FR2867377A1

FR2867377A1 - A support for the simultaneous positioning of a number of orthodontic attachments comprises an incorporated thread which may be pulled to cut the support and facilitate its removal

Info

Publication number: FR2867377A1
Application number: FR0402574A
Authority: FR
Inventors: Vetea Miklus
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-03-11
Filing date: 2004-03-11
Publication date: 2005-09-16

Abstract

A support for orthodontic attachments designed to be glued by simultaneous transfer onto a dental arcade in the upper or lower jaw of a patient comprising a thread to facilitate its removal. The support is molded in a polymerizable material along a cast of the arcade onto which the attachments have been placed and is then removed from the cast and applied to the teeth for the gluing stage. While the support is on the cast, a thread is applied running longitudinally near to the attachments and incorporated into the support in such a way that, after the support has been placed onto the teeth and the attachments glued, the support may be cut longitudinally by pulling on the thread to facilitate its removal. The support may be global and designed to apply to both dental arcades simultaneously.

Description

SUPPORT POUR ATTACHES D'ORTHODONTIE DESTINEES A ETRE COLLEES,SUPPORT FOR ORTHODONTIC ATTACHES INTENDED FOR BONDING,

PAR TRANSFERT ET SIMULTANEMENT, SUR DES DENTS D'UN PATIENT BY TRANSFER AND SIMULTANEOUSLY, ON TEETH OF A PATIENT

DESCRIPTIONDESCRIPTION

DOMAINE DE L'INVENTION L'invention concerne un procédé de découpe d'un support d'attaches d'orthodontie destinées à être collées, par transfert et simultanément, sur des dents appartenant à une arcade dentaire maxillaire et/ou mandibulaire de la mâchoire d'un patient. FIELD OF THE INVENTION The invention relates to a method of cutting a support of orthodontic fasteners intended to be glued, by transfer and simultaneously, to teeth belonging to a maxillary and / or mandibular dental arch of the jaw. 'a patient.

L'invention concerne également le support pour la mise en oeuvre dudit procédé. ARRIERE PLAN TECHNOLOGIQUE Dans la pratique courante: - le support en question est généralement obtenu au moyen d'un matériau déformable, polymérisable, plaqué le long du duplicata de l'arcade concernée de manière à recouvrir les attaches d'orthodontie qui sont préalablement positionnées sur chaque face vestibulaire et/ou linguale des dents du duplicata correspondant aux dents concernées du patient; l'ensemble comprenant le support et les attaches est ensuite désolidarisé du duplicata pour être positionné sur les dents du patient afin d'effectuer l'opération proprement dite de collage; - le support est enfin retiré de la bouche du patient une fois les attaches collées. Dans le cas de l'utilisation d'un adhésif photopolymérisable, le support en question intègre, outre les attaches d'orthodontie, des moyens d'éclairage simultané des masses d'adhésif. The invention also relates to the support for implementing said method. BACKGROUND TECHNOLOGY In current practice: the support in question is generally obtained by means of a deformable, polymerizable material, plated along the duplicate of the arcade concerned so as to cover the orthodontic fasteners which are previously positioned on each vestibular and / or lingual surface of the teeth of the duplicate corresponding to the relevant teeth of the patient; the assembly comprising the support and the fasteners is then detached from the duplicate to be positioned on the teeth of the patient to perform the actual bonding operation; - The support is finally removed from the patient's mouth once the fasteners are glued. In the case of the use of a photopolymerizable adhesive, the support in question integrates, in addition to the orthodontic fasteners, means for simultaneously lighting the masses of adhesive.

La technique du collage indirect au moyen d'un support réalisé en matériau polymérisable et d'un adhésif photopolymérisable est essentiellement décrite dans le brevet US3949477. The technique of indirect bonding by means of a support made of polymerizable material and a photopolymerizable adhesive is essentially described in patent US3949477.

Les principaux avantages qui découlent de cette technique sont les suivants: - facilité de mise en oeuvre et d'utilisation - rapidité et précision du collage en bouche; - globalement économique. The main advantages that flow from this technique are the following: - ease of implementation and use - speed and precision of the gluing in the mouth; - overall economic.

Malheureusement, la pratique d'une telle technique a mis en évidence un inconvénient majeur lié à la difficulté du dégagement du support une fois les attaches collées. Unfortunately, the practice of such a technique has highlighted a major drawback related to the difficulty of the release of the support once the fasteners glued.

En effet, celles-ci étant noyées dans la masse du support, le retrait de celui-ci ne peut se faire que de deux façons: - la première en opérant plusieurs découpes du matériau au moyen d'un instrument tranchant tel qu'un bistouri; - la deuxième en tentant de retirer l'intégralité du matériau de manière monobloc. Indeed, these being embedded in the mass of the support, the withdrawal of it can be done in two ways: - the first by making several cuts of the material by means of a cutting instrument such as a scalpel ; - the second, trying to remove the entire material in one piece.

La première solution présente un danger potentiel pour le patient car le praticien effectue des gestes de découpe à l'aveugle sans aucun repère anatomique (repères recouverts par le matériau en question). Ainsi celuici risque à tout moment de découper tout ou partie des tissus dentaires sous jacents. The first solution presents a potential danger for the patient because the practitioner performs blind cutting gestures without any anatomical reference (marks covered by the material in question). Thus it is possible at any time to cut all or part of the underlying dental tissues.

La seconde solution provoque, au moment du retrait du matériau, des forces iatrogènes dans les masses d'adhésifs en cours de polymérisation et notamment des forces de cisaillement. Ces forces exercées durant les phases de collage auront des répercutions cliniques qui se manifesteront quelques jours plus tard par une diminution des valeurs d'adhésion des attaches orthodontiques. The second solution causes, at the time of removal of the material, iatrogenic forces in the adhesive masses during polymerization and in particular shear forces. These forces exerted during the gluing phases will have clinical repercussions that will manifest a few days later by a decrease in the adhesion values of the orthodontic brackets.

Au final, cette opération se révèle être peu aisée, fastidieuse et dangereuse. Elle peut se retrouvée potentialisée dans le cas de l'utilisation de moyens d'éclairage (risque de sectionnement des fibres optiques par exemple). In the end, this operation turns out to be not easy, tedious and dangerous. It can be found potentiated in the case of the use of lighting means (risk of cutting optical fibers for example).

L'invention vise donc à réaliser un procédé de découpe du support d'attaches d'orthodontie, simple, rapide et performant. The invention therefore aims to achieve a method of cutting orthodontic bracket support, simple, fast and efficient.

Claims

SUMMARY OF THE INVENTION The cutting method according to the invention is characterized in that it consists in placing, along the duplicate of the dental arch, near the orthodontic fasteners, at least one wire positioned so as to also be covered by the material constituting the support and allow, after the operation of gluing in the mouth of said fasteners, the cutting of the longitudinal wall of said support by a tearing action exerted on said wire. The thus cut support is easily removed since it has a longitudinal opening over the entire thickness of the material that composes it. It thus integrates, once made on the duplicate of the arcade concerned, the fasteners, the masses of adhesive and at least one cutting wire of said material. In the case of the use of a photopolymerizable adhesive, the support also incorporates, in addition, lighting means positioned and adapted to simultaneously illuminate, in the mouth, the masses of adhesive. PRESENTATION OF THE FIGURES The characteristics and advantages of the invention will appear more clearly on reading the detailed description which follows of a preferred embodiment thereof given by way of non-limiting example and shown in the accompanying drawings. In these drawings: - Figure 1 is a cross sectional view AA of the arch, at a tooth, showing the position of an orthodontic attachment and the cutting wire in the mass of the support: this view can be used both for a support engaged with the duplicate of the arch (support in progress), as for a support engaged with the arch of the patient (fasteners being glued); - Figure 2 is an inner view, according to the arrow (F), showing the position of a plurality of fasteners and the cutting wire in the mass of the support; in both figures, the support has been shown transparent for practical reasons. DETAILED DESCRIPTION OF THE INVENTION The support (1) orthodontic fasteners (2), shown in the figures, is intended to simultaneously bond said fasteners on teeth (3) belonging to a maxillary and / or mandibular dental arch of the jaw of a patient. Said support is generally made by means of a deformable material (1), polymerizable, plated along the duplicate of the arcade concerned so as to cover said fasteners which are previously positioned on each vestibular and / or lingual face of the teeth concerned. duplicate. The assembly comprising the support (1) and the fasteners (2) is then detached from the duplicate to be positioned on the teeth (3) of the patient in order to perform the actual bonding operation. The support (1) is finally removed from the patient's mouth once the fasteners are glued; The method of cutting the support (1) consists in placing, along the duplicate of the dental arch, near the fasteners (2), at least one wire (4) positioned so as to be covered by the material constituting said support and allow, after the operation of gluing in the mouth of said fasteners, the cutting of the longitudinal wall of said support by a pulling action (F) exerted on said wire, the cutting of the support being effected along the axis ( D). The support in question therefore consists of the polymerizable material (1) which integrates the fasteners (2) and at least one wire (4) for cutting said material. The major advantages of such a device are manifested on several levels: - The cutting safety of the material is ensured by avoiding the operator the use of cutting instruments, with the potential risks that arise when they are handled. - The cutting of the material is performed with great precision, juxtaocclusal position relative to the fasteners, and provides two very distinct parts: .. the largest part, corresponding to the material not coming into contact with the different orthodontic brackets facing the lingual and occlusal walls (as shown in Figure 1), can be removed without the risk of exerting any force on the newly bonded fasteners; the other part, corresponding to the least bulky part of the material in contact with the fasteners, can be removed without exerting any shear force on the orthodontic devices. The speed of execution, both at the time of positioning and at the time of removal of the support, offers more comfort for the patient and for the care team. In the case of the use of a photopolymerizable adhesive, the material (1) incorporates, in addition, lighting means positioned and adapted to simultaneously illuminate, in the mouth, the adhesive masses. The illumination means may be selected from optical fibers, liquid waveguides, rigid waveguides provided with light-reflecting elements, and polymer-based waveguides. The terminations of the lighting means may be chosen from: a mass of polymerizable transluminescent elastomer covering each fastener (2), the material (1) being, in this case, an opaque and reflective elastomer; a transluminescent capsule intended to fit on each fastener (2), the material (1) being, in this case, an opaque and reflective elastomer; - The fastener (2) itself which comprises a terminal for fixing the lighting means and whose wall in contact with the adhesive is transluminescent. The support may consist of a global support intended to bond, simultaneously, the two dental arches of the same patient. Of course, the invention is not limited to the described and illustrated embodiments for which other variants may be provided, in particular in: - the types of orthodontic fasteners and materials used as support for fasteners ; - the types of lighting means in the case of the use of photopolymerizable adhesives; - their number, their position and the way of arranging them together; and extend it to other applications of simultaneous bonding of specific elements on the faces of the teeth.

6 claims

1-support (1) of orthodontic brackets (2) intended to be stuck, by transfer and simultaneously, on teeth (3) belonging to a maxillary and / or mandibular dental arch of the jaw of a patient; said support being generally made by means of a deformable material (1), polymerizable, plated along the duplicate of the arcade concerned so as to cover said fasteners which are previously positioned on each buccal and / or lingual face of the teeth concerned of the duplicate; the assembly comprising the support (1) and the fasteners (2) then being detached from the duplicate to be positioned on the teeth (3) of the patient in order to perform the actual bonding operation; characterized in that it comprises, along the duplicate of the dental arch, near the fasteners (2), at least one wire (4) positioned so as to be covered by the material constituting the support (1) and to allow, after the sticking operation in the mouth of said fasteners, the cutting of the longitudinal wall of said support by a pulling action (F) exerted on said wire.

2. Support according to claim 1, characterized in that, in the case of the use of a photopolymerizable adhesive, the polymerizable material (1) incorporates, in addition, lighting means positioned and adapted to illuminate simultaneously, in the mouth, the masses of adhesive.

3- support according to claim 2, characterized in that the illumination means are selected from optical fibers, liquid waveguides, rigid waveguides provided with elements reflecting the light rays, light guides, waves based on polymers.

4- Support according to claim 3, characterized in that the endings of the lighting means consist of a polymerizable transluminescent elastomer mass covering each fastener (2), the material (1) being, in this case, an opaque elastomer and reflective.

5. Support according to claim 3, characterized in that the endings of the illumination means consist of a transluminescent capsule intended to fit on each fastener (2), the material (1) being, in this case, an opaque elastomer and reflective.

6- Support, according to claim 3, characterized in that the terminations of the lighting means consist of the fastener (2) itself which comprises a terminal for fixing the lighting means and whose wall in contact with the adhesive is transluminescent.

7- support, according to any one of claims 1 to 6, characterized in that it consists of a global support for bonding, simultaneously, the two dental arches of the same patient.