WO2017071804A1

WO2017071804A1 - Innovative method for mounting a ceramic on a framework

Info

Publication number: WO2017071804A1
Application number: PCT/EP2016/001775
Authority: WO
Inventors: Lionel MARSLEN
Original assignee: Marslen Lionel
Priority date: 2015-10-26
Filing date: 2016-10-26
Publication date: 2017-05-04
Also published as: FR3042701B1; FR3042700A1; FR3042701A1

Abstract

A method for mounting a ceramic on a framework using a brush which is an integral part of a device allowing the bristles of the brush to be impregnated continuously and which comprises a main body housing a reservoir containing a liquid for wetting the ceramic and comprising, fixed to one of its ends, a plurality of bristles forming a brush assembled around and in direct contact with a core that guides the liquid for wetting the ceramic passing through the main body towards the reservoir and allowing this liquid to be transferred by a capillary effect from the reservoir to the bristles of the brush.

Description

INNOVATIVE METHOD OF MOUNTING A CERAMIC ON A REINFORCEMENT

The present patent application claims the priority of the French patent application FR 15/02257 filed on October 26, 2015 and the French patent application FR 16/00687 filed on April 26, 2016, which are incorporated herein by reference.

Field of the invention

The present invention relates to an innovative method of mounting cosmetic ceramics on a frame.

State of the prior art

Ceramics are now used for a long time in the field of dental implantology. This attraction for these materials resides, at the same time, in the possibility of obtaining a very satisfactory mechanical resistance, while benefiting from a very good biocompatibility. In addition, it is now possible to obtain ceramics with an aspect approaching closer to that of teeth.

The technique used today for the production of a dental prosthesis consists first and foremost in the manufacture of a suitable armature which can be made of a variety of materials ranging from metal (eg alumina) to magnesium oxide spinels and aluminum, up to ceramics based on zirconia (zirconium oxide).

This frame is then dressed so as to adapt closer to the patient. To do this, a so-called cosmetic or coloring ceramic is applied to the latter, which is in the form of a powder and which, after cooking, will give the whole an appearance approaching as close as possible to that of the initial tooth.

Now, we can apply on it a varnish or frosting for a better rendering. As regards more specifically the cosmetic ceramic, it is not applied dry and directly.

It is first necessary to take this ceramic which is in powder form in its packaging, to place the desired amount on a glass plate (called mixing plate). After wetting, the raw paste obtained is then applied to the frame with a brush whose hold must be perfect to place this mass of ceramic with the greatest precision. European patent application EP 0 154 137 A1 illustrates such a method of the prior art of mounting a ceramic on an armature using a brush.

To obtain the desired rendering (the right shade), we must apply different successive layers of ceramics, we speak of stratification. To dehydrate and cook this ceramic, it is necessary to pass the whole oven to a temperature of about 900 ° C and for about twenty minutes (temperatures and cooking time naturally vary depending on the ceramic used). This cooking can take place in one or more steps parallel to the stratification.

If the principle of application and work of this ceramic ^cos' métique may seem simple, obtaining a perfect rendering requires the dexterity and experience of potters.

One of the first difficulties lies in the texture of the raw dough. Because of its mineral and granular nature, it dries quickly, which complicates the lamination operation. It is therefore necessary to rehydrate regularly. Now, this rehydration, if it is poorly controlled, resulted in a raw dough difficult to mount.

To try to overcome this difficulty, it has been developed plates to maintain the humidification of powders without operator intervention such as the WET'N'DRY CLASSIC or the WET'N'DRY EVO 3 of SMILE LINE.

Now, this solution is imperfect to the extent that this paste is applied by means of a brush which, in contact with this paste and by its nature, will also help to vary its hygrometry and therefore its consistency. It is therefore necessary to regularly humidify the brush used sufficiently to allow it to absorb the desired ceramic mass and that it has the right consistency, but not too much to prevent this mass disintegrates and complicate its assembly. Also, it is therefore again necessary to ensure, during this stratification, to maintain the degree of humidity of the brush at the right level which requires all the experience of the ceramist.

Thus, there is a need to simplify the work of the operator while providing a perfect rendering for the implant.

Detailed description of the invention

The inventor has now realized that by using, not a traditional brush, but a Japanese calligraphy brush incorporating a reservoir of internal liquid and known for a long time, it was possible to maintain a perfect hygrometry of the brush and so ceramic masses so to ensure a perfect and homogeneous assembly of the latter on the frame. By way of example of such a brush, mention may be made of the device described in patent application FR 1 146 259 A1 dating back nearly 60 years.

In addition, this solution proved to be so effective that it was possible to dispense with the humidification step on a mixing plate and to go directly from the removal of the ceramic from its container to its mounting on the frame. The inventor has therefore succeeded in obtaining a new method of mounting a ceramic on a frame much more efficient by having the presence of mind to reformulate the problematic of such a method as it was envisaged until then. Thus, the inventor by no longer focusing on the hydration of the ceramic as such, as was the case until then, but by addressing it through the hydration of the brush used for its application, has It has been possible to identify the party using a device older than 60 years in a process known for more than 30 years to gain considerably in efficiency.

With this teaching, the present invention thus proposes a method of mounting a ceramic comprising a step of mounting a ceramic on a frame with a brush characterized in that the brush used during this step of mounting said method is an integral part of a device for impregnating the bristles of the brush continuously and comprising:

- a main body housing a reservoir containing a hydration liquid of the ceramic and comprising, fixed at one of its ends, a plurality of bristles forming a brush,

which plurality of bristles is assembled in direct contact, and preferably around a guiding core of the hydration liquid of the ceramic passing through the main body towards the reservoir and allowing the capillary transfer of this liquid from the reservoir to the bristles. of the brush.

The main body takes the form of a sleeve and is intended to facilitate the gripping of the device by the ceramist. This main body can be made of an opaque or transparent material. This main body houses a reservoir of liquid formed therein or distinct, which reservoir can then take the form of a cartridge. The main body is advantageously formed of two parts or more, which parts may disassociate so as to access the reservoir (or cartridge).

With regard to the hydration fluid of ceramics, the simplest is to use water. Now there are other liquids with improved properties that are available on the market such as SMILE LINE's U-mid Liquid ADVANCED or HPDENT's Cerafin Liquid.

As for the bristles forming the brush, it may be natural or synthetic bristles (for example nylon) or a mixture of both.

The device used in the method according to the invention may comprise means for varying the exposed length of the bristles of the brush. This means may further allow to vary the shape of the brush from the conical shape to the flat oval. Such a means may slide relative to the main body and have, at its end, an opening of conical or ovoid shape depending on the shape that it is desired to give the brush.

As regards this time the guiding core, that is made of porous material so as to allow the capillary transfer of the liquid from the reservoir to the brush, and this while helping to contain it in the reservoir.

Typically, this guiding core is made from synthetic fibers extending longitudinally parallel to each other and secured to each other by a liquid synthetic resin so that they retain their flexibility and leave between them fine passages Communication. This guide core may be made from a fibrous material such as felt, nonwoven fabric, etc. Now, this guide core can also take the form of a sintered granular synthetic resin in the form of a tapered rod. The choice of the material for the guiding core can be made according to the nature of the liquid contained in the reservoir, with a porosity all the higher for the latter that the liquid in question will be of a high viscosity. For such viscous liquids (especially for the staining and / or glazing steps), it will also be possible to add an opening in the guiding core. In addition to its function of impregnating the bristles of the brush, the guiding core can also, when the bristles are assembled around it, help to maintain the brush by its rigidity.

According to a particular embodiment, the device used in the process according to the invention may comprise, ^'further comprising means for selecting, see modulate the degree of impregnation of the bristles of the device by the liquid contained in the reservoir . To do so, such means will adapt or even modulate the contact surface between the guide core and the liquid contained in the reservoir. For example, such a means may allow to adjust and modulate the depression of the guide core in the reservoir and therefore in the liquid contained therein (see left image of Figure 4); which means can then take the form of a ring enclosing the guide core (and sealing) but allowing its sliding.

By way of example, such a means may make it possible to mask part of the surface of the guide core present in the reservoir; which means may take the form of an envelope, perforated or not, applying on this surface. It is then possible to envisage being able to adjust the grip of this envelope on the surface of the guiding core present in the reservoir (see image on the left of Figure 4) or to use interchangeable envelopes, benefiting from different openings and thus adjust, by changing the envelope, the surface of the guide core in contact with the liquid of the tank. The reservoir may comprise, advantageously at its end opposite to that allowing penetration of the guide means, a means of venting. Such means, taking the form for example of an opening or a valve, is intended to allow air to enter the tank as the hydration liquid is released by the guiding means to the bristles of the brush, while preventing the liquid from passing through it. According to an advantageous embodiment, this venting means is activatable by the ceramist, so as to initiate or regulate the flow of liquid transfer by capillarity of the reservoir to the bristles of the brush.

As for ceramics, the aim is a cosmetic ceramic par excellence. Such a cosmetic ceramic consists of a material composed of clay-siliceous mineral bodies and metal oxides and is used for the manufacture of artificial teeth.

As for the frame, it is preferably a dental frame, which may be made of metal, ceramic or any other suitable material. Typically a metal frame may take the form of an alumina frame, while one can choose a zirconia frame for a ceramic frame.

Advantageously, the method according to the invention uses this same device for taking the ceramic in its container.

Advantageously, the method according to the invention does not include a step of applying the ceramic to a so-called mixing plate. Previously, this step was aimed at humidifying the ceramic.

Naturally, the process according to the invention will also comprise one or more stages of cooking / dehydration of said ceramic. The method according to the invention may further comprise a staining step. Such a step corresponds to a step of applying dyes (pigments and / or metal oxides) to the ceramic.

For the application of this coloration, it is possible to use the device described above, which device is then filled with a suitable liquid such as E-MAX GLAZE AND STAIN LIQUID (IVOCLAR VIVADENT).

The method according to the invention may comprise a glazing step. Such a step corresponds in a certain way to the finish of the ceramic and comprises a final vitrification firing of the surface of the crown, which firing is preceded by the application of a glaze.

For the application of this glaze, it is again possible to use the device described above, which device is then filled with a suitable liquid such as NORATIAKE ES LIQUID (NORITAKE) OR E-MAX GLAZE AND STAIN LIQUID (IVOCLAR VIVADENT).

For example, we can use calligraphy brushes with reservoir, which brushes are rechargeable or not, preferably refillable. Therefore, the ink (of china in general) will be replaced by water, a liquid of hydration of the ceramic, or liquids adapted to the application of dyes and glazes. Such brushes are available in particular at LEONARD (ref 5530RO, 5535RO and 60RO).

Advantageously, the device may comprise a cap (cap) for covering the bristles of the brush which avoids, or limits, their dehydration in the absence of use.

A second object of the invention relates to the use of a device as described above for mounting a ceramic on a frame. Such a device is preferably a calligraphy brush receiving a ^reservoir, wherein calligraphy brush is rechargeable or not. Preferably, the used reservoir calligraphy brush is refillable.

Advantageously, such use also aims to take the ceramic directly into its container.

Advantageously, such a use makes it possible to avoid the application of the ceramic on a so-called mixing plate.

Other characteristics, details and advantages of the invention will emerge more clearly from the detailed description given below as an indication in relation to drawings in which:

- Figure 1 schematically shows a device as used for mounting ceramic on a frame. Figure 2 shows an example of a rechargeable calligraphy brush.

- Figure 3 shows a second venting means associated with the reservoir of the device.

FIG. 4 shows two examples of means making it possible to choose, or even to modulate, the degree of impregnation of the bristles of the device by the liquid contained in the reservoir.

As illustrated in FIG. 1, the device 1 for mounting ceramic on an armature comprises, at one of its ends, a plurality of bristles forming a brush 2.

The device 1 figured further comprises a movable means 3 allowing the ceramist (operator) to vary the exposed length of the bristles of the brush. Typically, this mobile means 3 is a piece of silicone, which is movable relative to the main body For the device 1 shown, the main body 5 which takes the form of a sleeve for the ceramist consists of two parts 5a and 5b, which are secured together by means of a thread 7. Once assembled, these two parts 5a and 5b, form a reservoir 6 for the hydration liquid of the ceramic, whose slenderness is ensured by the thread 7 and by a seal 8. The threading 7 allows the operator to open the device so fill the tank 6.

The bristles of the brush 2 are assembled around and in direct contact with a core 4 for guiding the hydration liquid of the ceramic made of porous material. This core 4 passes through the main body 5 (a) to the reservoir 6 and allows the capillary transfer of this liquid from the reservoir 6 to the bristles of the brush 2. As shown, this guiding core 4 makes it possible to maintain the brush hair 2.

The device 1 further comprises a venting means 9 (9a and 9b) of the tank 6, which takes the form of an air inlet 9a towards the tank 6, the opening of which is conditioned by a valve of shutter 9b actuated by the ceramist and closed at rest by a spring. This device allows the ceramist to control the humidification of the bristles of the brush.

FIG. 2 shows an example of a brush with a tank marketed and usable in the process according to the invention.

FIG. 3 shows another venting means 9 (9a and 9b) of the tank 6, which takes the form of an opening 9a in the tank 6, the opening of which is closed by a closing means 9b taking the shape of a ball coupled to a spring. A dry movement down the device by the ceramist allows the entry of air into the tank and release the moistening liquid of the ceramic towards the bristles of the brush.

FIG. 4 shows various means 10 for selecting, or even modulating, the degree of impregnation of the bristles of the device by the liquid contained in the reservoir with, for the left view, a ring enclosing the guide core (and sealing) but allowing its sliding and, for the right view, an envelope applying to the surface of the guide core whose grip is adjusted by a guide coupled to a wheel.

Claims

1. A method of mounting a ceramic comprising a step of mounting a ceramic on a frame with a brush, characterized in that the brush used during this step of mounting said method is an integral part of a device permitting the impregnation of the bristles of the brush in a continuous manner and comprising: a main body housing a reservoir containing a hydration liquid of the ceramic and comprising, fixed at one of its ends, a plurality of bristles forming a brush , which plurality of bristles is assembled in direct contact, and preferably around, a guiding core of the hydration liquid of the ceramic passing through the main body towards the reservoir and allowing the capillary transfer of this liquid from the reservoir to the bristles of the brush.

2. The method of claim 1, characterized in that the frame is a dental frame.

3. The process according to claim 2, characterized in that the ceramic is a cosmetic ceramic-

4. The method according to any one of claims 1 to 3, characterized in that the step of sampling the ceramic in its container is performed with the same device.

5. The method according to any one of claims 1 to 4, characterized in that it does not include a step of applying the ceramic on a so-called mixing plate.

6. The method according to any one of claims 1 to 5, characterized in that the device used during the step of the mounting step of said method further comprises means for selecting, or modulating, the degree of impregnation of the hair of the device by the liquid contained in the reservoir.

7. The method according to any one of claims 1 to 6, characterized in that the main body houses a liquid reservoir formed therein or distinct, which reservoir can then take the form of a cartridge.

8. The method according to any one of the preceding claims, characterized in that said device is a calligraphy brush with reservoir, rechargeable or not, preferably rechargeable.

9. A use, for mounting a ceramic on a frame, of a device comprising: a main body housing a reservoir containing a hydration liquid of the ceramic,

a plurality of bristles forming a brush and fixed at one of the ends of the main body, which plurality of bristles are assembled in direct contact, and preferably around, a guiding core of the hydration liquid of the ceramic traversing the main body towards the reservoir and allowing the capillary transfer of this liquid from the reservoir to the bristles of the brush.

10. The use according to claim 9, characterized in that it also aims to take the ceramic directly into its container.