WO2008012467A2 - Metal oxides based glass for the manufacture of ceramic dental prostheses - Google Patents
Metal oxides based glass for the manufacture of ceramic dental prostheses Download PDFInfo
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- WO2008012467A2 WO2008012467A2 PCT/FR2007/051709 FR2007051709W WO2008012467A2 WO 2008012467 A2 WO2008012467 A2 WO 2008012467A2 FR 2007051709 W FR2007051709 W FR 2007051709W WO 2008012467 A2 WO2008012467 A2 WO 2008012467A2
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- WIPO (PCT)
- Prior art keywords
- oxide
- weight
- glass
- metal oxides
- glass according
- Prior art date
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- 239000011521 glass Substances 0.000 title claims abstract description 39
- 229910044991 metal oxide Inorganic materials 0.000 title claims abstract description 21
- 150000004706 metal oxides Chemical class 0.000 title claims abstract description 21
- 239000000919 ceramic Substances 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 239000002245 particle Substances 0.000 claims abstract description 13
- 239000011148 porous material Substances 0.000 claims abstract description 13
- 238000005470 impregnation Methods 0.000 claims abstract description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 5
- UZLYXNNZYFBAQO-UHFFFAOYSA-N oxygen(2-);ytterbium(3+) Chemical compound [O-2].[O-2].[O-2].[Yb+3].[Yb+3] UZLYXNNZYFBAQO-UHFFFAOYSA-N 0.000 claims abstract description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 14
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 10
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 229910000480 nickel oxide Inorganic materials 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 4
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 4
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 3
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 claims description 2
- 238000004040 coloring Methods 0.000 claims description 2
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000843 powder Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
- C03C3/068—Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5022—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with vitreous materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/86—Glazes; Cold glazes
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00836—Uses not provided for elsewhere in C04B2111/00 for medical or dental applications
Definitions
- the present invention relates to a glass based on metal oxides for the manufacture of ceramic dental prostheses and more specifically to a glass based on metal oxides for impregnating an open-pore sintered structure consisting of particles of less a metal oxide for the manufacture of ceramic dental prostheses.
- Document EP 0 241 384 B1 discloses a method of manufacturing ceramic dental prostheses.
- an open-pore sintered structure consisting of metal oxide particles, made on the surface of a tooth model, is impregnated with a glass consisting mainly of a mixture of oxides which, after solidification, is presented in the totally amorphous state by being transparent or in a more or less crystallized state while being opalescent.
- a glass consisting mainly of a mixture of oxides which, after solidification, is presented in the totally amorphous state by being transparent or in a more or less crystallized state while being opalescent.
- a more or less translucent prosthesis is obtained.
- the impregnation of the sintered framework is carried out with a glass comprising between 5 and 7% by weight of calcium oxide (CaO) and between 25 and 28% by weight of oxide of lanthanum (La 2 O 3 ).
- the present invention proposes to provide a glass based on metal oxides for the impregnation of an open-pore sintered structure consisting of particles of at least one metal oxide for the manufacture of ceramic dental prostheses having, by its composition, features that significantly improve the quality and appearance of the resulting dental prosthesis.
- the glass according to the present invention is essentially characterized by the fact that it mainly comprises from 40 to 50% by weight of lanthanum oxide (La 2 O 3 ), from 5 to 15% by weight of ytterbium oxide ( Yb 2 O 3 ) and from 35 to 55% by weight of other metal oxides, excluding calcium oxide (CaO).
- La 2 O 3 lanthanum oxide
- Yb 2 O 3 ytterbium oxide
- CaO calcium oxide
- the glass according to the invention does not comprise calcium oxide but on the other hand has a substantially higher content of lanthanum oxide.
- the glass according to the invention infiltrates in a much more homogeneous manner in the open-pore sintered structure and no demixing phenomenon is observed. Moreover, there is a noticeable decrease in the water solubility of the substructure after impregnation with the glass according to the invention.
- the refractive index is generally between 1.65 and 1.80.
- the ceramic prosthesis obtained is more translucent due to a substantially increased optical transmission coefficient in the visible.
- the ceramic prosthesis is fluorescent and its mechanical properties and fatigue resistance are improved.
- the glass according to the invention may comprise the following metal oxides:
- silica SiO 2
- alumina Al 2 O 3
- boron oxide B 2 O 3
- titanium oxide (TiO 2 ) preferably from 6 to 10% by weight and, optionally, from
- the glass according to the invention may be colored and comprises for this purpose one or more metal coloring oxides chosen from the group including cerium oxide (CeO 2 ), preferably up to 5% by weight, the oxide iron (Fe 2 O 3 ), preferably up to 2% by weight, nickel oxide (NiO), preferably up to 1% by weight, and cobalt oxide (CoO), preferably up to 1% by weight.
- CeO 2 cerium oxide
- Fe 2 O 3 oxide
- NiO nickel oxide
- CoO cobalt oxide
- the present invention also relates to a process for impregnating, using a glass, an open-pore fritted framework consisting of particles of at least one metal oxide for the manufacture of ceramic dental prostheses, essentially characterized by the that the infrastructure is brought into contact with a glass as defined above, in the liquid state at a temperature between 1000 0 C and 1250 0 C for a time between 20 'and 3 h, the glass s infiltrating the infrastructure that constitutes the skeleton of the prosthesis and occupies all the open pores that this infrastructure contains.
- the infrastructure according to the invention is advantageously composed of particles of pure alumina (Al 2 O 3 ) or particles of pure zirconia (ZrO 2 ) or a mixture thereof.
- the average particle size is preferably between 0.5 ⁇ m and 20 ⁇ m.
- sintered infrastructure is understood to mean an open-pore network formed of metal oxide particles bonded together by a slight solid-phase sintering, the sintering taking place without causing a significant shrinkage of the volume of the infrastructure. .
- the impregnation of the infrastructure using glass based on metal oxides can be carried out under vacuum or in the open air.
- the impregnation can for example be carried out by placing in a cup a bed of glass powder on which the infrastructure is placed and then the whole is brought to the desired temperature.
- the molten glass penetrates capillary into the pores of the structure until it occupies all the pores of the infrastructure.
- the infrastructure can be realized by different methods.
- the infrastructure may also for example be manufactured by uniaxial or isostatic compression of a powder, followed by partial sintering of the block of agglomerated powder, and finally by machining the block in particular by a digital milling machine.
- Impregnation of a pure alumina (Al 2 O 3 ) sintered structure was made by contacting it under vacuum with an uncoloured glass at a temperature of 1150 ° C. and for a time of 20 ', the glass presenting the following composition by weight:
- Example 2 The impregnation of a sintered framework comprising by weight 66% of pure alumina (Al 2 O 3) and 34% of pure zirconia (ZrO 2 ) was carried out by contacting it under vacuum with an uncoloured glass at a temperature of 1100.degree. 0 C and for a time of 40 ', the glass having the following composition by weight:
- Example 2 The impregnation of the same infrastructure as that of Example 2 was carried out by putting it in contact with air with a colored glass at a temperature of 1130 ° C. for a time of 3 hours, the glass having the composition of following weight:
- NiO nickel oxide
- Impregnation of a pure zirconia (ZrO 2 ) sintered structure was made by contacting it with air with a colored glass at a temperature of 1180 ° C. for a time of 1 h, the glass having the composition in following weight:
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Glass Compositions (AREA)
- Dental Preparations (AREA)
Abstract
Description
Verre à base d'oxydes métalliques pour la fabrication de prothèses dentaires céramiques Glass based on metal oxides for the manufacture of ceramic dental prostheses
La présente invention est relative à un verre à base d'oxydes métalliques pour la fabrication de prothèses dentaires céramiques et plus précisément un verre à base d'oxydes métalliques pour l'imprégnation d'une infrastructure frittée à pores ouverts constituée de particules d'au moins un oxyde métallique pour la fabrication de prothèses dentaires céramiques.The present invention relates to a glass based on metal oxides for the manufacture of ceramic dental prostheses and more specifically to a glass based on metal oxides for impregnating an open-pore sintered structure consisting of particles of less a metal oxide for the manufacture of ceramic dental prostheses.
On connaît par le document EP 0 241 384 Bl un procédé de fabrication de prothèses dentaires céramiques.Document EP 0 241 384 B1 discloses a method of manufacturing ceramic dental prostheses.
Dans ce procédé, une infrastructure frittée à pores ouverts constituée de particules d'oxydes métalliques, réalisée sur la surface d'un modèle de dent, est imprégnée d'un verre constitué principalement par un mélange d'oxydes qui, après solidification, se présente à l'état totalement amorphe en étant transparent ou à l'état plus ou moins cristallisé en étant opalescent. Selon l'indice de réfraction du verre on obtient une prothèse plus ou moins translucide.In this process, an open-pore sintered structure consisting of metal oxide particles, made on the surface of a tooth model, is impregnated with a glass consisting mainly of a mixture of oxides which, after solidification, is presented in the totally amorphous state by being transparent or in a more or less crystallized state while being opalescent. Depending on the refractive index of the glass, a more or less translucent prosthesis is obtained.
Dans les exemples décrits dans le document antérieur, l'imprégnation de l'infrastructure frittée s'effectue avec un verre comprenant entre 5 et 7 % en poids d'oxyde de calcium (CaO) et entre 25 et 28 % en poids d'oxyde de lanthane (La2O3).In the examples described in the previous document, the impregnation of the sintered framework is carried out with a glass comprising between 5 and 7% by weight of calcium oxide (CaO) and between 25 and 28% by weight of oxide of lanthanum (La 2 O 3 ).
La présente invention se propose de fournir un verre à base d'oxydes métalliques pour l'imprégnation d'une infrastructure frittée à pores ouverts constituée de particules d'au moins un oxyde métallique pour la fabrication de prothèses dentaires céramiques présentant de par sa composition des caractéristiques permettant d'améliorer sensiblement la qualité et l'aspect de la prothèse dentaire obtenue.The present invention proposes to provide a glass based on metal oxides for the impregnation of an open-pore sintered structure consisting of particles of at least one metal oxide for the manufacture of ceramic dental prostheses having, by its composition, features that significantly improve the quality and appearance of the resulting dental prosthesis.
Le verre selon la présente invention se caractérise essentiellement par le fait qu'il comprend principalement de 40 à 50 % en poids d'oxyde de lanthane (La2O3), de 5 à 15 % en poids d'oxyde d'ytterbium (Yb2O3) et de 35 à 55 % en poids d'autres oxydes métalliques, à l'exclusion de l'oxyde de calcium (CaO).The glass according to the present invention is essentially characterized by the fact that it mainly comprises from 40 to 50% by weight of lanthanum oxide (La 2 O 3 ), from 5 to 15% by weight of ytterbium oxide ( Yb 2 O 3 ) and from 35 to 55% by weight of other metal oxides, excluding calcium oxide (CaO).
Contrairement au verre décrit dans le document antérieur mentionné ci-dessus, le verre selon l'invention ne comporte pas d'oxyde de calcium mais par contre comporte une teneur sensiblement plus élevée en oxyde de lanthane.Unlike the glass described in the above-mentioned prior art, the glass according to the invention does not comprise calcium oxide but on the other hand has a substantially higher content of lanthanum oxide.
Le verre selon l'invention s'infiltre de manière beaucoup plus homogène dans l'infrastructure frittée à pores ouverts et on ne constate pas de phénomène de démixtion. On constate par ailleurs une diminution sensible de la solubilité en milieu hydrique de l'infrastructure après imprégnation avec le verre selon l'invention.The glass according to the invention infiltrates in a much more homogeneous manner in the open-pore sintered structure and no demixing phenomenon is observed. Moreover, there is a noticeable decrease in the water solubility of the substructure after impregnation with the glass according to the invention.
L'indice de réfraction est en général compris entre 1,65 et 1,80.The refractive index is generally between 1.65 and 1.80.
La prothèse céramique obtenue est plus translucide du fait d'un coefficient optique de transmission dans le visible sensiblement augmenté.The ceramic prosthesis obtained is more translucent due to a substantially increased optical transmission coefficient in the visible.
La prothèse céramique est fluorescente et ses propriétés mécaniques et de résistance à la fatigue sont améliorées.The ceramic prosthesis is fluorescent and its mechanical properties and fatigue resistance are improved.
Le verre selon l'invention peut comprendre les oxydes métalliques suivants :The glass according to the invention may comprise the following metal oxides:
- silice (SiO2), de préférence entre 10 et 15 % en poids, alumine (Al2O3), de préférence de 8 à 15 % en poids, oxyde de bore (B2O3), de préférence de 10 à 15 % en poids,silica (SiO 2 ), preferably between 10 and 15% by weight, alumina (Al 2 O 3 ), preferably from 8 to 15% by weight, boron oxide (B 2 O 3 ), preferably from 10 to 15% by weight,
- oxyde de titane (TiO2), de préférence de 6 à 10 % en poids et, facultativement, de latitanium oxide (TiO 2 ), preferably from 6 to 10% by weight and, optionally, from
- zircone (ZrO2), de préférence jusqu'à 10 % en poids. Facultativement, le verre selon l'invention peut être coloré et comprend à cet effet un ou plusieurs oxydes métalliques colorants choisis dans le groupe incluant l'oxyde de cérium (CeO2), de préférence jusqu'à 5 % en poids, l'oxyde de fer ((Fe2O3), de préférence jusqu'à 2 % en poids, l'oxyde de nickel (NiO), de préférence jusqu'à 1 % en poids, et l'oxyde de cobalt (CoO), de préférence jusqu'à 1 % en poids.zirconia (ZrO 2 ), preferably up to 10% by weight. Optionally, the glass according to the invention may be colored and comprises for this purpose one or more metal coloring oxides chosen from the group including cerium oxide (CeO 2 ), preferably up to 5% by weight, the oxide iron (Fe 2 O 3 ), preferably up to 2% by weight, nickel oxide (NiO), preferably up to 1% by weight, and cobalt oxide (CoO), preferably up to 1% by weight.
La présente invention est également relative à un procédé d'imprégnation à l'aide d'un verre d'une infrastructure frittée à pores ouverts constituée de particules d'au moins un oxyde métallique pour la fabrication de prothèses dentaires céramiques, essentiellement caractérisé par le fait que l'on met en contact l'infrastructure avec un verre tel que défini précédemment, à l'état liquide à une température comprise entre 1000 0C et 1250 0C pendant un temps compris entre 20' et 3 h, le verre s'infiltrant dans l'infrastructure qui constitue le squelette de la prothèse et occupant la totalité des pores ouverts que cette infrastructure comporte.The present invention also relates to a process for impregnating, using a glass, an open-pore fritted framework consisting of particles of at least one metal oxide for the manufacture of ceramic dental prostheses, essentially characterized by the that the infrastructure is brought into contact with a glass as defined above, in the liquid state at a temperature between 1000 0 C and 1250 0 C for a time between 20 'and 3 h, the glass s infiltrating the infrastructure that constitutes the skeleton of the prosthesis and occupies all the open pores that this infrastructure contains.
L'infrastructure selon l'invention est avantageusement constituée de particules d'alumine pure (Al2O3) ou de particules de zircone pure (ZrO2) ou d'un mélange de celles- ci.The infrastructure according to the invention is advantageously composed of particles of pure alumina (Al 2 O 3 ) or particles of pure zirconia (ZrO 2 ) or a mixture thereof.
La dimension moyenne des particules est de préférence comprise entre 0,5 μm et 20 μm. Par infrastructure frittée au sens de la présente invention, on entend un réseau à pores ouverts formé de particules d'oxydes métalliques liées entre elles par un léger frittage en phase solide, le frittage ayant lieu sans provoquer un retrait notable du volume de l'infrastructure.The average particle size is preferably between 0.5 μm and 20 μm. For the purposes of the present invention, sintered infrastructure is understood to mean an open-pore network formed of metal oxide particles bonded together by a slight solid-phase sintering, the sintering taking place without causing a significant shrinkage of the volume of the infrastructure. .
Selon l'invention, l'imprégnation de l'infrastructure à l'aide du verre à base d'oxydes métalliques peut être mise en œuvre sous vide ou à l'air libre.According to the invention, the impregnation of the infrastructure using glass based on metal oxides can be carried out under vacuum or in the open air.
L'imprégnation peut par exemple s'effectuer en disposant dans une coupelle un lit de poudre de verre sur lequel on pose l'infrastructure puis on porte l'ensemble à la température désirée. Le verre fondu pénètre par capillarité dans les pores de la structure jusqu'à occuper la totalité des pores de l'infrastructure.The impregnation can for example be carried out by placing in a cup a bed of glass powder on which the infrastructure is placed and then the whole is brought to the desired temperature. The molten glass penetrates capillary into the pores of the structure until it occupies all the pores of the infrastructure.
L'infrastructure peut être réalisée par différents procédés.The infrastructure can be realized by different methods.
On peut en particulier mettre en œuvre celui décrit dans le document EP 0 241 384 ou une variante de celui-ci dans laquelle le dépôt de l'infrastructure sur un modèle en plâtre de la dent peut s'effectuer par électrophorèse.In particular it is possible to implement the one described in EP 0 241 384 or a variant thereof in which the deposition of the infrastructure on a plaster model of the tooth can be performed by electrophoresis.
L'infrastructure peut également par exemple être fabriquée par compression uniaxiale ou isostatique d'une poudre, suivie d'un frittage partiel du bloc de poudre agglomérée, et enfin par usinage du bloc notamment par une fraiseuse numérique.The infrastructure may also for example be manufactured by uniaxial or isostatic compression of a powder, followed by partial sintering of the block of agglomerated powder, and finally by machining the block in particular by a digital milling machine.
On va maintenant décrire quelques exemples nullement limitatifs de mise en œuvre de l'invention.We will now describe some non-limiting examples of implementation of the invention.
Exemple 1Example 1
On a réalisé l'imprégnation d'une infrastructure frittée en alumine (Al2O3) pure en la mettant au contact sous vide avec un verre non coloré à une température de 1150 0C et pendant un temps de 20', le verre présentant la composition en poids suivante :Impregnation of a pure alumina (Al 2 O 3 ) sintered structure was made by contacting it under vacuum with an uncoloured glass at a temperature of 1150 ° C. and for a time of 20 ', the glass presenting the following composition by weight:
- silice (SiO2) 10 % 10 %silica (SiO 2 ) 10% 10%
- alumine (Al2O3) 9 %alumina (Al 2 O 3 ) 9%
- oxyde de bore (B2O3) 10 % oxyde de lanthane (La2O3) 50 % oxyde de titane (TiO2) 6 %- boron oxide (B 2 O 3 ) 10% lanthanum oxide (La 2 O 3 ) 50% titanium oxide (TiO 2 ) 6%
- oxyde d'ytterbium (Yb2O3) 15 %- Ytterbium oxide (Yb 2 O 3 ) 15%
Exemple 2 On a réalisé l'imprégnation d'une infrastructure frittée comportant en poids 66 % d'alumine (AI2O3) pure et 34 % de zircone (ZrO2) pure en la mettant au contact sous vide avec un verre non coloré à une température de 1100 0C et pendant un temps de 40', le verre présentant la composition en poids suivante :Example 2 The impregnation of a sintered framework comprising by weight 66% of pure alumina (Al 2 O 3) and 34% of pure zirconia (ZrO 2 ) was carried out by contacting it under vacuum with an uncoloured glass at a temperature of 1100.degree. 0 C and for a time of 40 ', the glass having the following composition by weight:
- silice (SiO2) 15 %- silica (SiO 2 ) 15%
- alumine (Al2O3) 15 %- alumina (Al 2 O 3 ) 15%
- oxyde de bore (B2O3) 15 % oxyde de lanthane (La2O3) 40 %- boron oxide (B 2 O 3 ) 15% lanthanum oxide (La 2 O 3 ) 40%
- oxyde de titane (TiO2) 10 %- titanium oxide (TiO 2 ) 10%
- oxyde d'ytterbium (Yb2O3) 5 %- Ytterbium oxide (Yb 2 O 3 ) 5%
Exemple 3Example 3
On a réalisé l'imprégnation de la même infrastructure que celle de l'exemple 2 en la mettant au contact à l'air avec un verre coloré à une température de 1130 0C pendant un temps de 3 h, le verre présentant la composition en poids suivante :The impregnation of the same infrastructure as that of Example 2 was carried out by putting it in contact with air with a colored glass at a temperature of 1130 ° C. for a time of 3 hours, the glass having the composition of following weight:
- silice (SiO2) 15 %- silica (SiO 2 ) 15%
- alumine (Al2O3) 10 %- alumina (Al 2 O 3 ) 10%
- oxyde de bore (B2O3) 15 % oxyde de lanthane (La2O3) 40 % oxyde de titane (TiO2) 6 %- boron oxide (B 2 O 3 ) 15% lanthanum oxide (La 2 O 3 ) 40% titanium oxide (TiO 2 ) 6%
- oxyde d'ytterbium (Yb2O3) 5 %- Ytterbium oxide (Yb 2 O 3 ) 5%
- zircone (ZrO2) 4 % oxyde de cérium (CeO2) 3 %- zirconia (ZrO 2 ) 4% cerium oxide (CeO 2 ) 3%
- oxyde de fer (Fe2O3) 1 %iron oxide (Fe 2 O 3 ) 1%
- oxyde de nickel (NiO) 0,5 %- nickel oxide (NiO) 0.5%
- oxyde de cobalt (CoO) 0,5 %- cobalt oxide (CoO) 0.5%
Exemple 4Example 4
On a réalisé l'imprégnation d'une infrastructure frittée en zircone (ZrO2) pure en la mettant au contact à l'air avec un verre coloré à une température de 1180 0C pendant un temps de 1 h, le verre présentant la composition en poids suivante :Impregnation of a pure zirconia (ZrO 2 ) sintered structure was made by contacting it with air with a colored glass at a temperature of 1180 ° C. for a time of 1 h, the glass having the composition in following weight:
- silice (SiO2) 11 % - alumine (Al2O3) 8 %silica (SiO 2 ) 11% - alumina (Al 2 O 3 ) 8%
- oxyde de bore (B2O3) 11 % oxyde de lanthane (La2O3) 40 % oxyde de titane (TiO2) 6 %- boron oxide (B 2 O 3 ) 11% lanthanum oxide (La 2 O 3 ) 40% titanium oxide (TiO 2 ) 6%
- oxyde d'ytterbium (Yb2O3) 5 %- Ytterbium oxide (Yb 2 O 3 ) 5%
- zircone (ZrO2) 10 % oxyde de cérium (CeO2) 5 %- zirconia (ZrO 2 ) 10% cerium oxide (CeO 2 ) 5%
- oxyde de fer (Fe2O2) 2 % oxyde de nickel (NiO) 1 %- iron oxide (Fe 2 O 2 ) 2% nickel oxide (NiO) 1%
- oxyde de cobalt (CoO) 1 %- cobalt oxide (CoO) 1%
Bien que l'invention ait été décrite en liaison avec des modes de réalisation particuliers, il est bien évident qu'elle n'y est nullement limitée et qu'on peut lui apporter différentes variantes et modifications sans pour autant sortir de sa portée telle que définie dans les revendications suivantes. Although the invention has been described in connection with particular embodiments, it is obvious that it is not limited thereto and that it can be given various variants and modifications without departing from its scope such that defined in the following claims.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0653100 | 2006-07-25 | ||
| FR0653100A FR2904306B1 (en) | 2006-07-25 | 2006-07-25 | GLASS BASED ON METAL OXIDES FOR THE MANUFACTURE OF CERAMIC DENTAL PROSTHESES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2008012467A2 true WO2008012467A2 (en) | 2008-01-31 |
| WO2008012467A3 WO2008012467A3 (en) | 2008-04-03 |
Family
ID=37768673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2007/051709 WO2008012467A2 (en) | 2006-07-25 | 2007-07-23 | Metal oxides based glass for the manufacture of ceramic dental prostheses |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2904306B1 (en) |
| WO (1) | WO2008012467A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008141188A1 (en) * | 2007-05-11 | 2008-11-20 | 3M Innovative Properties Company | Method of making ceramic articles from glass |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2935897B1 (en) | 2008-09-12 | 2010-12-03 | Michael Sadoun | COMPOSITE CERAMIC BLOCK. |
| FR2957776B1 (en) | 2010-03-23 | 2013-02-15 | Arnaud Andre Soubeiran | DEVICE FOR MOVING TISSUES INSIDE THE ORGANISM, ESPECIALLY BONE TISSUES, WITH FIXED TRACTION SCREWS AND ROTATING NUT |
| FR3048354B1 (en) | 2016-03-04 | 2021-12-10 | Michael Sadoun | PREFORM INTENDED FOR THE MANUFACTURE OF A DENTAL PROSTHESIS |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2682297A1 (en) * | 1991-10-15 | 1993-04-16 | Tyszblat Michele | Wholly ceramic dental prosthesis based on alumina/magnesia spinel and process for its manufacture |
| AU683050B2 (en) * | 1993-06-24 | 1997-10-30 | Dentsply Gmbh | Dental prosthesis |
| WO2003035014A1 (en) * | 2001-10-25 | 2003-05-01 | Vita Zahnfabrik H. Rauter Gmbh & Co. Kg | System for producing a veneering ceramic |
| US7175700B2 (en) * | 2004-07-02 | 2007-02-13 | Den-Mat Corporation | Ytterbium-barium silicate radiopaque glasses |
-
2006
- 2006-07-25 FR FR0653100A patent/FR2904306B1/en not_active Expired - Fee Related
-
2007
- 2007-07-23 WO PCT/FR2007/051709 patent/WO2008012467A2/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008141188A1 (en) * | 2007-05-11 | 2008-11-20 | 3M Innovative Properties Company | Method of making ceramic articles from glass |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2904306A1 (en) | 2008-02-01 |
| FR2904306B1 (en) | 2008-11-07 |
| WO2008012467A3 (en) | 2008-04-03 |
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