nettoyer la dent en traitement, puis enfin de reprendre l'ins- trunten-t à main et de reprendre l'opération dlalesage. In all these operations, there is scraping of the wall of the canal, which results in crumbling of the dentin. Traditionally the removal of crumbled dentin is done by irrigation by means of a jet of water or serum from a hose comprising a tube for supplying the liquid and a control device. It is therefore necessary for the dentist, successively to remove his instrument from the patient's mouth, to put it down, to take the hose for supplying irrigation liquid, to clean the tooth under treatment, then finally to resume insertion. - hand trunten and resume the dlalesage operation.

L'invention a pour objet de pallier ces inconvé- nients en proposant un procédé pour l'alésage mécanique des canaux radiculaires des dents en traitement, caractérisé en ce que l'opération d ' irrigation est opérée pendant le grattage. The object of the invention is to overcome these drawbacks by proposing a method for the mechanical boring of the root canals of the teeth under treatment, characterized in that the irrigation operation is carried out during scraping.

Pour mettre en oeuvre ce procédé, on propose également selon l'invention une tête d'instrument à main munie d'un tube d'amende de liquide d'irrigation. To implement this method, there is also proposed according to the invention a hand instrument head provided with a fine tube of irrigation liquid.

Il faut en outre que le liquide soit projeté sensib3ement parallèlement à l'alésoir porté par la tête de la pièce à main, de manière à ce que le liquide d'irrigation pénètre facilement dans le canal en mêe temps que l'alésoir et puisse donc en ressortir charge de déchets à évacuer. En effet un alésoir a une longueur d'environ 3 cm et le diamètre d'un canal est de llor- dre de grandeur du dixième de millimètre. Le tube d'amenée étant fixé à la tête de la pièce à main, il faut donc
- que le jet soit dirigé sensiblement parallèlement à l'alésoir ;
- que la direction soit précise
- que l'axe du jet soit le plus rapproché possible de celui de l'alésoir. It is also necessary that the liquid is projected sensit3 parallel to the reamer carried by the head of the handpiece, so that the irrigation liquid easily penetrates into the channel at the same time as the reamer and can therefore come out load of waste to be removed. In fact, a reamer has a length of around 3 cm and the diameter of a channel is about one tenth of a millimeter in size. The supply tube being fixed to the head of the handpiece, it is therefore necessary
- that the jet is directed substantially parallel to the reamer;
- that the direction is precise
- that the axis of the jet is as close as possible to that of the reamer.

L'obtention d'un jet sensiblement parallèle à l'aalésoir ne pose en soi aucun problème. Obtaining a jet substantially parallel to the reamer in itself poses no problem.

Pour que la direction du jet soit précise, on prévoiera selon l'invention que le tube sera soudé à la tête de la pièce à main ou fixé sur celle-ci selon tout dispositif équivalent. In order for the direction of the jet to be precise, it will be provided according to the invention that the tube will be welded to the head of the handpiece or fixed to it according to any equivalent device.

Enfin pour que l'axe du jet soit le plus rapproché possible de celui de l'alésoir , on pourra dégager partiellement le coussinet dans lequel est logé l'alésoir. Finally, so that the axis of the jet is as close as possible to that of the reamer, we can partially release the bearing in which the reamer is housed.

Selon un autre mode de réalisation on peut également prévoir que le tube d'amenée de liquide d'irrigation sera intérieur à la tête de la pièce à main, ce qui permet d'éviter en outre tout risque d'arrachement inopiné du tube d'amenée du liquide d'irrigation. According to another embodiment, it is also possible to provide that the tube for supplying irrigation liquid will be inside the head of the handpiece, which also makes it possible to avoid any risk of unexpected tearing of the tube. brought in irrigation liquid.

De manière préférentielle l'irrigation sera commandée en même temps que la rotation de l'alésoir, mais on peut également prévoir un dispositif séparé de commande permettant si l'utilisateur le désire de ne pas utiliser l'irrigation ou de ne l'utiliser que de manière intermittente. Preferably the irrigation will be controlled at the same time as the rotation of the reamer, but one can also provide a separate control device allowing if the user wishes not to use the irrigation or to use it only intermittently.

On comprendra mieux l'invention à l'aide de la description ci-après d'un mode de réalisation préféré de l'invention et des dessins annexés dans lesquels
- la figure 1 est une vue de côté d'une pièce a main munie d'un tube d' irrigation conformément à l'invention
- la figure 2 est une vue de dessous de la pièce à main de la figure 1.The invention will be better understood on the basis of the following description of a preferred embodiment of the invention and the accompanying drawings in which
- Figure 1 is a side view of a handpiece provided with an irrigation tube according to the invention
- Figure 2 is a bottom view of the handpiece of Figure 1.

Dans la tête 1 d'une pièce à main 2 est logé un alésoir 3, rapporté dans le corps ae la tête, en pratique visse ou chassé. In the head 1 of a handpiece 2 is housed a reamer 3, attached in the body to the head, in practice screwed or driven.

Sur la tête 1 on fixe, par exemple par soudure par points ou continue un tube d'amenée de liquide d'irrigation 4. A ce tube est relié n flexible d'alimentation 5 relié lui-même à la source de liquide, non représentée ici. On the head 1, an irrigation liquid supply tube 4 is fixed, for example by spot welding or continues. To this tube is connected n supply hose 5 itself connected to the source of liquid, not shown. here.

De manière à ce que l'axe du jet issu du tube d'amenée soit le plus près possible de celui de l'alésoir, on menagera sur le coussinet 6 dans lequel est logé l'alésoir un déâe- ment So that the axis of the jet coming from the feed tube is as close as possible to that of the reamer, there will be formed on the bearing 6 in which the reamer is housed an offset.

Claims

1. Process for the mechanical boring of the radicu channels

teeth teeth in treatment in which the tooth fragments

bored must be evacuated by an irrigation liquid, character

laughed in that the irrigation operation is operated during the grat

floor.

2. Handpiece for mechanical boring of channels

roots of the teeth being treated, in which a reamer is

fixed in the head of said handpiece, characterized in that the head is provided with an irrigation liquid supply tube making it possible to obtain a jet of irrigation liquid whose axis is substantially parallel to that of the reamer.

3. Handpiece according to claim 2, characterized in that the irrigation liquid supply tube is welded on the head of the handpiece.

4. Handpiece according to any one of claims 2 and 3, characterized in that to position the irrigation liquid supply tube as close as possible to the reamer partially releases the pad in which is housed l reamer.

5. Handpiece according to claim 2, characterized in that the irrigation liquid supply tube is internal to the handpiece.

6. Handpiece according to any one of claims 2 to 5, characterized in that the irrigation is operated systematically with the rotation of the reamer.

7. Handpiece according to any one of claims 2 to 5, characterized in that it is provided with control means allowing the user to operate the irrigation intermittently1