FR2561518A1

FR2561518A1 - Device for improving the making of dental prostheses

Info

Publication number: FR2561518A1
Application number: FR8404422A
Authority: FR
Original assignee: Individual
Current assignee: Individual
Priority date: 1984-03-20
Filing date: 1984-03-20
Publication date: 1985-09-27
Also published as: FR2561518B1

Abstract

The present invention relates to a device allowing characteristic positive reproduction of a clinical situation to be obtained from an initial mould 1, made in general in the mouth of the patient. The device comprises: an articulated unit A, composed of two arms each receiving a matrix M on which a removable disposable mould J is adjusted, covering the casting of plaster laid down in the initial mould I. The mould J becomes attached to the reproduction R when the plaster has set. All work for making the prosthesis (trimming, cutting, adjusting, etc.) is made easier by the possibility of detaching the mould J and the matrix M. Conversely, the possibility of always accurately adjusting these two parts, by returning them to their initial positions, allows control of the making of the prosthesis and allows it to be ensured that the latter corresponds point by point to the initial moulding I.

Description

DESCRIPTION
Ce dispositif est destiné à simplifier le mode opératoire usuel, et à réduire le temps d'exécution lors ds la realisa- tion de la reproduction R d'une empreinte dentaire et à garan- tir un haut degré de prficision lors de l'élaboration de la prothèse.DESCRIPTION
This device is intended to simplify the usual operating mode, and to reduce the execution time when carrying out the reproduction R of a dental impression and to guarantee a high degree of precision during the preparation of the prosthesis.

Ce dispositif comprend 3 éléments - Un ensemble articulé A - Une matrice M - Un moule jetable J
L' ensemble articulé A
Il comprend deux bras à double JranbcXhes, dont les formes générales reproduisent schématiquement l'articulation de la machoire (fig 1, 2, 3).This device comprises 3 elements - An articulated assembly A - A matrix M - A disposable mold J
The articulated assembly A
It includes two double JranbcXhes arms, the general shapes of which schematically reproduce the articulation of the jaw (fig 1, 2, 3).

Les deux bras peuvent se désolidariser, grce à une lame de ressort R, fixe sur chacun des deux bras A1. Cette obstruction de l'axe d'articulation par une lame de ressort permet, outre la désolidarisation des deux bras , de faire jouer lat6- ralement les bras l'un par rapport à l'autre (flêche L, fig 3) de manière à reproduire les mouvements latXrauxNde la machoire.The two arms can separate, thanks to a leaf spring R, fixed on each of the two arms A1. This obstruction of the articulation axis by a spring leaf allows, in addition to the separation of the two arms, to make the arms play sideways with respect to each other (arrow L, fig 3) so as to reproduce the lateral movements of the jaw.

Une vis de réglage sur l'un des bras permet, en prenant appui sur le bras opposé de faire varier la fermeture selon l'angle U (fig 1).An adjustment screw on one of the arms allows, by resting on the opposite arm, to vary the closure according to the angle U (fig 1).

Chaque bras comporte un épaulement de positionnement B, qui détermine l'exacte mise en place de la matrice M.Each arm has a positioning shoulder B, which determines the exact placement of the matrix M.

Les embouts de chaque bras sont en légère dépouille pour faciliter le glissement de la matrice M.The tips of each arm are slightly undercut to facilitate the sliding of the matrix M.

Un clip C de maintien, fixe la matrice M lorsque celle-ci est mise en place.A retaining clip C fixes the matrix M when it is in place.

La matrice M
La matrice M assure la liaison entre l'ensemble articulé A et le moule jetable J. Sa forme générale reproduit approximativement celle de la machoire.The matrix M
The matrix M provides the connection between the articulated assembly A and the disposable mold J. Its general shape roughly reproduces that of the jaw.

Elle comporte aux 2 extrémités un logement L, ayant la m8me forme que les embouts de bras de l'ensemble articulé, afin que la matrice M et l'ensemble A s'ajustent parfaitement, le clip C1 s'enclenchent dans le logement C2, prévu sur la matrice, lorsque la mise en place définitivs des deux pièces est réalisée.It has at the 2 ends a housing L, having the same shape as the end caps of the articulated assembly, so that the matrix M and the assembly A fit perfectly, the clip C1 snaps into the housing C2, provided on the matrix, when the definitive positioning of the two parts is carried out.

Les caractéristiques E, F, D et G, F1, F2, représentées sur la vue en coupe aa fig 8, sont destinées à assurer, lors de l'exécution des travaux de prothèse, une remise en place parfaite et précise du moule J après chaque manipulation. Ces caractéristiques sont développées au paragraphe suivant.The characteristics E, F, D and G, F1, F2, represented in the sectional view aa fig 8, are intended to ensure, during the execution of the prosthesis work, a perfect and precise replacement of the mold J after each manipulation. These characteristics are developed in the following paragraph.

Pour répondre aux variations de forme de machoires que l'on peut constater entre chaque individu la matrice est réalisée selon le principe ci-après (fig 10) : ra - Une embrase invariable N dans laquelle viennent se loger les deux embouts de bras articulé. To respond to variations in the shape of jaws that can be seen between each individual, the matrix is produced according to the following principle (fig 10): ra - An invariable base N in which are housed the two ends of the articulated arm.

- Une partie supérieure pouvant avoir l'un des 3 types de formes, à savoir : petite, moyenne et grande, de manière à rFpon- dre à toutes situations cliniques.- An upper part which can have one of the 3 types of shape, namely: small, medium and large, so as to meet all clinical situations.

Les 3 types de formes ont été déterminées statistiquement au moyen de mesures relevées sur des empreintes de situations cliniques antérieures.The 3 types of forms were determined statistically by means of measurements taken from imprints of previous clinical situations.

Sous cette embrase invariable N, vient s'adapter un plateau de moulageamovible P destiné à la réalisation de travaux sur divers types d'articulateur physiologique (fig 10). Le plateau P comporte des formes de rétention pour accrocher le pl8tre sur lequel il est déposé au moment de la mise en position sur l'ar ttculateur physiologique.Under this invariable base N, comes a removable molding plate P intended for carrying out work on various types of physiological articulator (fig 10). The tray P includes retention forms for hanging the pl8tre on which it is deposited at the time of positioning on the physiological ar ttculator.

Le moule ietable J
Le moule jetable J a pour fonction de contenir sur sa partie supérieure S, le plâtre qui vient d'entre coulé dans l'empreinte initiale I.The ietable J mold
The disposable mold J has the function of containing on its upper part S, the plaster which has just entered into the initial impression I.

La surface S, comporte pour facilité l'adhérence et l'accroche de la coulée de plâtre un guillochage, ainsi que des trous de scellements dans lesquels le plate pénètre afin que la prise s'effectue (fig 11). The surface S, for ease of adhesion and attachment of the plaster cast, a guilloche, as well as sealing holes in which the plate penetrates so that the setting is made (fig 11).

Une coupe transversale selon bb représentée fig 16, montre la disposition du moule jetable lors de la coulée du plâtre dans l'empreinte initiale I. A cross section along bb shown in FIG. 16 shows the arrangement of the disposable mold when the plaster is poured into the initial impression I.

La fig 11, montre le positionnement de l'ensemble matrice M moule jetable J selon une même coupe aa. Devant pouvoir entre sectionné selon divers plans, le moule jetable J est fabriqué en matière plastique tendre et légèrement souple : la qualité de souplesse que doit posséder le matériau est destinée à faciliter les légers mouvements d'écartement selon les flêches El (fig 13) et E2 (fig 11) afin de faciliter pour El le positionnement puis la désolidarisation générale matriceAmoule, pour E2 le positionnement puis la désolidarisation de toute partie sectionnée sur laquelle le technicien élabore la prothèse. FIG. 11 shows the positioning of the matrix assembly M disposable mold J in the same section aa. In front of being able to be sectioned according to various plans, the disposable mold J is made of soft and slightly flexible plastic material: the quality of flexibility that the material must have is intended to facilitate slight movements of separation according to the arrows El (fig 13) and E2 (fig 11) in order to facilitate for El the positioning then the general separation matrixAmoule, for E2 the positioning then the separation of any sectioned part on which the technician develops the prosthesis.

La fig 11, précise les détails de forme respective de la matrice et du moule jetable. FIG. 11 specifies the details of the respective shape of the matrix and of the disposable mold.

- E, ergot et épaulement sur toute la périphérie externe des 2 pièces pour assurer en tout point un accrochage primaire - F1 ergot et épaulement sur toute la périphérie interne des 2 pièces pour assurer en tout point leur accrochage. Les formes de cet ensemble sont de moindre importance que celles de l'ensem'ble E, dispositif d'accrochage primaire.- E, lug and shoulder over the entire outer periphery of the 2 parts to ensure primary attachment at all points - F1 lug and shoulder over the entire inner periphery of the 2 parts to ensure their attachment at all points. The shapes of this set are of less importance than those of the set E, the primary hanging device.

- F2 face d'appui et épaulement sur toute la périphérie interne des 2 pièces pour assurer en tout leur parait ajustement.- F2 bearing face and shoulder over the entire inner periphery of the 2 parts to ensure that everything seems to fit.

Une denture à pas croissant D selon la flêche Dï fig 12, pratiquée sur la face supérieure et la partie interne de la matrice, et son inverse, pratiqué sur la face opposé du moule jetable évite toute mise en, place malencontreuse en particulier lorsque le moule jetable a pu être découpé selon divers plans pour exécuter les travaux de prothèse. Une numérotation sur deux lignes décalées, évite toute mise en place inversée (côté gauche/droit) lcrs de ces mêmes manipulation fig 14.A tooth pitch with increasing pitch D according to the arrow Dï fig 12, practiced on the upper face and the internal part of the matrix, and its reverse, practiced on the opposite face of the disposable mold avoids any implementation, unfortunate place in particular when the mold disposable could be cut according to various plans to carry out the prosthesis work. A numbering on two offset lines, avoids any reverse implementation (left / right side) lcrs of these same manipulation fig 14.

Une sécurité complémentaire est prévue pour maintenir en place les éléments du moule jetable lorsque celui-ci a été tronconné selon plusieurs plans. Additional security is provided to keep the disposable mold elements in place when it has been cut off in several planes.

Des trous de goupillage, correspondant sur le moule et la matrice existent sur toute la longeur des 2 pièces. Ils permettent d'enficher à l'aide de fine goupille, moule et matrice, comme l'illustre la fig. 1. Pin holes, corresponding on the mold and the matrix exist over the entire length of the 2 pieces. They allow to be plugged in using a fine pin, mold and matrix, as illustrated in fig. 1.

Le dispositif tel qu'il vient d'être décrit peut également être utilisé pour la réalisation de travaux de prothèse ne mettant en jeu qu'un c8té de la machoire. The device as just described can also be used for carrying out prosthesis work involving only one side of the jaw.

Le technicien sectionne le moule jetable pour utiliser la partie utile. La partie restante peut d'ailleurs être utilisée selon le cas pour la machoire antagorste
La vue d'ensemble 17, représente l'ensemble du dispositif selon une vue en perspective. The technician cuts the disposable mold to use the useful part. The remaining part can also be used as appropriate for the antagorste jaw
The overall view 17 represents the entire device according to a perspective view.

Claims

CLAIM5

1) Device for manufacturing a working model used to perform dental prosthesis work comprising an articulated assembly A, composed of two arms, a matrix M stadaptant on each arm, a disposable mold J fitting on each matrix M. The disposable mold, applied to the plaster casting carried out in the initial impression I, 9 constitutes, after taking the plaster, the base for the reproduction of the impression I.

2) Device according to claim 1 characterized per6un articulated assembly made of resistant material metal, plastic or undeformable resin, schematically reproducing the movement of the jaws, comprising ct? Ux arms Al and A29 with an adjustment of the closing angle dss two arms and a hinge pin that can move slightly in the horizontal plane.

3) Device according to claim 2 characterized in that each arm consists of two branches intended to receive, by gllssementt the matrix Mç each of the branches having a positioning shoulder X, and a locking clip Cl of the matrix M.

4) Device according to claim 2 characterized by a leaf spring R, fixed on each amount back branches of the lower arm A1, allowing the establishment of the hinge pin 0, integral with the upper arm and a slight rotation of the upper arm A2 in the horizontal plane along L.

5) Device according to claim 2, characterized by an adjustment screw with thumbwheel, screwed onto the arm A1 and bearing on the opposite arm A2 in order to adjust the angle of iron meture of the 2 arms.

6) Device according to claim 1 and 3, characterized by a matrix M, made of resistant material (metal, plastic or non-deformable resin) comprising a standardized base and an upper part which can be aligned according to various types of jaws, and on which adjusts the disposable mold J.

7) Device according to claims 1 and 6 characterized by two peripheral shoulders E and F2, on which rests and s t engages the disposable mold J.

8) Device according to claims 1 and 6 characterized by a toothing D with increasing pitch from the rear to the front according to

D1, located on the upper face and the internal side of the matrix and on which the disposable mold J. adjusts.

9) Device according to claims 1 and 6 characterized by a groove F1, surrounding the lower internal periphery and serving as a point of attachment to the disposable mold J.

10) Device according to claim 6> characterized in that the matrix comprises a base of rounded shapes comprising two housings L, slidingly receiving the arms of the articulated system arm, and two attachment cavities C2 of the fixed locking clip C1 fixed on each of the 2 branches of each arm of the articulated system.

11) Device according to claim 6 characterized in that the standardized base can receive by interlocking a removable tray, allowing the use of the matrix / disposable mold couple on physiological articulators.

12) Device according to claim 6 characterized in that the upper part of the matrix M can & re produced according to various types of jaw shapes determined statistically, in order to respond to the majority of clinical situations that arise.

13) Device according to claims 1 and 6 characterized by a set of pin holes G, made around the entire periphery of the matrix.

14) Device according to claims 1, 6, 7, 8, 9, 10 and 12 characterized by a disposable mold J made with a sawable material having elasticity properties (flexible plastic) locking and adjusting on the forms D , E, F1 and F2 of ~ the matrix M.

15) Device according to claim 14 characterized by sealing holes 5 and a guilloche on the upper face of the mold intended to increase during the setting of the plaster the attachment of the reproduction R of the imprint on the mold J.

16) Device according to claims 7, 8, 9, 10 and 12 characterized by a set of shapes complementary to those of the matrix M, formed on the mold J and comprising two projecting shoulders, one E on the entire lower part external of the mold, the other F1 on the internal lower part of the mold, a toothing D according to the same increasing pitch as the matrix M formed in the recess of the mold, and a set of pin holes 6 superimposed on those formed on the matrix M.

17) Device according to claim 14 characterized by a numbering N1 and N2 from 1 to 8 practiced on the external periphery of the mold J on two offset planes, intended to facilitate the location and the replacement of the elements of the mold which have been cut out.

18) Device according to claims 1, 6 and 14 characterized by a positioning and locking tab L, placed on the rear part of the mold, with a retaining lug N pressing on the rear face of the matrix M.

19) Device according to all of the above claims (1 to 16) characterized in that the assembly can be designed for the manufacture of prosthesis work involving half of the jaw, each element of the device then being brought back to a half-element along the axis of symmetry of the assembly.