WO1999039657A1 - Photochemical apparatus, in particular for producing dental prostheses - Google Patents
Photochemical apparatus, in particular for producing dental prostheses Download PDFInfo
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- WO1999039657A1 WO1999039657A1 PCT/FR1999/000276 FR9900276W WO9939657A1 WO 1999039657 A1 WO1999039657 A1 WO 1999039657A1 FR 9900276 W FR9900276 W FR 9900276W WO 9939657 A1 WO9939657 A1 WO 9939657A1
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- photochemistry
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- turntable
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C19/00—Dental auxiliary appliances
- A61C19/003—Apparatus for curing resins by radiation
Definitions
- the invention relates to a photochemistry apparatus for exposing to light radiation, the duration, intensity and spectrum of which can be suitably chosen, in which photochemical reactions are carried out.
- photochemical reactions may, for example, be biological reactions, or polymeric materials which are hardened using a photoinitiator mixed with the polymers.
- Such photochemistry devices are used in particular for the production of artificial teeth.
- These dental prostheses consist of a metal frame coated with a composite made of successive layers of polymeric materials. For each of these layers, the technician chooses the appropriate transparency and opalescence, with the result of obtaining teeth closely resembling the natural teeth of the wearer of the prosthesis. Characteristically, each of these layers requires a specific light exposure intended to make it harden. In this regard, it is essential to be able to adjust the light intensity falling on the object, as well as the duration of exposure.
- a high light intensity for example, is required to harden opaque materials, such as that used to mask the metal framework of the prosthesis, or those used for make-up, for varnishes or glazes; you also need a high light intensity for the final cooking.
- opaque materials such as that used to mask the metal framework of the prosthesis, or those used for make-up, for varnishes or glazes; you also need a high light intensity for the final cooking.
- Halogen lamps are also used, which are capable of providing the large light intensities required for opaque materials and for finishing firing. But they too suffer from a poor lifespan given their price.
- halogen lamps constantly, there is a risk of excessive heating in the enclosure, which can cause differential expansion within the multi-layer prosthesis, as well as deterioration of the mechanical and electrical components of the device.
- the invention therefore provides a photochemistry apparatus comprising various light sources, at least one of which consists of a cold cathode tube, enclosed in an enclosure where objects are placed within which it is desired to carry out photochemical reactions, and which comprises means making it possible to expose said objects to the radiation emitted by said light sources as and when said objects are prepared for said photochemical treatment, while ensuring that each of said objects does indeed receive the expected total light dose.
- said means consist of an access door and a turntable on which said objects are placed, said plate stopping to rotate and said light sources automatically turning off as long as said door access is open.
- said sources comprise tubes of sinuous shape, of different luminances and / or emitting different light spectra, placed end to end, for optimal exposure of the objects (with regard to the intensities and light wavelengths) during their movement in the enclosure provided by means of said turntable.
- the speed of said plate is adjustable, in order to allow the adjustment of the duration of exposure of each object to said light radiation between the moment when the object is introduced into the enclosure and when we get it back.
- said photochemistry apparatus is equipped with means making it possible to vary the light flux emitted by said sources.
- said photochemistry apparatus comprises a sensor used to measure the light intensity received by said objects, and an electronic regulation device, so as to be able to automatically compensate for variations in luminance of sources during their life by modifying the speed of said turntable or the power supply of light sources, or both.
- said photochemistry apparatus comprises a second turntable, smaller than the turntable mentioned above and mounted on it, and a light source additional to the collimated beam, intended for special uses, as well as a control logic, the assembly being arranged so that the large turntable can drive the small turntable from a position facing said access door to a position facing to said additional light source.
- FIG. 1 is a side elevation of the photochemistry apparatus illustrated in Figure 1.
- the photochemistry apparatus is contained in a housing 1.
- This housing 1 is provided with a door 2 with easy opening giving access to an interior enclosure 5.
- the objects to be treated (not shown) are placed on a turntable 3, and exposed to light radiation from one or more sources 4 which are arranged at the top of the enclosure 5.
- the access door 2 is provided with a filter glass through which you can see the objects to be treated.
- At least one of these light sources 4 is constituted by a cold cathode tube, which has been chosen so that the spectrum of the radiation which it emits best excites the photochemical reaction involved. If necessary, can easily combine several such tubes in series, each emitting a different wavelength spectrum from the other tubes.
- This series of tubes can be arranged in accordance with the circular movement of the objects carried by the turntable 3, so that the exposure to determined wavelengths takes place in a certain preferential order.
- the access door 2 is opened, which automatically controls the interruption of the movement of the turntable 3 as well as the extinction of the sources 4; said object is placed on the turntable 3; the access door 2 is closed, which automatically restarts the turntable 3 and turns on the sources 4.
- a given object will have received a total dose of light energy known when the turntable 3 has turned certain angle (which is appreciated by following the movement of said object with your eyes); the access door 2 is then opened to exit it from the enclosure 5, and 1 'the access door 2 is closed, and so on.
- each object will be placed and picked up in the most convenient place, namely just in front of the access door 2.
- the time required for the exposure of objects to radiation corresponds at an integer number of turns of the turntable 3. This is easy to adjust when the photochemistry apparatus is equipped with a speed control for rotating said turntable 3 (not shown).
- the photochemistry apparatus will be equipped with a device for controlling the power supply of the sources 4, in order to allow an appropriate luminance adjustment.
- the photochemistry apparatus will preferably be equipped with 'a light intensity sensor (not shown) placed in the enclosure 5.
- 'a light intensity sensor not shown
- This compensatory adjustment can be done manually, or better, automatically using a suitable logic circuit.
- an additional light source 7 has been provided at the top of the enclosure 5, the beam of which, of limited extent, is directed towards the rear of the enclosure 5 relative to the access door 2 , so that the radiation emitted by said source 7 does not risk reaching the users of the photochemistry apparatus.
- This additional source 7 is used for special radiation applications.
- this source 7 is advantageously constituted by a halogen lamp intended for the hardening of opaque materials and for finishing baking.
- a second turntable 6, smaller than the first turntable 3, is mounted on the latter, the center of the second turntable 6 being placed approximately in the middle of 'a 7
- an object to be treated is placed by means of the radiation emitted by the additional source 7, on the small tray 6 while the latter is stationed facing the access door; said object is placed there; after closing the door, thanks to a special program that has been started for this purpose, the large plate 3 automatically rotates by half a turn so as to bring the small rotating plate 6 opposite the light beam emitted by the additional source 7. Arrived at the right position, the small plate 6 engages with a gear which makes it rotate on itself to allow a uniform exposure of said object to said special radiation. At the end of the allocated exposure time, the said object is recovered by having the large plate 3 turn again.
- an additional advantage of the invention consists in that the temperature of the enclosure remains moderate; as explained above, this advantage is appreciable.
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- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The invention concerns a photochemical apparatus comprising at least one light source (4) enclosed in a chamber (5) wherein are placed objects within which it is desired to carry out photochemical reactions, in which at least one of said light sources (4) consists of a cold cathode tube, further comprising means (2, 3) for exposing said objects to radiation emitted by said light sources (4) as said objects are being prepared for said photochemical treatment. The invention is applicable to dental prostheses.
Description
Appareil de photochimie, notamment pour la réalisation de prothèses dentaires Photochemistry apparatus, in particular for making dental prostheses
L'invention concerne un appareil de photochimie servant à exposer à un rayonnement lumineux dont on peut choisir de manière appropriée la durée, l'intensité et le spectre, des objets au sein desquels on met en œuvre des réactions photochimiques. Il peut s'agir par exemple de réactions biologiques, ou de matières polymères que l'on fait durcir à l'aide d'un photoinitiateur mélangé aux polymères.The invention relates to a photochemistry apparatus for exposing to light radiation, the duration, intensity and spectrum of which can be suitably chosen, in which photochemical reactions are carried out. These may, for example, be biological reactions, or polymeric materials which are hardened using a photoinitiator mixed with the polymers.
De tels appareils de photochimie sont utilisés en particulier pour la réalisation de dents artificielles. Ces prothèses dentaires sont constituées d'une armature métallique revêtue d'un composite fait de couches successives de matières polymères. Pour chacune de ces couches, le prothésiste choisit la transparence et l'opalescence adéquates, avec pour résultat l'obtention de dents ressemblant de près aux dents naturelles du porteur de la prothèse. De façon caractéristique, chacune de ces couches requiert une exposition lumineuse spécifique destinée à la faire durcir. A cet égard, il est essentiel de pouvoir régler l'intensité lumineuse tombant sur l'objet, ainsi que la durée d'exposition. Une intensité lumineuse élevée, par exemple, est requise pour faire durcir les matières opaques, telles que celle servant à masquer l'armature métallique de la prothèse, ou celles utilisées pour les maquillages, pour les vernis ou les glaçages ; on a aussi besoin d'une intensité lumineuse élevée pour la cuisson de finition. D '. autre part, il est en général avantageux de pouvoir choisir le spectre lumineux émis par les sources en fonction du photoinitiateur utilisé, afin de s'adapter aux longueurs d'onde auxquelles il est le plus sensible .Such photochemistry devices are used in particular for the production of artificial teeth. These dental prostheses consist of a metal frame coated with a composite made of successive layers of polymeric materials. For each of these layers, the technician chooses the appropriate transparency and opalescence, with the result of obtaining teeth closely resembling the natural teeth of the wearer of the prosthesis. Characteristically, each of these layers requires a specific light exposure intended to make it harden. In this regard, it is essential to be able to adjust the light intensity falling on the object, as well as the duration of exposure. A high light intensity, for example, is required to harden opaque materials, such as that used to mask the metal framework of the prosthesis, or those used for make-up, for varnishes or glazes; you also need a high light intensity for the final cooking. Of. on the other hand, it is generally advantageous to be able to choose the light spectrum emitted by the sources as a function of the photoinitiator used, in order to adapt to the wavelengths to which it is most sensitive.
Parmi les appareils actuellement en usage servant à illuminer des prothèses dentaires pendant leur fabrication, beaucoup utilisent des lampes à décharge dans le xénon, émettant des éclairs périodiques, et qui sont enfermées dans une enceinte dans laquelle on place l'objet à durcir. Ces lampes, cependant, présentent de sérieux inconvénients : - elles émettent fortement dans l'ultraviolet, d'où une
2 production importante d'ozone qui pollue inévitablement la région environnante (dans laquelle travaille le prothésiste) , rendant celle-ci insalubre,Among the devices currently in use used to illuminate dental prostheses during their manufacture, many use discharge lamps in xenon, emitting periodic flashes, and which are enclosed in an enclosure in which the object to be hardened is placed. These lamps, however, have serious drawbacks: - they emit strongly in the ultraviolet, hence a 2 significant production of ozone which inevitably pollutes the surrounding region (in which the technician works), making it unsanitary,
- elles ont durée de vie courte (environ un million d'éclairs, ce qui équivaut à une dizaine d'heures d'utilisation) , et qui plus est- they have a short lifespan (about one million flashes, which is equivalent to ten hours of use), and what's more
- elles sont chères.- they are expensive.
On utilise également des lampes halogènes, lesquelles sont capables de fournir les grandes intensités lumineuses requises pour les matières opaques et la cuisson de finition. Mais elles aussi souffrent d'une durée de vie médiocre compte tenu de leur prix. De plus, comme on doit, dans ces appareils connus, utiliser les lampes halogènes en permanence, on s'expose à un risque d ' échauffement excessif dans l'enceinte, qui peut causer une dilatation différentielle au sein de la prothèse multi-couches , ainsi qu'une détérioration des composants mécaniques et électriques de l'appareil.Halogen lamps are also used, which are capable of providing the large light intensities required for opaque materials and for finishing firing. But they too suffer from a poor lifespan given their price. In addition, as it is necessary, in these known devices, to use halogen lamps constantly, there is a risk of excessive heating in the enclosure, which can cause differential expansion within the multi-layer prosthesis, as well as deterioration of the mechanical and electrical components of the device.
Enfin, les objets à traiter sont exposés, dans les appareils selon l'art antérieur, durant le temps requis un à un, ce qui limite fortement le rendement, c'est-à-dire le nombre d'objets produits par heure.Finally, the objects to be treated are exposed, in the devices according to the prior art, during the time required one by one, which greatly limits the yield, that is to say the number of objects produced per hour.
Or on peut, depuis quelque temps, trouver dans l'industrie des tubes dits "à cathode froide" (que l'on a employés jusqu'à présent entre autres pour illuminer des écrans à cristaux liquides) , et qui possèdent les propriétés suivantes :However, it has been possible for some time to find in the industry so-called "cold cathode" tubes (which have been used up to now among other things to illuminate liquid crystal screens), and which have the following properties:
- leur durée de vie est au minimum de 10 000 heures,- their lifespan is at least 10,000 hours,
- la luminance d'un tel tube est assez stable, et, en fin de vie du tube, se met à baisser doucement en l'absence de réglage, mais, étant réglable au niveau de l'alimentation du tube, peut être maintenue constante pendant pratiquement toute la durée de vie du tube,- the luminance of such a tube is fairly stable, and, at the end of the life of the tube, begins to decrease slowly in the absence of adjustment, but, being adjustable at the level of the supply of the tube, can be kept constant during practically the entire life of the tube,
- ils peuvent être munis d'un revêtement luminescent, pour lequel on dispose d'une gamme de produits, ce qui permet un choix optimal (par rapport aux réactions photochimiques envisagées) des longueurs d'onde émises par
3 le tube (muni ou non d'un revêtement luminescent), et - ils peuvent être de grande longueur.- they can be provided with a luminescent coating, for which a range of products is available, which allows an optimal choice (in relation to the photochemical reactions envisaged) of the wavelengths emitted by 3 the tube (with or without a luminescent coating), and - they can be very long.
L'invention propose donc un appareil de photochimie comportant diverses sources lumineuses, dont une au moins consiste en un tube à cathode froide, enfermées dans une enceinte où l'on place des objets au sein desquels on souhaite mettre en œuvre des réactions photochimiques, et qui comprend des moyens permettant d'exposer lesdits objets au rayonnement émis par lesdites sources lumineuses au fur et à mesure de la préparation desdits objets en vue dudit traitement photochimique, tout en garantissant que chacun desdits objets reçoit bien la dose lumineuse totale prévue.The invention therefore provides a photochemistry apparatus comprising various light sources, at least one of which consists of a cold cathode tube, enclosed in an enclosure where objects are placed within which it is desired to carry out photochemical reactions, and which comprises means making it possible to expose said objects to the radiation emitted by said light sources as and when said objects are prepared for said photochemical treatment, while ensuring that each of said objects does indeed receive the expected total light dose.
Selon une caractéristique supplémentaire de l'invention, lesdits moyens sont constitués par une porte d'accès et un plateau tournant sur lequel on pose lesdits objets, ledit plateau s ' arrêtant de tourner et lesdites sources lumineuses s ' éteignant automatiquement tant que ladite porte d'accès est ouverte.According to an additional characteristic of the invention, said means consist of an access door and a turntable on which said objects are placed, said plate stopping to rotate and said light sources automatically turning off as long as said door access is open.
Selon une autre caractéristique supplémentaire de l'invention, lesdites sources comprennent des tubes de forme sinueuse, de luminances différentes et/ou émettant des spectres lumineux différents, mis bout à bout, pour une exposition optimale des objets (en ce qui concerne les intensités et longueurs d'ondes lumineuses) au cours de leur déplacement dans l'enceinte assuré au moyen dudit plateau tournant .According to another additional characteristic of the invention, said sources comprise tubes of sinuous shape, of different luminances and / or emitting different light spectra, placed end to end, for optimal exposure of the objects (with regard to the intensities and light wavelengths) during their movement in the enclosure provided by means of said turntable.
Selon encore une autre caractéristique supplémentaire de l'invention, la vitesse dudit plateau est réglable, afin de permettre l'ajustement de la durée d'exposition de chaque objet audit rayonnement lumineux entre le moment où on introduit l'objet dans l'enceinte et le moment où on le récupère .According to yet another additional characteristic of the invention, the speed of said plate is adjustable, in order to allow the adjustment of the duration of exposure of each object to said light radiation between the moment when the object is introduced into the enclosure and when we get it back.
Selon encore une autre caractéristique supplémentaire de l'invention, ledit appareil de photochimie est équipé de moyens permettant de faire varier le flux lumineux émis par lesdites sources .According to yet another additional characteristic of the invention, said photochemistry apparatus is equipped with means making it possible to vary the light flux emitted by said sources.
Selon encore une autre caractéristique supplémentaire de
l'invention, ledit appareil de photochimie comprend un capteur servant à mesurer 1 ' intensité lumineuse reçue par lesdits objets, et un dispositif électronique de régulation, de façon à pouvoir compenser automatiquement les variations de luminance des sources au cours de leur vie en modifiant la vitesse dudit plateau tournant ou l'alimentation électrique des sources lumineuses, ou les deux.According to yet another additional feature of the invention, said photochemistry apparatus comprises a sensor used to measure the light intensity received by said objects, and an electronic regulation device, so as to be able to automatically compensate for variations in luminance of sources during their life by modifying the speed of said turntable or the power supply of light sources, or both.
Enfin, selon encore une autre caractéristique supplémentaire de l'invention, ledit appareil de photochimie comprend un second plateau tournant, plus petit que le plateau tournant mentionné ci-dessus et monté sur ce dernier, et une source lumineuse supplémentaire au faisceau collimaté, destinée à des usages spéciaux, ainsi qu'une logique de commande, l'ensemble étant agencé de telle sorte que le grand plateau tournant puisse conduire le petit plateau tournant d'une position située face à ladite porte d'accès jusqu'à une position située face à ladite source lumineuse supplémentaire. D'autres avantages, buts et caractéristiques de l'invention ressortiront de la description ci-dessous du mode de réalisation préféré de l'invention, ladite description s ' appuyant sur les figures annexées dans lesquelles - la figure 1 est une vue en perspective d'un appareil de photochimie conforme à l'invention, etFinally, according to yet another additional characteristic of the invention, said photochemistry apparatus comprises a second turntable, smaller than the turntable mentioned above and mounted on it, and a light source additional to the collimated beam, intended for special uses, as well as a control logic, the assembly being arranged so that the large turntable can drive the small turntable from a position facing said access door to a position facing to said additional light source. Other advantages, aims and characteristics of the invention will emerge from the description below of the preferred embodiment of the invention, said description being based on the appended figures in which - Figure 1 is a perspective view of '' a photochemistry apparatus in accordance with the invention, and
- la figure 2 est une élévation latérale de l'appareil de photochimie illustré sur la figure 1.- Figure 2 is a side elevation of the photochemistry apparatus illustrated in Figure 1.
Comme on peut le voir sur les figures, l'appareil de photochimie selon l'invention est contenu dans un boîtier 1. Ce boîtier 1 est pourvu d'une porte 2 à ouverture facile donnant accès à une enceinte intérieure 5. Les objets à traiter (non représentés) sont posés sur un plateau tournant 3, et exposés à un rayonnement lumineux provenant d'une ou de plusieurs sources 4 qui sont disposées dans le haut de l'enceinte 5. La porte d'accès 2 est munie d'une vitre filtrante à travers laquelle on peut apercevoir les objets à traiter.
Au moins l'une de ces sources lumineuses 4 est constituée par un tube à cathode froide, qui a été choisi de manière à ce que le spectre du rayonnement qu'il émet excite au mieux la réaction photochimique mise en jeu. Au besoin, on peut facilement associer en série plusieurs tels tubes, chacun émettant un spectre de longueurs d'onde différent des autres tubes . Cette série de tubes peut être agencée en accord avec le mouvement circulaire des objets portés par le plateau tournant 3, de manière à ce que l'exposition à des longueurs d'onde déterminées se fasse dans un certain ordre préférentiel .As can be seen in the figures, the photochemistry apparatus according to the invention is contained in a housing 1. This housing 1 is provided with a door 2 with easy opening giving access to an interior enclosure 5. The objects to be treated (not shown) are placed on a turntable 3, and exposed to light radiation from one or more sources 4 which are arranged at the top of the enclosure 5. The access door 2 is provided with a filter glass through which you can see the objects to be treated. At least one of these light sources 4 is constituted by a cold cathode tube, which has been chosen so that the spectrum of the radiation which it emits best excites the photochemical reaction involved. If necessary, can easily combine several such tubes in series, each emitting a different wavelength spectrum from the other tubes. This series of tubes can be arranged in accordance with the circular movement of the objects carried by the turntable 3, so that the exposure to determined wavelengths takes place in a certain preferential order.
En cours d'utilisation, on introduit plusieurs objets à traiter dans l'enceinte 5, mais pas nécessairement ensemble. Avantageusement, chaque fois qu'un objet est prêt à être exposé au rayonnement lumineux, on ouvre la porte d'accès 2, ce qui commande automatiquement 1 ' interruption du mouvement du plateau tournant 3 ainsi que l'extinction des sources 4 ; on dépose ledit objet sur le plateau tournant 3 ; on referme la porte d'accès 2, ce qui, automatiquement, remet en route le plateau tournant 3 et rallume les sources 4. Un objet donné aura reçu une dose totale d'énergie lumineuse connue quand le plateau tournant 3 aura tourné d'un certain angle (ce que l'on apprécie en suivant des yeux le déplacement dudit objet) ; on ouvre alors la porte d'accès 2 pour le sortir de l'enceinte 5, et 1 ' on referme la porte d'accès 2, et ainsi de suite.In use, several objects to be treated are introduced into enclosure 5, but not necessarily together. Advantageously, each time an object is ready to be exposed to light radiation, the access door 2 is opened, which automatically controls the interruption of the movement of the turntable 3 as well as the extinction of the sources 4; said object is placed on the turntable 3; the access door 2 is closed, which automatically restarts the turntable 3 and turns on the sources 4. A given object will have received a total dose of light energy known when the turntable 3 has turned certain angle (which is appreciated by following the movement of said object with your eyes); the access door 2 is then opened to exit it from the enclosure 5, and 1 'the access door 2 is closed, and so on.
De préférence, on posera et reprendra chaque objet à l'endroit le plus commode, à savoir juste en face de la porte d'accès 2. Pour ce faire, il faut évidemment que le temps requis concernant l'exposition des objets au rayonnement corresponde à un nombre entier de tours du plateau tournant 3. Ceci est facile à régler quand l'appareil de photochimie est équipé d'une commande de vitesse de rotation dudit plateau tournant 3 (non représentée) .Preferably, each object will be placed and picked up in the most convenient place, namely just in front of the access door 2. To do this, it is obviously necessary that the time required for the exposure of objects to radiation corresponds at an integer number of turns of the turntable 3. This is easy to adjust when the photochemistry apparatus is equipped with a speed control for rotating said turntable 3 (not shown).
On a souvent affaire à des réactions photochimiques pour lesquelles il est avantageux de faire varier 1 ' intensité
lumineuse reçue au cours de l'exposition (de façon caractéristique, on requiert une intensité croissante) . De préférence donc, l'appareil de photochimie sera équipé d'un dispositif de commande de l'alimentation électrique des sources 4, afin de permettre un réglage de luminance approprié .We often deal with photochemical reactions for which it is advantageous to vary the intensity light received during the exposure (typically, increasing intensity is required). Preferably therefore, the photochemistry apparatus will be equipped with a device for controlling the power supply of the sources 4, in order to allow an appropriate luminance adjustment.
Pour être tout à fait certain que 1 ' intensité reçue par les objets à traiter sera bien celle prévue en dépit des variations possibles de luminance des sources 4 (principalement, une diminution due au vieillissement), on équipera de préférence l'appareil de photochimie d'un capteur d'intensité lumineuse (non représenté) placé dans l'enceinte 5. On pourra alors facilement compenser ces variations (du moins, jusqu'à la panne complète d'une source), en jouant sur l'alimentation électrique des sources 4, ou sur la vitesse de rotation du plateau tournant 3 (dont le ralentissement permettra une durée d'exposition accrue), ou sur les deux. Ce réglage compensatoire pourra se faire manuellement, ou mieux, automatiquement à l'aide d'un circuit logique adapté.To be completely certain that the intensity received by the objects to be treated will be that expected despite the possible variations in luminance of the sources 4 (mainly, a decrease due to aging), the photochemistry apparatus will preferably be equipped with 'a light intensity sensor (not shown) placed in the enclosure 5. We can then easily compensate for these variations (at least, until the complete failure of a source), by playing on the power supply of the sources 4, or on the speed of rotation of the turntable 3 (the slowing of which will allow an increased duration of exposure), or both. This compensatory adjustment can be done manually, or better, automatically using a suitable logic circuit.
Enfin, l'on a prévu dans le haut de l'enceinte 5 une source lumineuse supplémentaire 7, dont le faisceau, d'étendue restreinte, est dirigé vers l'arrière de l'enceinte 5 par rapport à la porte d'accès 2, afin que le rayonnement émis par ladite source 7 ne risque pas d'atteindre les utilisateurs de l'appareil de photochimie. Cette source supplémentaire 7 est utilisée pour des applications spéciales en matière de rayonnement. Par exemple dans le cas, décrit ci-dessus, de la fabrication de prothèses dentaires, cette source 7 est avantageusement constituée par une lampe halogène destinée au durcissement des matières opaques et à la cuisson de finition.Finally, an additional light source 7 has been provided at the top of the enclosure 5, the beam of which, of limited extent, is directed towards the rear of the enclosure 5 relative to the access door 2 , so that the radiation emitted by said source 7 does not risk reaching the users of the photochemistry apparatus. This additional source 7 is used for special radiation applications. For example in the case, described above, of the manufacture of dental prostheses, this source 7 is advantageously constituted by a halogen lamp intended for the hardening of opaque materials and for finishing baking.
Afin de pouvoir exposer un objet donné au rayonnement émis par ladite source supplémentaire 7, un second plateau tournant 6, plus petit que le premier plateau tournant 3, est monté sur ce dernier, le centre du second plateau tournant 6 étant placé approximativement au milieu d'un
7In order to be able to expose a given object to the radiation emitted by said additional source 7, a second turntable 6, smaller than the first turntable 3, is mounted on the latter, the center of the second turntable 6 being placed approximately in the middle of 'a 7
rayon du premier plateau tournant 3.radius of the first turntable 3.
En cours d'utilisation, on place un objet à traiter au moyen du rayonnement émis par la source supplémentaire 7, sur le petit plateau 6 alors que ce dernier stationne face à la porte d'accès ; on y place ledit objet ; après fermeture de la porte, grâce à un programme spécial que l'on a enclenché à cet effet, le grand plateau 3 tourne automatiquement d'un demi-tour de façon à amener le petit plateau tournant 6 en face du faisceau lumineux émis par la source supplémentaire 7. Arrivé à la bonne position, le petit plateau 6 vient en prise avec un engrenage qui le fait tourner sur lui-même pour permettre une exposition uniforme dudit objet audit rayonnement spécial. A la fin du temps d'exposition imparti, on récupère ledit objet en faisant effectuer à nouveau un demi-tour au grand plateau 3.In use, an object to be treated is placed by means of the radiation emitted by the additional source 7, on the small tray 6 while the latter is stationed facing the access door; said object is placed there; after closing the door, thanks to a special program that has been started for this purpose, the large plate 3 automatically rotates by half a turn so as to bring the small rotating plate 6 opposite the light beam emitted by the additional source 7. Arrived at the right position, the small plate 6 engages with a gear which makes it rotate on itself to allow a uniform exposure of said object to said special radiation. At the end of the allocated exposure time, the said object is recovered by having the large plate 3 turn again.
On notera que cet usage d'une lampe halogène à des fins particulières a pour conséquence qu'elle est en pratique sollicitée peu souvent par comparaison avec les dispositifs connus, dans lesquels les lampes halogènes servent à tous les besoins. En conséquence, l'invention permet de fabriquer un grand nombre d'objets avant que l'on ait à remplacer la lampe halogène .It will be noted that this use of a halogen lamp for specific purposes has the consequence that it is rarely used in practice by comparison with known devices, in which the halogen lamps serve all needs. Consequently, the invention makes it possible to manufacture a large number of objects before the halogen lamp has to be replaced.
On a présenté ci-dessus le mode de réalisation préféré de l'invention pour servir d'exemple illustrant les principes de la présente invention, mais il est bien clair que l'homme de l'art pourra s'en servir pour réaliser d'autres variantes d'appareils de photochimie sans pour autant sortir de l'invention. Par exemple, il peut s'avérer utile pour certaines applications de disposer de diverses sources lumineuses supplémentaires 7, plutôt que d'une seule, et/ou de plusieurs petits plateaux 6.The preferred embodiment of the invention has been presented above to serve as an example illustrating the principles of the present invention, but it is clear that a person skilled in the art can use it to carry out other variants of photochemistry devices without departing from the invention. For example, it may prove useful for certain applications to have various additional light sources 7, rather than just one, and / or several small plates 6.
Comme l'appareil de photochimie selon l'invention utilise principalement des tubes à cathode froide, un avantage supplémentaire de l'invention consiste en ce que la température de l'enceinte reste modérée ; comme expliqué ci- dessus, cet avantage est appréciable.As the photochemistry apparatus according to the invention mainly uses cold cathode tubes, an additional advantage of the invention consists in that the temperature of the enclosure remains moderate; as explained above, this advantage is appreciable.
De plus, il est à souligner que l'appareil de
photochimie selon l'invention - et ce, contrairement aux appareils selon l'art antérieur utilisant des tubes à décharge dans le xénon - ne présente aucun danger pour les utilisateurs.
In addition, it should be noted that the photochemistry according to the invention - and this, unlike the devices according to the prior art using xenon discharge tubes - does not present any danger for users.
Claims
9 REVENDICATIONS 1.- Appareil de photochimie, notamment pour la réalisation de prothèses dentaires, comportant au moins une source lumineuse (4) enfermée dans une enceinte (5) où l'on place des objets au sein desquels on souhaite mettre en œuvre des réactions photochimiques, caractérisé en ce que l'une au moins desdites sources lumineuses (4) consiste en un tube à cathode froide muni d'un revêtement luminescent, la nature de ce dernier étant choisie en fonction des applications envisagées pour ledit appareil.9 CLAIMS 1.- Photochemistry apparatus, in particular for the production of dental prostheses, comprising at least one light source (4) enclosed in an enclosure (5) where objects are placed within which one wishes to carry out reactions photochemical, characterized in that at least one of said light sources (4) consists of a cold cathode tube provided with a luminescent coating, the nature of the latter being chosen according to the applications envisaged for said apparatus.
2.- Appareil de photochimie selon la revendication 1, caractérisé en ce qu'il comprend des moyens (2,3) permettant d'exposer lesdits objets au rayonnement émis par lesdites sources lumineuses (4) au fur et à mesure de la préparation desdits objets en vue dudit traitement photochimique.2.- photochemistry apparatus according to claim 1, characterized in that it comprises means (2,3) for exposing said objects to the radiation emitted by said light sources (4) as and when preparing said objects for said photochemical treatment.
3.- Appareil de photochimie selon la revendication 2, caractérisé en ce que lesdits moyens (2,3) sont constitués par une porte d'accès (2) et un plateau tournant (3) sur lequel on pose lesdits objets, ledit plateau (3) s ' arrêtant de tourner et lesdites sources lumineuses (4) s ' éteignant automatiquement tant que ladite porte d'accès (2) est ouverte .3.- Photochemistry apparatus according to claim 2, characterized in that said means (2,3) consist of an access door (2) and a turntable (3) on which said objects are placed, said plate ( 3) stopping to rotate and said light sources (4) automatically turning off as long as said access door (2) is open.
4.- Appareil de photochimie selon la revendication 3, caractérisé en ce que lesdites sources lumineuses (4) comprennent des tubes de forme sinueuse, de luminances différentes et/ou émettant des spectres lumineux différents, mis bout à bout, pour une exposition optimale desdits objets, en ce qui concerne les intensités et longueurs d'ondes lumineuses, au cours de leur mouvement circulaire dans ladite enceinte (5) assuré au moyen dudit plateau tournant ( 3 ) .4. A photochemistry apparatus according to claim 3, characterized in that said light sources (4) comprise tubes of sinuous shape, of different luminances and / or emitting different light spectra, placed end to end, for optimal exposure of said objects, as regards the light intensities and wavelengths, during their circular movement in said enclosure (5) provided by means of said turntable (3).
5.- Appareil de photochimie selon la revendication 3, caractérisé en ce qu'il est équipé de moyens permettant de faire varier la vitesse de rotation dudit plateau tournant (3).5.- Photochemistry apparatus according to claim 3, characterized in that it is equipped with means for varying the speed of rotation of said turntable (3).
6.- Appareil de photochimie selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est équipé de moyens permettant de faire varier le flux lumineux
10 émis par lesdites sources (4) .6.- photochemistry apparatus according to any one of the preceding claims, characterized in that it is equipped with means for varying the light flux 10 issued by said sources (4).
7.- Appareil de photochimie selon la revendication 5, caractérisé en ce que ledit appareil de photochimie comprend un capteur servant à mesurer l'intensité lumineuse reçue par lesdits objets, et un dispositif électronique de régulation, de façon à pouvoir compenser automatiquement les variations de luminance desdites sources (4) au cours de leur vie en modifiant la vitesse dudit plateau tournant (3) .7. A photochemistry apparatus according to claim 5, characterized in that said photochemistry apparatus comprises a sensor used to measure the light intensity received by said objects, and an electronic regulation device, so as to be able to automatically compensate for variations in luminance of said sources (4) during their life by modifying the speed of said turntable (3).
8.- Appareil de photochimie selon la revendication 6, caractérisé en ce que ledit appareil de photochimie comprend un capteur servant à mesurer l'intensité lumineuse reçue par lesdits objets, et un dispositif électronique de régulation, de façon à pouvoir compenser automatiquement les variations de luminance desdites sources (4) au cours de leur vie en modifiant l'alimentation électrique desdites sources lumineuses (4) .8. A photochemistry apparatus according to claim 6, characterized in that said photochemistry apparatus comprises a sensor used to measure the light intensity received by said objects, and an electronic regulation device, so as to be able to automatically compensate for variations in luminance of said sources (4) during their life by modifying the power supply of said light sources (4).
9.- Appareil de photochimie selon les revendications 5 et 6, caractérisé en ce que ledit appareil de photochimie comprend un capteur servant à mesurer 1 ' intensité lumineuse reçue par lesdits objets, et un dispositif électronique de régulation, de façon à pouvoir compenser automatiquement les variations de luminance desdites sources (4) au cours de leur vie en modifiant à la fois la vitesse dudit plateau tournant (3) et l'alimentation électrique desdites sources lumineuses (4) .9. A photochemistry apparatus according to claims 5 and 6, characterized in that said photochemistry apparatus comprises a sensor used to measure the light intensity received by said objects, and an electronic regulation device, so as to be able to automatically compensate for the variations in luminance of said sources (4) during their life by modifying both the speed of said turntable (3) and the power supply of said light sources (4).
10.- Appareil de photochimie selon la revendication 3, caractérisé en ce que ledit appareil de photochimie comprend en outre un ou plusieurs plateaux tournants supplémentaires (6), plus petits que le premier plateau tournant (3) et montés sur ce dernier, et une ou plusieurs sources lumineuses supplémentaires (7) au faisceau collimaté, destinées à des réactions photochimiques spéciales, ainsi qu'une logique de commande, l'ensemble étant agencé de telle sorte que le grand plateau tournant (3) puisse conduire chaque petit plateau tournant (6) d'une position située face à ladite porte d'accès (2) jusqu'à une position située face à la source supplémentaire (7) requise pour l'une desdites réactions photochimiques spéciales.
10.- Photochemistry apparatus according to claim 3, characterized in that said photochemistry apparatus further comprises one or more additional turntables (6), smaller than the first turntable (3) and mounted on the latter, and a or several additional light sources (7) to the collimated beam, intended for special photochemical reactions, as well as a control logic, the assembly being arranged so that the large turntable (3) can drive each small turntable ( 6) from a position situated opposite said access door (2) to a position situated opposite the additional source (7) required for one of said special photochemical reactions.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000530163A JP2002502628A (en) | 1998-02-09 | 1999-02-09 | Photochemical equipment especially for making dental prostheses |
| EP99902623A EP1054643A1 (en) | 1998-02-09 | 1999-02-09 | Photochemical apparatus, in particular for producing dental prostheses |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9801476A FR2774607B1 (en) | 1998-02-09 | 1998-02-09 | PHOTOCHEMISTRY APPARATUS, PARTICULARLY FOR THE PRODUCTION OF DENTAL PROSTHESES |
| FR98/01476 | 1998-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1999039657A1 true WO1999039657A1 (en) | 1999-08-12 |
Family
ID=9522728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1999/000276 WO1999039657A1 (en) | 1998-02-09 | 1999-02-09 | Photochemical apparatus, in particular for producing dental prostheses |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1054643A1 (en) |
| JP (1) | JP2002502628A (en) |
| FR (1) | FR2774607B1 (en) |
| WO (1) | WO1999039657A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001010336A1 (en) | 1999-08-06 | 2001-02-15 | Arnaud Delahaye | Method and apparatus for the photopolymerization of a mass for reconstructing a dental prosthesis |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2098439A (en) * | 1981-04-27 | 1982-11-17 | G C Dental Ind Corp | Apparatus for curing resin films coated on dental resin prosthesis |
| FR2525470A1 (en) * | 1982-04-27 | 1983-10-28 | Kreitmair Albert | IRRADIATION APPARATUS FOR DENTAL PROSTHESES |
| DE8619780U1 (en) * | 1986-07-23 | 1986-10-09 | Heynold, Wolfgang, 6000 Frankfurt | Device for light-curing dental prostheses |
| DE8627655U1 (en) * | 1986-10-16 | 1987-02-26 | Schuetz-Dental Gmbh, 6365 Rosbach, De | |
| WO1992003104A1 (en) * | 1990-08-13 | 1992-03-05 | Welch Allyn, Inc. | Dental curing lamp and apparatus |
| DE9402179U1 (en) * | 1994-02-09 | 1994-08-18 | Bcl Lichttechnik Inh Claudia C | Device for light curing plastic objects |
-
1998
- 1998-02-09 FR FR9801476A patent/FR2774607B1/en not_active Expired - Fee Related
-
1999
- 1999-02-09 JP JP2000530163A patent/JP2002502628A/en not_active Withdrawn
- 1999-02-09 WO PCT/FR1999/000276 patent/WO1999039657A1/en not_active Application Discontinuation
- 1999-02-09 EP EP99902623A patent/EP1054643A1/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2098439A (en) * | 1981-04-27 | 1982-11-17 | G C Dental Ind Corp | Apparatus for curing resin films coated on dental resin prosthesis |
| FR2525470A1 (en) * | 1982-04-27 | 1983-10-28 | Kreitmair Albert | IRRADIATION APPARATUS FOR DENTAL PROSTHESES |
| DE8619780U1 (en) * | 1986-07-23 | 1986-10-09 | Heynold, Wolfgang, 6000 Frankfurt | Device for light-curing dental prostheses |
| DE8627655U1 (en) * | 1986-10-16 | 1987-02-26 | Schuetz-Dental Gmbh, 6365 Rosbach, De | |
| WO1992003104A1 (en) * | 1990-08-13 | 1992-03-05 | Welch Allyn, Inc. | Dental curing lamp and apparatus |
| DE9402179U1 (en) * | 1994-02-09 | 1994-08-18 | Bcl Lichttechnik Inh Claudia C | Device for light curing plastic objects |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001010336A1 (en) | 1999-08-06 | 2001-02-15 | Arnaud Delahaye | Method and apparatus for the photopolymerization of a mass for reconstructing a dental prosthesis |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2774607B1 (en) | 2000-04-21 |
| EP1054643A1 (en) | 2000-11-29 |
| FR2774607A1 (en) | 1999-08-13 |
| JP2002502628A (en) | 2002-01-29 |
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