WO1993024074A1 - Device for the preparation of a given quantity of a dental restoration material - Google Patents

Device for the preparation of a given quantity of a dental restoration material Download PDF

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Publication number
WO1993024074A1
WO1993024074A1 PCT/FR1992/000464 FR9200464W WO9324074A1 WO 1993024074 A1 WO1993024074 A1 WO 1993024074A1 FR 9200464 W FR9200464 W FR 9200464W WO 9324074 A1 WO9324074 A1 WO 9324074A1
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WO
WIPO (PCT)
Prior art keywords
components
distributor
mixer
color
quantities
Prior art date
Application number
PCT/FR1992/000464
Other languages
French (fr)
Inventor
Jean-Pierre Tretout
Original Assignee
Tretout Jean Pierre
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tretout Jean Pierre filed Critical Tretout Jean Pierre
Publication of WO1993024074A1 publication Critical patent/WO1993024074A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C19/00—Dental auxiliary appliances
    • A61C19/10—Supports for artificial teeth for transport or for comparison of the colour
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/84—Mixing plants with mixing receptacles receiving material dispensed from several component receptacles, e.g. paint tins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/84—Mixing plants with mixing receptacles receiving material dispensed from several component receptacles, e.g. paint tins
    • B01F33/844—Mixing plants with mixing receptacles receiving material dispensed from several component receptacles, e.g. paint tins with means for customizing the mixture on the point of sale, e.g. by sensing, receiving or analysing information about the characteristics of the mixture to be made
    • B01F33/8442—Mixing plants with mixing receptacles receiving material dispensed from several component receptacles, e.g. paint tins with means for customizing the mixture on the point of sale, e.g. by sensing, receiving or analysing information about the characteristics of the mixture to be made using a computer for controlling information and converting it in a formula and a set of operation instructions, e.g. on the point of sale
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/2131—Colour or luminescence
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/82—Forming a predetermined ratio of the substances to be mixed by adding a material to be mixed to a mixture in response to a detected feature, e.g. density, radioactivity, consumed power or colour
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/463—Colour matching
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/508—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors measuring the colour of teeth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/19—Mixing dentistry compositions

Definitions

  • the present invention relates to the field of dental surgery and more particularly that of the restoration or reconstruction of the teeth of a patient.
  • dental surgery There are today, at the disposal of the dental surgeon a very large number of synthetic components which allow by polymerization, or in the form of ceramics, to reconstruct partially or completely one or more teeth.
  • the reconstitution of color This reconstruction is currently carried out approximately by the practitioner who has a color chart drawn up by the component manufacturer which, by eye, the practitioner compares the color of his patient's teeth to choose the component who comes closest to it. The results obtained are rarely satisfactory.
  • the object of the present invention is to remedy this drawback by proposing a device by means of which it is possible to exactly reproduce the colors of a tooth or even its different shades and its shade gradations.
  • the invention therefore relates to a device for preparing a material for use in dental restau ⁇ ration; which includes: - a spectrometer to analyze the color of the existing dental structure in the vicinity of the location of the restoration to be carried out,
  • a programmed information processing unit comprising in memory the colorimetric characteristics of each of the basic components, connected by its inputs to the spectrocolorimeter and to a manual member of introduction of the quantity of material required, and through its outlets, to the distributor and to the mixer, so as to control, after calculation, the number and the quantities of the components to be distributed as well as the mixture of these to obtain the quantity requested material of the color analyzed.
  • the distributor comprises a main compartment for storing a medium shade component, the other compartments being of smaller volume for additive components of different shades.
  • the apparatus according to the invention comprises, in this figure, a spectrocolorimeter 1 by means of which it is possible to analyze the color of a tooth 2 or of a portion of tooth 3 adjacent to zone 4 where the restoration is to take place. .
  • the parameters of this color are transmitted to a programmed information processing unit 5, represented here in the form of a microcomputer, the keyboard 6 of which allows manual entry of set values such as for example the quantity of material required. to catering.
  • the outputs of the processing unit are, in addition to the screen 7 for viewing the processed data and the results of the calculations or readings made, connected to a distributor-mixer 8 of components.
  • the schematic representation of this device shows a carousel 9 comprising a plurality (five or six) of compartments 10, 11 for storing the components necessary for constituting the synthetic material and reproducing the color analyzed.
  • One of the compartments 10 is of significantly greater volume than the others and is filled with a component, the shade of which corresponds to the average shade of the teeth, that is to say close to the eye.
  • Each compartment is provided, in the upper part of a piston 12, 13 for the extrusion of the product through a lower outlet opening 14, 15.
  • the carousel 9 is mounted to rotate relative to a fixed support 16 and its rotation control (by angular sectors) is ensured by a motor 17 connected to an output of the microcomputer 5.
  • a micrometric screw jack 18 supported by the support 16, makes it possible to actuate the thrust of the pistons 12, 13 when these are located, located at its base.
  • the actuation of the jack (approach stroke, useful stroke amplitude, ascent) is also controlled by the microcomputer 5. It is thus possible to deliver into a mixing crucible 19, a determined and precise quantity of each component present in the compartments in the form of a paste or gel.
  • this crucible is ensured by any known means, here symbolized by an agitator connected to a drive motor 20, itself controlled by the microcomputer 5. It will be noted that the mixing can be carried out by shaking the crucible in removable container form which can then constitute a cartridge which can be transferred to an injection syringe.
  • the processing unit 5 has a calculation program which makes it possible, from data from the spectro-colorimeter 1, the quantity of material ordered by the practitioner and the colorimetric characteristics of the components of the material present in the dispenser and previously recorded, to determine the number and quantity of the components that should be mixed to obtain the reconstitution material of the same shade as that analyzed and in sufficient quantity.
  • This material placed in the mouth by the practitioner, is shaped so suitable and is then polymerized by means of appropriate radiation, in a known manner.
  • the program of the calculation unit can be sufficiently developed to allow the following operations to be carried out.

Abstract

The device of the invention includes a spectrocolorimeter (1) for analyzing the colour of the dental structure (2, 3) near the site (4) of the restoration to be effected, a dispenser (9) of given and adjustable quantities of basic components, different dyes, in paste or gel form, and a mixer (19) positioned at the outlet of the dispensor (9) for preparing a blend of at least two components. The device also includes a programmed data processing unit with the colorimetric features of each of the basic components stored in its memory, the device being connected via its inputs to the spectrocolorimeter (1) and to a manual element (6) for introducing the quantity of the required material. Said data processing unit is connected via its outputs to the dispenser (9) and the mixer (19), so as to control, after computation, the number and quantities of the components to be dispensed as well as their blending with a view to obtaining the desired quantity of material of the colour analyzed.

Description

Dispositif de préparation d'une quantité définie d'un matériau de restauration dentaire. Device for preparing a defined quantity of dental restorative material.
La présente invention concerne le domaine de la chirurgie dentaire et plus particulièrement celui de la restauration ou la reconstitution des dents d'un patient. II existe aujourd'hui, à la disposition du chirurgien dentiste un très grand nombre de composants synthétiques qui permettent par polymérisation, ou sous forme de céramiques, de reconstruire partiellement ou totale¬ ment une ou plusieurs dents. II demeure une difficulté à surmonter : la reconstitution de la couleur. Cette reconstitution est à l'heure actuelle réalisée de manière approximative par le praticien qui dispose d'un nuancier établi par le fabri¬ cant de composant auquel, à l'oeil, le praticien compare la couleur des dents de son patient pour choisir le composant qui s'en rapproche le plus. Les résultats obtenus sont rarement satisfaisants.The present invention relates to the field of dental surgery and more particularly that of the restoration or reconstruction of the teeth of a patient. There are today, at the disposal of the dental surgeon a very large number of synthetic components which allow by polymerization, or in the form of ceramics, to reconstruct partially or completely one or more teeth. There remains a difficulty to be overcome: the reconstitution of color. This reconstruction is currently carried out approximately by the practitioner who has a color chart drawn up by the component manufacturer which, by eye, the practitioner compares the color of his patient's teeth to choose the component who comes closest to it. The results obtained are rarely satisfactory.
Le but de la présente invention est de remédier à cet inconvénient en proposant un dispositif grâce auquel il est possible de reproduire exactement les couleurs d'une dent voire ses nuances différentes et ses dégradés de teinte. A cet effet, l'invention a donc pour objet un dispositif de préparation d'un matériau à usage de restau¬ ration dentaire; qui comporte ' : - un spectro colorimètre pour analyser la couleur de la structure dentaire existant au voisinage de l'emplacement de la restauration à réaliser,The object of the present invention is to remedy this drawback by proposing a device by means of which it is possible to exactly reproduce the colors of a tooth or even its different shades and its shade gradations. To this end, the invention therefore relates to a device for preparing a material for use in dental restau¬ ration; which includes: - a spectrometer to analyze the color of the existing dental structure in the vicinity of the location of the restoration to be carried out,
- un distributeur de quantités définies et réglables d'une pluralité de composants de base, de teintes différentes, en forme de pâte ou de gel,- a distributor of defined and adjustable quantities of a plurality of basic components, of different colors, in the form of a paste or gel,
- un mélangeur placé en sortie du distributeur pour confectionner un mélange d'au moins deux composants,- a mixer placed at the outlet of the distributor for making a mixture of at least two components,
- et une unité programmée de traitement de informations comportant en mémoire les caractéristique colorimétriques de chacun des composants de base, relié par ses entrées au spectrocolorimètre et à un organe manue d'introduction de la quantité de matériau nécessaire, et par ses sorties, au distributeur et au mélangeur, de manière à commander, après calcul, le nombre et les quantités des composants à distribuer ainsi que le mélange de ceux-ci pour obtenir la quantité demandée de matériau de la couleur analysée.- and a programmed information processing unit comprising in memory the colorimetric characteristics of each of the basic components, connected by its inputs to the spectrocolorimeter and to a manual member of introduction of the quantity of material required, and through its outlets, to the distributor and to the mixer, so as to control, after calculation, the number and the quantities of the components to be distributed as well as the mixture of these to obtain the quantity requested material of the color analyzed.
Pour prendre en compte le fait que les diffé¬ rentes couleurs à reproduire sont toutes comprises dans une gamme de nuances d'une couleur générale du type ivoire, le distributeur comporte un compartiment principal de stockag d'un composant de teinte moyenne, les autres compartiments étant de volume moindre pour des composants additifs de teintes différentes.To take into account the fact that the different colors to be reproduced are all included in a range of shades of a general color of the ivory type, the distributor comprises a main compartment for storing a medium shade component, the other compartments being of smaller volume for additive components of different shades.
D'autres caractéristiques et les avantages de l'invention ressortiront de la description ci-après d'un exemple de réalisation.Other characteristics and advantages of the invention will emerge from the description below of an exemplary embodiment.
Il sera fait référence au dessin annexé qui représente schématiquement un appareil selon l'invention. L'appareil selon l'invention comprend, sur cette figure, un spectrocolorimètre 1 au moyen duquel on peut analyser la couleur d'une dent 2 ou d'une portion de dent 3 voisine de la zone 4 où doit avoir lieu la restau¬ ration. Les paramètres de cette couleur sont transmis à une unité programmée 5 de traitement des informations, représentée ici sous la forme d'un micro-ordinateur dont le clavier 6 permet l'entrée manuelle de valeurs de consigne telles que par exemple la quantité de matériau nécessaire à la restauration. Les sorties de l'unité de traitement sont, en plus de l'écran 7 de visualisation des données traitées et des résultats des calculs ou des relevés effec¬ tués, connectées à un distributeur-mélangeur 8 de composants. La représentation schématique de cet appareil fait apparaître un carrousel 9 comportant une pluralité (cinq ou six) de compartiments 10, 11 de stockage des compo- sants nécessaires à la constitution du matériau de synthèse et à la reproduction de la couleur analysée. L'un des compar¬ timents 10 est de volume nettement plus important que les autres et est rempli d'un composant dont la teinte correspond à la teinte moyenne des dents c'est-à-dire proche de l'i- voire. Chaque compartiment est pourvu, en partie supérieure d'un piston 12, 13 pour l'extrusion du produit au travers d'une ouverture de sortie inférieure 14, 15.Reference will be made to the appended drawing which schematically represents an apparatus according to the invention. The apparatus according to the invention comprises, in this figure, a spectrocolorimeter 1 by means of which it is possible to analyze the color of a tooth 2 or of a portion of tooth 3 adjacent to zone 4 where the restoration is to take place. . The parameters of this color are transmitted to a programmed information processing unit 5, represented here in the form of a microcomputer, the keyboard 6 of which allows manual entry of set values such as for example the quantity of material required. to catering. The outputs of the processing unit are, in addition to the screen 7 for viewing the processed data and the results of the calculations or readings made, connected to a distributor-mixer 8 of components. The schematic representation of this device shows a carousel 9 comprising a plurality (five or six) of compartments 10, 11 for storing the components necessary for constituting the synthetic material and reproducing the color analyzed. One of the compartments 10 is of significantly greater volume than the others and is filled with a component, the shade of which corresponds to the average shade of the teeth, that is to say close to the eye. Each compartment is provided, in the upper part of a piston 12, 13 for the extrusion of the product through a lower outlet opening 14, 15.
Le carrousel 9 est monté tournant par rapport à un support 16 fixe et sa commande en rotation (par sec- teurs angulaires) est assurée par un moteur 17 relié à une sortie du micro-ordinateur 5.The carousel 9 is mounted to rotate relative to a fixed support 16 and its rotation control (by angular sectors) is ensured by a motor 17 connected to an output of the microcomputer 5.
Un vérin à vis micrométrique 18 supporté par le support 16, permet d'actionner la poussée des pistons 12, 13 lorsque ceux-ci se trouvent, situés à son aplomb. L'actionnement du vérin (course d'approche, amplitude de course utile, remontée) est également commandé par le micro¬ ordinateur 5. Il est ainsi possible de délivrer dans un creuset 19 de mélange, une quantité déterminée et précise de chaque composant présent dans les compartiments sous forme de pâte ou de gel.A micrometric screw jack 18 supported by the support 16, makes it possible to actuate the thrust of the pistons 12, 13 when these are located, located at its base. The actuation of the jack (approach stroke, useful stroke amplitude, ascent) is also controlled by the microcomputer 5. It is thus possible to deliver into a mixing crucible 19, a determined and precise quantity of each component present in the compartments in the form of a paste or gel.
Le mélange de ce creuset est assuré par tout moyen connu, ici symbolisé par un agitateur relié à un moteur d'entraînement 20, lui-même commandé par le micro¬ ordinateur 5. On notera que le mélange peut être réalisé par secouage du creuset en forme de conteneur amovible qui peut constituer alors une cartouche transférable dans une seringue d'injection.The mixing of this crucible is ensured by any known means, here symbolized by an agitator connected to a drive motor 20, itself controlled by the microcomputer 5. It will be noted that the mixing can be carried out by shaking the crucible in removable container form which can then constitute a cartridge which can be transferred to an injection syringe.
L'unité 5 de traitement possède un programme de calcul qui permet, à partir des données issues du spectro- colorimètre 1 , de la quantité de matériau commandée par le praticien et des caractéristiques colorimètriques des composants du matériau présents dans le distributeur et préalablement enregistrées, de déterminer le nombre et la quantité des composants qu'il convient de mélanger pour obtenir le matériau de reconstitution de la même teinte que celle analysée et en quantité suffisante. Ce matériau, placé en bouche par le praticien, est conformé de manière adéquate et est ensuite polymérisé au moyen d'un rayonnement approprié, ce de manière connue.The processing unit 5 has a calculation program which makes it possible, from data from the spectro-colorimeter 1, the quantity of material ordered by the practitioner and the colorimetric characteristics of the components of the material present in the dispenser and previously recorded, to determine the number and quantity of the components that should be mixed to obtain the reconstitution material of the same shade as that analyzed and in sufficient quantity. This material, placed in the mouth by the practitioner, is shaped so suitable and is then polymerized by means of appropriate radiation, in a known manner.
Le programme de l'unité de calcul peut être suffisamment développé pour permettre de procéder aux opéra- tions suivantes.The program of the calculation unit can be sufficiently developed to allow the following operations to be carried out.
On sait que la couleur d'une dent résulte, en un point précis, de la superposition de la couleur de la dentine (jaune) et de celle de l'émail (blanc translu¬ cide). Cette couleur est variable de la racine à la pointe de la dent car elle dépend de l'épaisseur de la couche d'émail qui, fine vers le collet, laisse transparaître la couleur de la dentine pour la masquer de plus en plus (et la blanchir) en direction de la pointe de la dent. Il est donc possible avec le spectrocolorimètre, de relever les caractéristiques de la couleur de la dentine au niveau du collet et de celle de l'émail au niveau de la pointe de la dent. L'ordinateur peut alors, en fonction d'un relevé topographique d'une dent symétrique de celle à reconstituer, reconstituer les variations de teinte de la dent. Il peut également, s'il possède dans son programme des modèles de dents, déterminer en fonction de la zone de la dent, l'épaisseur de la couche d'émail recouvrant la dentine et sa variation le long de la dent. Il peut enfin proposer un programme de restructuration en deux phases, l'une concernant la dentine et l'autre concernant l'émail. Si ce projet est accepté par le praticien, il prépare les matériaux nécessaires à la réalisation de ces deux phases.We know that the color of a tooth results, at a precise point, from the superimposition of the color of the dentin (yellow) and that of the enamel (translucent white). This color is variable from the root to the tip of the tooth because it depends on the thickness of the enamel layer which, thin towards the collar, lets the color of the dentin show through to mask it more and more (and the whiten) towards the tip of the tooth. It is therefore possible with the spectrocolorimeter, to note the characteristics of the color of the dentine at the level of the collar and that of the enamel at the level of the tip of the tooth. The computer can then, according to a topographical survey of a tooth symmetrical with that to be reconstructed, reconstruct the variations in shade of the tooth. He can also, if he has models of teeth in his program, determine according to the area of the tooth, the thickness of the enamel layer covering the dentin and its variation along the tooth. He can finally propose a restructuring program in two phases, one concerning dentin and the other concerning enamel. If this project is accepted by the practitioner, he prepares the materials necessary for carrying out these two phases.
On comprend que l'invention est applicable également dans le domaine de la réalisation de prothèses à l'extérieur du cabinet dentaire. It is understood that the invention is also applicable in the field of the production of prostheses outside the dental office.

Claims

REVENDICATIONS
1. Dispositif de préparation d'une quantité définie d'un matériau à usage de restauration dentaire caractérisé en ce qu'il comporte :1. Device for preparing a defined quantity of a material for use in dental restoration, characterized in that it comprises:
- un spectro colorimètre (1 ) pour analyser la couleur de la structure dentaire (2,3) existant au voisi¬ nage de l'emplacement (4) de la restauration à réaliser,a spectrometer (1) for analyzing the color of the dental structure (2,3) existing in the vicinity of the location (4) of the restoration to be produced,
- un distributeur (9) de quantités définies et réglables d'une pluralité de composants de base, de teintes différentes, en forme de pâte ou de gel, - un mélangeur (19) placé en sortie du distri¬ buteur (9) pour confectionner un mélange d'au moins deux composants,- a distributor (9) of defined and adjustable quantities of a plurality of basic components, of different shades, in the form of a paste or gel, - a mixer (19) placed at the outlet of the distributor (9) for making a mixture of at least two components,
- et une unité (5) programmée de traitement des informations comportant en mémoire les caractéristiques colorimétriques de chacun des composants de base, reliée par ses entrées au spectro colorimètre (1 ) et à un organe manuel (6) d'introduction de la quantité de matériau néces¬ saire, et par ses sorties, au distributeur (9) et au mélangeur (19) de manière à commander, après calcul, le nombre et les quantités des composants à distribuer ainsi que le mélange de ceux-ci pour obtenir la quantité demandée de matériau de la couleur analysée.- And a unit (5) programmed for processing information comprising in memory the colorimetric characteristics of each of the basic components, connected by its inputs to the spectro colorimeter (1) and to a manual member (6) for introducing the quantity of necessary material, and by its outputs, to the distributor (9) and to the mixer (19) so as to control, after calculation, the number and the quantities of the components to be distributed as well as the mixture of these to obtain the quantity requested material of the color analyzed.
2. Dispositif selon la revendication 1, carac¬ térisé en ce que le distributeur (9) coporte un compartiment principal (10) de stockage d'un composant de teinte moyenne, les autres compartiments (11) étant de volume moindre pour des composants additifs de teintes différentes. 2. Device according to claim 1, charac¬ terized in that the distributor (9) co-distributes a main compartment (10) for storing a medium-tint component, the other compartments (11) being of smaller volume for additive components of different shades.
PCT/FR1992/000464 1990-11-26 1992-05-25 Device for the preparation of a given quantity of a dental restoration material WO1993024074A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9014768A FR2669526B1 (en) 1990-11-26 1990-11-26 DEVICE FOR PREPARING A DEFINED QUANTITY OF A DENTAL RESTORATION MATERIAL.

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Publication Number Publication Date
WO1993024074A1 true WO1993024074A1 (en) 1993-12-09

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FR2669526B1 (en) 1993-02-19

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