CA1258557A - Basal ceramic layer for opacifying the metal coping of a ceramo-metallic dental reconstruction - Google Patents
Basal ceramic layer for opacifying the metal coping of a ceramo-metallic dental reconstructionInfo
- Publication number
- CA1258557A CA1258557A CA000474154A CA474154A CA1258557A CA 1258557 A CA1258557 A CA 1258557A CA 000474154 A CA000474154 A CA 000474154A CA 474154 A CA474154 A CA 474154A CA 1258557 A CA1258557 A CA 1258557A
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- Prior art keywords
- weight
- glass frit
- approximately
- microns
- ceramic layer
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/02—Frit compositions, i.e. in a powdered or comminuted form
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/15—Compositions characterised by their physical properties
- A61K6/16—Refractive index
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/15—Compositions characterised by their physical properties
- A61K6/17—Particle size
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/20—Protective coatings for natural or artificial teeth, e.g. sealings, dye coatings or varnish
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
- A61K6/816—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising titanium oxide
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
- A61K6/818—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/831—Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon
- A61K6/833—Glass-ceramic composites
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/84—Preparations for artificial teeth, for filling teeth or for capping teeth comprising metals or alloys
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/24—Fusion seal compositions being frit compositions having non-frit additions, i.e. for use as seals between dissimilar materials, e.g. glass and metal; Glass solders
Landscapes
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Plastic & Reconstructive Surgery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
- Dental Preparations (AREA)
- Dental Prosthetics (AREA)
- Ceramic Products (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Laminated Bodies (AREA)
Abstract
PATENT
BASAL CERAMIC LAYER FOR OPACIFYING THE METAL COPING OF A
CERAMO-METALLIC DENTAL RECONSTRUCTION
SUISSOR S.A.
Inventor: Michel HEURTAUX
ABSTRACT
The present invention relates to a ceramic basal layer for opacifying the metal coping of a ceramo-metallic dental reconstruction.
The ceramic basal layer for opacifying the metal coping of a ceramo-metallic dental reconstruction consists of an undercoat of opaque slip produced from a glass frit high in fluxes and in particular in B2O3, covered with an opaque layer produced from a glass frit high in opaci-fying metal oxides and containing approximately 30 % by weight of refractory particles with a particle size of between approximately 40 microns and approximately 100 microns.
BASAL CERAMIC LAYER FOR OPACIFYING THE METAL COPING OF A
CERAMO-METALLIC DENTAL RECONSTRUCTION
SUISSOR S.A.
Inventor: Michel HEURTAUX
ABSTRACT
The present invention relates to a ceramic basal layer for opacifying the metal coping of a ceramo-metallic dental reconstruction.
The ceramic basal layer for opacifying the metal coping of a ceramo-metallic dental reconstruction consists of an undercoat of opaque slip produced from a glass frit high in fluxes and in particular in B2O3, covered with an opaque layer produced from a glass frit high in opaci-fying metal oxides and containing approximately 30 % by weight of refractory particles with a particle size of between approximately 40 microns and approximately 100 microns.
Description
1~ 5~557 The present invention relates to the technical field of ceramo-metallic dental reconstructions. It re-lates more particularly to the composition of ceramic glass employed to produce various types of dental recon-structions, such as crowns, inlays, bridges, and the like.
Dental reconstructions of this type are usuallyproduced from a series of ceramic layers covering a metal coping, for example laid on the stump of a tooth reduced after shaping with the drill. This series of ceramic layers consists of 3 basal opacifying layer, two inter-mediate layers known under the terms of "dentine'' and "incisal"~ and a transparent surface layer intended to resemble the gleam of the enamel of the natural tooth.
The subject of the present invention is aimed more especially at the basal ceramic layer for opaci-fying the metal coping of such a dental reconstruction.
As its name indicates, such a layer is mainly intended to hide the metallic appearance of the supporting coping. It is therefore essential to give it good opaci-fying properties. However, this is not enough. In fact,to obtain good mechanical strength and good fracture toughness of the prosthesis, it is essential to ensure perfect bonding of the opaque ceramic layer to the metal coping. The various solutions proposed hitherto do not produce a satisfactory adhesion in practice.
The aim of the present invention was precisely to develop an opaque dental ceramic which, in addition to its improved adhesive properties, is endowed with an out-standing opacifying power. This layer according to the ~e
Dental reconstructions of this type are usuallyproduced from a series of ceramic layers covering a metal coping, for example laid on the stump of a tooth reduced after shaping with the drill. This series of ceramic layers consists of 3 basal opacifying layer, two inter-mediate layers known under the terms of "dentine'' and "incisal"~ and a transparent surface layer intended to resemble the gleam of the enamel of the natural tooth.
The subject of the present invention is aimed more especially at the basal ceramic layer for opaci-fying the metal coping of such a dental reconstruction.
As its name indicates, such a layer is mainly intended to hide the metallic appearance of the supporting coping. It is therefore essential to give it good opaci-fying properties. However, this is not enough. In fact,to obtain good mechanical strength and good fracture toughness of the prosthesis, it is essential to ensure perfect bonding of the opaque ceramic layer to the metal coping. The various solutions proposed hitherto do not produce a satisfactory adhesion in practice.
The aim of the present invention was precisely to develop an opaque dental ceramic which, in addition to its improved adhesive properties, is endowed with an out-standing opacifying power. This layer according to the ~e
- 2 ~ 58557 invention moreover has, after being baked, a rough surface quality responsible for good light scatter, which makes it possible to avoid any unpleasant reflection effect of the prosthesis which, for this reason, would not truly restore the appearance of the natural tooth.
It should be noted, moreover, that, as a result of the better opacifying power, the dental ceramic according to the invention can be applied as a thinner layer, which leaves more space available for applying the following coats, nhich thus become easier to mold by the prosthetist.
Furthermore, the opaque dental ceramic composition according to the invention has been adapted to conform in expansion with its adjacent layers, and in particular with ;ts metal support. This compatibility is further consid-erably facilitated by its better opacity, which permits itto be deposited as a thinner layer.
The present invention which makes it possible to reconcile, on the one hand, the adhesion and, on the other hand, the opacity of this type of ceramic layer, springs from the parent concept based on separating into two distinct layers the single opaque layer usually employed in the prior art. The first undercoat, called "opaque slip", in direct contact with the reinforcement, is in-tended to contribute good adhesion to the metal, while the other layer, referred to as "opaque", has been designed to contribute the sufficient degree of opacity.
In accordance with the ?resent invention, the basal ceramic layer for opacifying the metal coping of a ceramo-metallic dental reconstruction consists of an _ 3 ~ 8S57 undercoat of opaque slip obtained from a glass frit high in fluxes and in particular in ~23' covered with an opaque layer obtained from a glass frit high in opacifying metal oxides and contain;ng approximately 30% by weight of refractory particles with a particle size of between approxi-mately 40 microns and approximately 100 microns.
Other features and advantages of the present in-vention will become apparent from the reading of the de-tailed description which follows, relying particularly on individual examples of application, which are given simply as illustrations.
The glass frit which is high in fluxes and inten-ded to form the undercoat of opaque slip in contact with the metal coping, advantageously contains approximately 8 to approximately 14 X by weight, and preferably from approximately 9 to approximately 11 X by weight, of 8203.
It is precisely this high content of boron oxide which makes it possible to improve the metal adhesion capacity of this undercoat of opaque slip. It should be noted, however, that ~23 contents above approximately 14 %
by weight would result in glass frits which cannot be used in practice, since they would become too readily melted. In fact, an undercoat of opaque slip must not have melting temperatures which are too low, since its melting temperature must in any event remain above those of the following top layers which are laid down and subse-quently heat-stabilized.
Insofar as the opaque layer as such is concerned, this of course contains opacifying agents such as tin oxide, titanium oxide and zirconium oxide, in a high con-centration. However, the opacifying capacity of this layer is considerably increased by the presence of a high proportion (of the order of 30 ~ by weight) of relatively large refractory particles, that is to say with a particle size of between approximately 40 and approximately 100 mi-crons. The presence of these refractory particles of relatively large sizes produces, after baking, a roughness in the surface of this opaque layer wh;ch contributes an effect of light scatter through the more translucent upper layers and thus improves the effect of tooth "depth".
Two examples of composition of glass frits inten-ded for producing an undercoat of opaque slip and an opaque layer are given below by way of illustration.
Example of overall composition of opaque slip:
A glass frit of this type, which is high in fluxes and has produced satisfactory results in practice, corres-ponds, for example, to the following composition:
SiO246 to 48 % by weight Al20310 to 12 % by weight CaO1 to 1.5 % by weight MgOO.S to 1.5 % by weight K2010 to 11 % by we;ght Na206 to 9 % by weight 3239 to 11 X by weight Zr21.5 to 2% by weight SnO26 to 8 X by weight TiO20.5 to 1 % by weight.
Preferably, such a glass frit has an average ~5~355~
particle size of approximately 12 microns.
Example of overall composition of opaque layer:
A glass frit high in opacifying metal oxides, which is employed in a satisfactory manner in practice to produce an opaque layer according to the invention, corres-ponds, for example, to the following overall composition:
SiO2 42 to 46 X by weight Alz03 14 to 18 % by weight C30 0.8 to 1.7 % by weight MgO 9.5 to 1.5 % by weight ~zO 11 to 13 % by weight Na20 3 to 6% by weight B203 5 to 8 % by weight Zr2 3 to 5% by weight SnO2 11 to 14 X by weight TiO2 0 5 to 3 % by weight.
The above glass frit high in opacifying metal oxides advantageously has a mean particle size which is slightly greater, for example approximately 36 microns, while retaining the presence of a fraction of the order of 30 X by weight of particles ranging from approximately 40 to approximately 100 microns, favoring the refractory particles. This refractory particle fraction contains a proportion of opacifying metal oxides which is always greater than 25 X by weight, that is to say that these particles have a higher content of opacifying agents than the remainder of the composition.
The glass frits required for producing the layers according to the present invention are prepared in a ~25~3~57 ,~, conventional manner, from powdered mixtures of the re-quired components such as determined earlier. Such a powdered mixture is, for example, heated for one hour at a temperature of the order of 1500C, which, on melting,pro-duces a homogenization, followed~ for example, by quenchingto produce the frit which can subsequently be subjected to a grinding or granulation operation.
This grinding operation is carried out in a con-trolled manner to obtain the particle sizes required in accordance with the present invention.
The present application also relates to glass frits required for producing the ceramic layers called "opaque slip" or "opaque", which are distinguished by a composition containing:
10 to 30 X by weight of active products, 60 to 80 X by weight of a propellant gas, 10 to 30 X by weight of a solvent with a vaporiza-tion temperature of between approximately 40 and approxi-mately 80C, and 4 to 6 X by weight of a glue.
The propellant gas may consist, for example, of one or more chlorofluorinated hydrocarbons (Freo ~).
The mixture of glue and solvent may consist, for example, of officinal collodion dissolved in ethyl acetate. The solvent may advantageously also consist of a chlorinated hydrocarbon, for example CH2Cl2, and the glue may also consist of an acrylic or, preferably, cyanoacrylic, glue.
A composition of this kind is thus suitable for 7 ~25~3557 be;ng packaged in a dispenser bottle of the aerosol type.
This glass frit composition may thus be presented as such, to be ready for direct use. Simple spraying on the metal coping with the aid of an aerosol can thus makes it possible to produce thin layers of opaque slip or of opaque composition.
These layers are then fixed in a conventional manner by baking, for example in the course of a heat treatment at a temperature of the order of 80U to 850C for 7 to 8 minutes. It shoul~ also be noted that as a result of the particular compositions of the ceramics vhich are the subject of the present invention, it is thus possible to lower fairly substantially the baking temperature for fixing these layers. In fact, in the prior art such a baking temperature was never lower than approximately 950C. Moreover, the combination of the basal layer con-sisting of the layer of opaque slip and of the opaque layer may be applied so as to produce a layer with a mean thickness of approximately 80 microns. In the conventional prior art involving application with a brush, it was im-possible, strictly speaking, to attain thicknesses below approximately 120 microns.
The heat treatment for fixing the layer of opaque slip and the opaque layer generally requires two succes-sive bakings. However, when the glass frits required toproduce the opaque slip and opaque layers are deposited with the aid of an aerosol composition containing, for example, a cyanoacrylic glue, it is possible to fix the combination of the opaque layers and of the successive - 8 - ~ ~ 5 85S 7 layers during the same baking. Immediately after the spraying, the propellant gas and the solvents disappear rapidly and the glue acts as a fixer for the layers on the reinforcement. The solvent or the plasticizer sprayed when the successive layers, of dentine, incisal and trans-parent compositions, are deposited is chosen such that it does not dissolve a glue of this type. Consequently, the basal layers are not affected by the deposition of the following layers, and it is thus poss;ble to fix all the ceramic layers during a single baking, which represents a considerable saving in time. ~t should also be noted that the lowest temperatures for baking the basal layers are thus brought close to those of the other layers and, in fact, make it possible to envisage a single baking of the ~hole of the ceramo-metallic prosthesis.
Naturallv, the present invention is not restricted in any way to the examples of embodiment described above, but it is perfectly possible, without departing from the scope of the present invention thereby, to envisage a 2~ number of alternative embodiments thereof.
It should be noted, moreover, that, as a result of the better opacifying power, the dental ceramic according to the invention can be applied as a thinner layer, which leaves more space available for applying the following coats, nhich thus become easier to mold by the prosthetist.
Furthermore, the opaque dental ceramic composition according to the invention has been adapted to conform in expansion with its adjacent layers, and in particular with ;ts metal support. This compatibility is further consid-erably facilitated by its better opacity, which permits itto be deposited as a thinner layer.
The present invention which makes it possible to reconcile, on the one hand, the adhesion and, on the other hand, the opacity of this type of ceramic layer, springs from the parent concept based on separating into two distinct layers the single opaque layer usually employed in the prior art. The first undercoat, called "opaque slip", in direct contact with the reinforcement, is in-tended to contribute good adhesion to the metal, while the other layer, referred to as "opaque", has been designed to contribute the sufficient degree of opacity.
In accordance with the ?resent invention, the basal ceramic layer for opacifying the metal coping of a ceramo-metallic dental reconstruction consists of an _ 3 ~ 8S57 undercoat of opaque slip obtained from a glass frit high in fluxes and in particular in ~23' covered with an opaque layer obtained from a glass frit high in opacifying metal oxides and contain;ng approximately 30% by weight of refractory particles with a particle size of between approxi-mately 40 microns and approximately 100 microns.
Other features and advantages of the present in-vention will become apparent from the reading of the de-tailed description which follows, relying particularly on individual examples of application, which are given simply as illustrations.
The glass frit which is high in fluxes and inten-ded to form the undercoat of opaque slip in contact with the metal coping, advantageously contains approximately 8 to approximately 14 X by weight, and preferably from approximately 9 to approximately 11 X by weight, of 8203.
It is precisely this high content of boron oxide which makes it possible to improve the metal adhesion capacity of this undercoat of opaque slip. It should be noted, however, that ~23 contents above approximately 14 %
by weight would result in glass frits which cannot be used in practice, since they would become too readily melted. In fact, an undercoat of opaque slip must not have melting temperatures which are too low, since its melting temperature must in any event remain above those of the following top layers which are laid down and subse-quently heat-stabilized.
Insofar as the opaque layer as such is concerned, this of course contains opacifying agents such as tin oxide, titanium oxide and zirconium oxide, in a high con-centration. However, the opacifying capacity of this layer is considerably increased by the presence of a high proportion (of the order of 30 ~ by weight) of relatively large refractory particles, that is to say with a particle size of between approximately 40 and approximately 100 mi-crons. The presence of these refractory particles of relatively large sizes produces, after baking, a roughness in the surface of this opaque layer wh;ch contributes an effect of light scatter through the more translucent upper layers and thus improves the effect of tooth "depth".
Two examples of composition of glass frits inten-ded for producing an undercoat of opaque slip and an opaque layer are given below by way of illustration.
Example of overall composition of opaque slip:
A glass frit of this type, which is high in fluxes and has produced satisfactory results in practice, corres-ponds, for example, to the following composition:
SiO246 to 48 % by weight Al20310 to 12 % by weight CaO1 to 1.5 % by weight MgOO.S to 1.5 % by weight K2010 to 11 % by we;ght Na206 to 9 % by weight 3239 to 11 X by weight Zr21.5 to 2% by weight SnO26 to 8 X by weight TiO20.5 to 1 % by weight.
Preferably, such a glass frit has an average ~5~355~
particle size of approximately 12 microns.
Example of overall composition of opaque layer:
A glass frit high in opacifying metal oxides, which is employed in a satisfactory manner in practice to produce an opaque layer according to the invention, corres-ponds, for example, to the following overall composition:
SiO2 42 to 46 X by weight Alz03 14 to 18 % by weight C30 0.8 to 1.7 % by weight MgO 9.5 to 1.5 % by weight ~zO 11 to 13 % by weight Na20 3 to 6% by weight B203 5 to 8 % by weight Zr2 3 to 5% by weight SnO2 11 to 14 X by weight TiO2 0 5 to 3 % by weight.
The above glass frit high in opacifying metal oxides advantageously has a mean particle size which is slightly greater, for example approximately 36 microns, while retaining the presence of a fraction of the order of 30 X by weight of particles ranging from approximately 40 to approximately 100 microns, favoring the refractory particles. This refractory particle fraction contains a proportion of opacifying metal oxides which is always greater than 25 X by weight, that is to say that these particles have a higher content of opacifying agents than the remainder of the composition.
The glass frits required for producing the layers according to the present invention are prepared in a ~25~3~57 ,~, conventional manner, from powdered mixtures of the re-quired components such as determined earlier. Such a powdered mixture is, for example, heated for one hour at a temperature of the order of 1500C, which, on melting,pro-duces a homogenization, followed~ for example, by quenchingto produce the frit which can subsequently be subjected to a grinding or granulation operation.
This grinding operation is carried out in a con-trolled manner to obtain the particle sizes required in accordance with the present invention.
The present application also relates to glass frits required for producing the ceramic layers called "opaque slip" or "opaque", which are distinguished by a composition containing:
10 to 30 X by weight of active products, 60 to 80 X by weight of a propellant gas, 10 to 30 X by weight of a solvent with a vaporiza-tion temperature of between approximately 40 and approxi-mately 80C, and 4 to 6 X by weight of a glue.
The propellant gas may consist, for example, of one or more chlorofluorinated hydrocarbons (Freo ~).
The mixture of glue and solvent may consist, for example, of officinal collodion dissolved in ethyl acetate. The solvent may advantageously also consist of a chlorinated hydrocarbon, for example CH2Cl2, and the glue may also consist of an acrylic or, preferably, cyanoacrylic, glue.
A composition of this kind is thus suitable for 7 ~25~3557 be;ng packaged in a dispenser bottle of the aerosol type.
This glass frit composition may thus be presented as such, to be ready for direct use. Simple spraying on the metal coping with the aid of an aerosol can thus makes it possible to produce thin layers of opaque slip or of opaque composition.
These layers are then fixed in a conventional manner by baking, for example in the course of a heat treatment at a temperature of the order of 80U to 850C for 7 to 8 minutes. It shoul~ also be noted that as a result of the particular compositions of the ceramics vhich are the subject of the present invention, it is thus possible to lower fairly substantially the baking temperature for fixing these layers. In fact, in the prior art such a baking temperature was never lower than approximately 950C. Moreover, the combination of the basal layer con-sisting of the layer of opaque slip and of the opaque layer may be applied so as to produce a layer with a mean thickness of approximately 80 microns. In the conventional prior art involving application with a brush, it was im-possible, strictly speaking, to attain thicknesses below approximately 120 microns.
The heat treatment for fixing the layer of opaque slip and the opaque layer generally requires two succes-sive bakings. However, when the glass frits required toproduce the opaque slip and opaque layers are deposited with the aid of an aerosol composition containing, for example, a cyanoacrylic glue, it is possible to fix the combination of the opaque layers and of the successive - 8 - ~ ~ 5 85S 7 layers during the same baking. Immediately after the spraying, the propellant gas and the solvents disappear rapidly and the glue acts as a fixer for the layers on the reinforcement. The solvent or the plasticizer sprayed when the successive layers, of dentine, incisal and trans-parent compositions, are deposited is chosen such that it does not dissolve a glue of this type. Consequently, the basal layers are not affected by the deposition of the following layers, and it is thus poss;ble to fix all the ceramic layers during a single baking, which represents a considerable saving in time. ~t should also be noted that the lowest temperatures for baking the basal layers are thus brought close to those of the other layers and, in fact, make it possible to envisage a single baking of the ~hole of the ceramo-metallic prosthesis.
Naturallv, the present invention is not restricted in any way to the examples of embodiment described above, but it is perfectly possible, without departing from the scope of the present invention thereby, to envisage a 2~ number of alternative embodiments thereof.
Claims (23)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Ceramic basal layer for opacifying the metal coping of a ceramo-metallic dental reconstruction, which consists of an undercoat of opaque slip produced from a glass frit high in fluxes and containing from 8% to 14% by weight of B2O3, said glass frit having a melting temperature higher than the melting temperature of the top layers, said undercoat layer being covered with an opaque layer produced from a glass frit high in opacifying metal oxides and containing approximately 30% by weight of refractory particles with a particle size of between approximately 40 microns and approximately 100 microns.
2. Ceramic layer as claimed in Claim 1, in which the glass frit high in fluxes contains from approximately 9 to approximately 11% by weight of B2O3.
3. Ceramic layer as claimed in Claim 1, in which the glass frit high in fluxes has a mean particle size of approximately 12 microns.
4. Ceramic layer as claimed in Claim 1, in which the glass frit high in opacifying metal oxides has a mean particle size of approximately 36 microns.
5. Ceramic layer as claimed in Claim 1, in which the glass frit high in fluxes corresponds to the following composition:
SiO2 46 to 48% by weight AL2O3 10 to 12% by weight CaO 1 to 1.5% by weight MgO 0.5 to 1.5% by weight K2O 10 to 11% by weight Na2 6 to 9% by weight B2O3 9 to 11% by weight ZrO2 1.5 to 2% by weight SnO2 6 to 8% by weight TiO2 0.5 to 1% by weight
SiO2 46 to 48% by weight AL2O3 10 to 12% by weight CaO 1 to 1.5% by weight MgO 0.5 to 1.5% by weight K2O 10 to 11% by weight Na2 6 to 9% by weight B2O3 9 to 11% by weight ZrO2 1.5 to 2% by weight SnO2 6 to 8% by weight TiO2 0.5 to 1% by weight
6. Ceramic layer as claimed in Claim 1, in which the glass frit high in opacifying metal oxides corresponds to the following composition:
SiO2 42 to 46% by weight AL2O3 14 to 18% by weight CaO 0.8 to 1.7% by weight MgO 0.5 to 1.5% by weight K2O 11 to 13% by weight Na2O 3 to 6% by weight B2O3 5 to 8% by weight ZrO2 3 to 5% by weight SnO2 11 to 14% by weight TiO2 0.5 to 3% by weight
SiO2 42 to 46% by weight AL2O3 14 to 18% by weight CaO 0.8 to 1.7% by weight MgO 0.5 to 1.5% by weight K2O 11 to 13% by weight Na2O 3 to 6% by weight B2O3 5 to 8% by weight ZrO2 3 to 5% by weight SnO2 11 to 14% by weight TiO2 0.5 to 3% by weight
7. A composition for producing a ceramic layer which is presented in the form of a composition suitable for packaging in a dispenser bottle of the aerosol type, containing:
10 to 30% by weight of active products, 60 to 80% by weight of a propellant gas, 10 to 30% by weight of a solvent with a vaporization temperature between approximately 40 and 80°C, and 4 to 6% by weight of a glue, said active products comprising a first glass frit high in fluxes and containing from 8% to 14% by weight of B2O3 and a further glass frit having a content high in opacifying metal oxides and containing 30%
by weight of refractory particles with a particle size of between approximately 40 microns and approximately 100 microns, said first glass frit having a higher melting temperature than said further glass frit.
10 to 30% by weight of active products, 60 to 80% by weight of a propellant gas, 10 to 30% by weight of a solvent with a vaporization temperature between approximately 40 and 80°C, and 4 to 6% by weight of a glue, said active products comprising a first glass frit high in fluxes and containing from 8% to 14% by weight of B2O3 and a further glass frit having a content high in opacifying metal oxides and containing 30%
by weight of refractory particles with a particle size of between approximately 40 microns and approximately 100 microns, said first glass frit having a higher melting temperature than said further glass frit.
8. A composition as claimed in Claim 7, which are presented in the form of a composition containing:
10 to 30% by weight of active products, 60 to 80% by weight of a propellant gas consisting of one or more chloro-fluorinated hydrocarbons, 10 to 30% by weight of CH2CL2 4 to 6% by weight of a cyanoacrylic glue.
10 to 30% by weight of active products, 60 to 80% by weight of a propellant gas consisting of one or more chloro-fluorinated hydrocarbons, 10 to 30% by weight of CH2CL2 4 to 6% by weight of a cyanoacrylic glue.
9. Ceramic layer as claimed in Claim 2, in which the glass frit high in fluxes has a mean particle size of approximately 12 microns.
10. Ceramic layer as claimed in Claim 9, in which the glass frit high in opacifying metal oxides has a mean particle size of approximately 36 microns.
11. Ceramic layer as claimed in Claim 2, in which the glass frit high in opacifying metal oxides has a mean particle size of approximately 36 microns.
12. Ceramic layer as claimed in Claim 3, in which the glass frit high in opacifying metal oxides has a mean particle size of approximately 36 microns.
13. Ceramic layer as claimed in Claims 2, 3 or 4, in which the glass frit high in fluxes corresponds to the following composition:
SiO2 46 to 48% by weight AL2O3 10 to 12% by weight CaO 1 to 1.5% by weight MgO 0.5 to 1.5% by weight K2O 10 to 11% by weight Na2O 6 to 9% by weight B2O3 9 to 11% by weight ZrO2 1.5 to 2% by weight SnO2 6 to 8% by weight TiO2 0.5 to 1% by weight
SiO2 46 to 48% by weight AL2O3 10 to 12% by weight CaO 1 to 1.5% by weight MgO 0.5 to 1.5% by weight K2O 10 to 11% by weight Na2O 6 to 9% by weight B2O3 9 to 11% by weight ZrO2 1.5 to 2% by weight SnO2 6 to 8% by weight TiO2 0.5 to 1% by weight
14. Ceramic layer as claimed in Claims 2, 3 or 4, in which the glass frit high in opacifying metal oxides corresponds to the following composition:
SiO2 42 to 46% by weight AL2O3 14 to 18% by weight CaO 0.8 to 1. 7% by weight MgO 0.5 to 1. 5% by weight K2O 11 to 13% by weight Na2O 3 to 6% by weight B2O3 5 to 8% by weight ZrO2 3 to 5% by weight SnO2 11 to 14% by weight TiO2 0.5 to 3% by weight
SiO2 42 to 46% by weight AL2O3 14 to 18% by weight CaO 0.8 to 1. 7% by weight MgO 0.5 to 1. 5% by weight K2O 11 to 13% by weight Na2O 3 to 6% by weight B2O3 5 to 8% by weight ZrO2 3 to 5% by weight SnO2 11 to 14% by weight TiO2 0.5 to 3% by weight
15. Ceramic layer as claimed in Claims 9, 10 or 11, in which the glass frit high in opacifying metal oxides corresponds to the following composition:
SiO2 42 to 46% by weight AL2O3 14 to 18% by weight CaO 0.8 to 1. 7% by weight MgO 0.5 to 1.5% by weight K2O 11 to 13% by weight Na2O 3 to 6% by weight B2O3 5 to 8% by weight ZrO2 3 to 5% by weight SnO2 11 to 14% by weight TiO2 0.5 to 3% by weight
SiO2 42 to 46% by weight AL2O3 14 to 18% by weight CaO 0.8 to 1. 7% by weight MgO 0.5 to 1.5% by weight K2O 11 to 13% by weight Na2O 3 to 6% by weight B2O3 5 to 8% by weight ZrO2 3 to 5% by weight SnO2 11 to 14% by weight TiO2 0.5 to 3% by weight
16. Ceramic layer as claimed in Claims 9, 10 or 11, in which the glass frit high in opacifying metal oxides corresponds to the following composition:
SiO2 46 to 48% by weight AL2O3 10 to 12% by weight CaO 1 to 1.5% by weight MgO 0.5 to 1.5% by weight K2O 10 to 11% by weight Na2O 6 to 9% by weight B2O3 9 to 11% by weight ZrO2 1.5 to 2% by weight SnO2 6 to 8% by weight TiO2 0.5 to 1% by weight
SiO2 46 to 48% by weight AL2O3 10 to 12% by weight CaO 1 to 1.5% by weight MgO 0.5 to 1.5% by weight K2O 10 to 11% by weight Na2O 6 to 9% by weight B2O3 9 to 11% by weight ZrO2 1.5 to 2% by weight SnO2 6 to 8% by weight TiO2 0.5 to 1% by weight
17. A composition for producing a ceramic layer presented in the form of a composition suitable for packaging in a dispenser bottle of the aerosol type, containing:
10 to 30% by weight of active products, 60 to 80% by weight of a propellant gas, 10 to 30% by weight of a solvent with a vaporization temperature between approximately 40 and 80°C, and 4 to 6% by weight of a glue, said active products comprising a first glass frit high in fluxes and containing from 9% to 11% by weight of B2O3 and a further glass frit having a content high in opacifying metal oxides and containing 30%
by weight of refractory particles with a particle size of between approximately 40 microns and approximately 100 microns, said first glass frit having a higher melting temperature than said further glass frit.
10 to 30% by weight of active products, 60 to 80% by weight of a propellant gas, 10 to 30% by weight of a solvent with a vaporization temperature between approximately 40 and 80°C, and 4 to 6% by weight of a glue, said active products comprising a first glass frit high in fluxes and containing from 9% to 11% by weight of B2O3 and a further glass frit having a content high in opacifying metal oxides and containing 30%
by weight of refractory particles with a particle size of between approximately 40 microns and approximately 100 microns, said first glass frit having a higher melting temperature than said further glass frit.
18. A composition for producing a ceramic layer presented in the form of a composition suitable for packaging in a dispenser bottle of the aerosol type, containing:
10 to 30% by weight of active products, 60 to 80% by weight of a propellant gas, 10 to 30% by weight of a solvent with a vaporization temperature between approximately 40 and 80°C, and 4 to 6% by weight of a glue, said active products comprising a first glass frit high in fluxes and containing from 8% to 14% by weight of B2O3 and a further glass frit having a content high in opacifying metal oxides and containing 30%
by weight of refractory particles with a particle size of between approximately 40 microns and approximately 100 microns, said first glass frit having a higher melting temperature than said further glass frit, and wherein said first glass frit corresponds to the following composition:
SiO2 46 to 48% by weight AL2O3 10 to 12% by weight CaO 1 to 1.5% by weight MgO 0.5 to 1.5% by weight K2O 10 to 11% by weight Na2O 6 to 9% by weight B2O3 9 to 11% by weight ZrO2 1.5 to 2% by weight SnO2 6 to 8% by weight TiO2 0.5 to 1% by weight
10 to 30% by weight of active products, 60 to 80% by weight of a propellant gas, 10 to 30% by weight of a solvent with a vaporization temperature between approximately 40 and 80°C, and 4 to 6% by weight of a glue, said active products comprising a first glass frit high in fluxes and containing from 8% to 14% by weight of B2O3 and a further glass frit having a content high in opacifying metal oxides and containing 30%
by weight of refractory particles with a particle size of between approximately 40 microns and approximately 100 microns, said first glass frit having a higher melting temperature than said further glass frit, and wherein said first glass frit corresponds to the following composition:
SiO2 46 to 48% by weight AL2O3 10 to 12% by weight CaO 1 to 1.5% by weight MgO 0.5 to 1.5% by weight K2O 10 to 11% by weight Na2O 6 to 9% by weight B2O3 9 to 11% by weight ZrO2 1.5 to 2% by weight SnO2 6 to 8% by weight TiO2 0.5 to 1% by weight
19. Glass frits required for producing a ceramic layer as claimed in Claims 10, 11 or 12, which are presented in the form of a composition suitable for packaging in a dispenser bottle of the aerosol type, containing:
10 to 30% by weight of active products, 60 to 80% by weight of a propellant gas, 10 to 30% by weight of a solvent with a vaporization temperature between approximately 40 and 80°C, and 4 to 6% by weight of a glue, said active products comprising a first glass frit high in fluxes and containing from 8% to 14% by weight of B2O3 and a further glass frit having a content high in opacifying metal oxides and containing 30%
by weight of refractory particles with a particle size of between approximately 40 microns and approximately 100 microns, said first glass frit having a higher melting temperature than said further glass frit, and wherein said first glass frit corresponds to the following composition:
SiO2 46 to 48% by weight AL2O3 10 to 12% by weight CaO 1 to 1.5% by weight MgO 0.5 to 1.5% by weight K2O 10 to 11% by weight Na2O 6 to 9% by weight B2O3 9 to 11% by weight ZrO2 1.5 to 2% by weight SnO2 6 to 8% by weight TiO2 0.5 to 1% by weight
10 to 30% by weight of active products, 60 to 80% by weight of a propellant gas, 10 to 30% by weight of a solvent with a vaporization temperature between approximately 40 and 80°C, and 4 to 6% by weight of a glue, said active products comprising a first glass frit high in fluxes and containing from 8% to 14% by weight of B2O3 and a further glass frit having a content high in opacifying metal oxides and containing 30%
by weight of refractory particles with a particle size of between approximately 40 microns and approximately 100 microns, said first glass frit having a higher melting temperature than said further glass frit, and wherein said first glass frit corresponds to the following composition:
SiO2 46 to 48% by weight AL2O3 10 to 12% by weight CaO 1 to 1.5% by weight MgO 0.5 to 1.5% by weight K2O 10 to 11% by weight Na2O 6 to 9% by weight B2O3 9 to 11% by weight ZrO2 1.5 to 2% by weight SnO2 6 to 8% by weight TiO2 0.5 to 1% by weight
20. A composition as claimed in Claim 17, wherein said first glass frit has a mean particle size of approximately 12 microns.
21. A composition as claimed in Claim 17, wherein said further glass frit has a mean particle size of approximately 36 microns.
22. A composition as claimed in Claim 18, wherein said further glass frit has the following composition:
SiO2 42 to 46% by weight AL2O3 14 to 18% by weight CaO 0.8 to 1.7% by weight MgO 0.5 to 1.5% by weight K2O 11 to 13% by weight Na2O 3 to 6% by weight B2O3 5 to 8% by weight ZrO2 3 to 5% by weight SnO2 11 to 14% by weight TiO2 0.5 to 3% by weight
SiO2 42 to 46% by weight AL2O3 14 to 18% by weight CaO 0.8 to 1.7% by weight MgO 0.5 to 1.5% by weight K2O 11 to 13% by weight Na2O 3 to 6% by weight B2O3 5 to 8% by weight ZrO2 3 to 5% by weight SnO2 11 to 14% by weight TiO2 0.5 to 3% by weight
23. A composition as claimed in Claim 18, wherein said first glass frit has a mean particle size of approximately 12 microns.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR84/02295 | 1984-02-15 | ||
| FR8402295A FR2559384B1 (en) | 1984-02-15 | 1984-02-15 | BASIC CERAMIC LAYER FOR THE OPACIFICATION OF THE METAL CAP OF A DENTAL CERAMO-METALLIC RECONSTRUCTION |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1258557A true CA1258557A (en) | 1989-08-22 |
Family
ID=9301066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000474154A Expired CA1258557A (en) | 1984-02-15 | 1985-02-13 | Basal ceramic layer for opacifying the metal coping of a ceramo-metallic dental reconstruction |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0152337B1 (en) |
| JP (1) | JPS60191030A (en) |
| AT (1) | ATE44454T1 (en) |
| CA (1) | CA1258557A (en) |
| DE (1) | DE3571389D1 (en) |
| DK (1) | DK69585A (en) |
| ES (1) | ES8601679A1 (en) |
| FR (1) | FR2559384B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0631995A1 (en) | 1993-06-24 | 1995-01-04 | Dentsply GmbH | Dental prosthesis |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4879136A (en) * | 1987-02-24 | 1989-11-07 | Dentsply G.M.B.H. | Method of applying opaque dental ceramic material to a metal structure |
| US4806383A (en) * | 1987-02-24 | 1989-02-21 | Dentsply Gmbh | Method of applying opaque dental cermic material to a metal structure |
| EP0364281A3 (en) * | 1988-10-14 | 1991-01-09 | Warden-Pitts Dental Labs, Inc. | Spray opaque composition for coating dental appliances |
| EP0630639A1 (en) * | 1993-06-25 | 1994-12-28 | Vita Zahnfabrik H. Rauter GmbH & Co KG | Dental ceramic restoration having a multilayered structure |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1441336B1 (en) * | 1962-08-29 | 1971-04-22 | Permadent Products Corp | Dental part, in particular tooth, made of a metal base and a porcelain cap and method for its production |
| NL302657A (en) * | 1962-12-24 | |||
| SU624622A1 (en) * | 1975-07-11 | 1978-09-25 | Московский Ордена Трудового Красного Знамени Медицинский Стоматологический Институт Имени Н.А.Семашко | Tooth prosthesis coating |
| US4215033A (en) * | 1978-09-08 | 1980-07-29 | American Dental Association Health Foundation | Composite dental material |
-
1984
- 1984-02-15 FR FR8402295A patent/FR2559384B1/en not_active Expired
-
1985
- 1985-02-01 AT AT85400171T patent/ATE44454T1/en not_active IP Right Cessation
- 1985-02-01 EP EP85400171A patent/EP0152337B1/en not_active Expired
- 1985-02-01 DE DE8585400171T patent/DE3571389D1/en not_active Expired
- 1985-02-13 ES ES540355A patent/ES8601679A1/en not_active Expired
- 1985-02-13 CA CA000474154A patent/CA1258557A/en not_active Expired
- 1985-02-14 JP JP60027535A patent/JPS60191030A/en active Pending
- 1985-02-14 DK DK69585A patent/DK69585A/en not_active Application Discontinuation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0631995A1 (en) | 1993-06-24 | 1995-01-04 | Dentsply GmbH | Dental prosthesis |
| US5849068A (en) * | 1993-06-24 | 1998-12-15 | Dentsply G.M.B.H. | Dental prosthesis |
| US6126732A (en) * | 1993-06-24 | 2000-10-03 | Dentsply Detrey Gmbh | Dental prosthesis |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2559384B1 (en) | 1987-04-03 |
| EP0152337A2 (en) | 1985-08-21 |
| EP0152337B1 (en) | 1989-07-12 |
| ES540355A0 (en) | 1985-12-01 |
| DK69585D0 (en) | 1985-02-14 |
| JPS60191030A (en) | 1985-09-28 |
| ES8601679A1 (en) | 1985-12-01 |
| EP0152337A3 (en) | 1985-09-25 |
| FR2559384A1 (en) | 1985-08-16 |
| ATE44454T1 (en) | 1989-07-15 |
| DE3571389D1 (en) | 1989-08-17 |
| DK69585A (en) | 1985-08-16 |
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