Classifications

• • 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
  • A61K6/836—Glass
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C13/00—Dental prostheses; Making same
  • A61C13/08—Artificial teeth; Making same
  • A61C13/083—Porcelain or ceramic teeth
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C19/00—Dental auxiliary appliances
  • A61C19/04—Measuring instruments specially adapted for dentistry
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C19/00—Dental auxiliary appliances
  • A61C19/04—Measuring instruments specially adapted for dentistry
  • A61C19/045—Measuring instruments specially adapted for dentistry for recording mandibular movement, e.g. face bows
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C19/00—Dental auxiliary appliances
  • A61C19/04—Measuring instruments specially adapted for dentistry
  • A61C19/05—Measuring instruments specially adapted for dentistry for determining occlusion
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C5/00—Filling or capping teeth
  • A61C5/70—Tooth crowns; Making thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C9/00—Impression cups, i.e. impression trays; Impression methods
  • A61C9/004—Means or methods for taking digitized impressions
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C9/00—Impression cups, i.e. impression trays; Impression methods
  • A61C9/004—Means or methods for taking digitized impressions
  • A61C9/0046—Data acquisition means or methods
  • A61C9/0053—Optical means or methods, e.g. scanning the teeth by a laser or light beam
• • 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
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K6/00—Preparations for dentistry
  • A61K6/70—Preparations for dentistry comprising inorganic additives
  • A61K6/71—Fillers
  • A61K6/77—Glass
• • 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
  • C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
  • C03C10/0018—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and monovalent metal oxide as main constituents
• • 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
  • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
  • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
  • C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
  • C03C3/093—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium containing zinc or zirconium
• • 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
  • C03C4/00—Compositions for glass with special properties
  • C03C4/0007—Compositions for glass with special properties for biologically-compatible glass
  • C03C4/0021—Compositions for glass with special properties for biologically-compatible glass for dental use
• • 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
  • C03C8/04—Frit compositions, i.e. in a powdered or comminuted form containing zinc
• • 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
  • C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
  • C03C8/16—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions with vehicle or suspending agents, e.g. slip

Definitions

• the present invention is used for prosthetic restoration of artificial teeth having an aesthetic appearance close to that of natural teeth, has good operability during manual construction by a dental technician, and may turn black or gray after firing. Not related to pasty dental glass compositions.
• Ceramic has a transparency and color tone similar to that of natural teeth, so it is an indispensable material for making crowns that require aesthetics.
• a dental kneading solution generally composed of porcelain, water, an organic solvent, etc., or a porcelain made into a paste by mixing ceramic with water, an organic solvent, etc. in advance is used as an abutment.
• a crown is produced by repeating the operation of building and firing a frame (for example, a metal frame or a ceramic frame) that covers a tooth.
• a frame for example, a metal frame or a ceramic frame
• a solvent with low volatility is used so that water, organic solvent, etc. evaporate and the porcelain does not dry when working by a dental technician.
• fine glass powder is generally used as the ceramic material, the solvent is well-adapted to the powder, and it is required to adjust the paste properties so that the dental technician can work with good operability.
• discoloration after firing mainly discoloration from gray to black
• Patent Document 1 describes synthesis and / or synthesis in one or more organic solvents and / or water selected from divalent and trivalent alcohols, ethers with residual hydroxyl groups, and hydroxy (meth) acrylates.
• organic solvents and / or water selected from divalent and trivalent alcohols, ethers with residual hydroxyl groups, and hydroxy (meth) acrylates.
• a dental paste-like porcelain containing a component in which a polymer material having a natural hydrophilic group is dissolved is disclosed, and it is proposed that the polymer material is efficiently decomposed and burned after the porcelain is built.
• Patent Document 2 discloses a dental paste-like ceramic material containing a colorant, an organic solvent, and a ceramic material powder that decolorizes during firing, and the organic substance does not remain after firing and the color does not change. Has been proposed.
• Patent Documents 1 and 2 it was found that there is a problem that organic matter remains after firing and the color changes to black or gray depending on the firing temperature after the porcelain is built. Further, depending on the organic solvent (for example, glycerin (boiling point: 290 ° C.)) or polymer material (for example, methyl cellulose) selected, a condensation reaction with a boron component contained in the ceramic powder may occur during firing after the ceramic material is built. It has been found that there is a problem that a polymerization reaction occurs and an organic substance remains after firing and the color changes to black or gray.
• organic solvent for example, glycerin (boiling point: 290 ° C.)
• polymer material for example, methyl cellulose
• the present invention provides a paste-like dental glass composition which can accurately adjust the color tone without discoloring to black or gray after firing, suppresses dripping of the paste, and has good operability.
• the purpose is to do.
• the present invention includes the following inventions.
• the glass powder (A) and an organic solvent (B) having two or less hydroxyl groups in the molecule and having a viscosity at 20 ° C. of 2500 mPa ⁇ s or less are contained, and three or more hydroxyl groups are contained in the molecule.
• a paste-like dental glass composition that is substantially free of organic compounds having.
• An organic compound (C-1) further containing a thickener (C), wherein the thickener (C) has a viscosity of more than 2500 mPa ⁇ s at 20 ° C. and an organic compound (C-1) which is solid at room temperature.
• the dihydric alcohol compound having a branched chain having 3 to 20 carbon atoms is 1-methyl-1,3-propanediol, 2-methyl-1,3-propanediol, 2-methyl-1,4-.
• a method for producing a dental prosthesis which comprises a step of firing the paste-like dental glass composition according to any one of [1] to [9] at 700 to 1050 ° C. [11] A step of mixing the glass powder (A) and the organic solvent (B) having two or less hydroxyl groups in the molecule and having a viscosity at 20 ° C. of 2500 mPa ⁇ s or less is included [1] to [ 9] The method for producing a paste-like dental glass composition according to any one of.
• the paste-like dental glass composition of the present invention has good operability because organic substances do not remain and the color does not change after firing, the color tone can be adjusted accurately, and the dripping of the paste is suppressed.
• the color tone of the porcelain can be easily adjusted.
• the paste-like dental glass composition of the present invention does not dry the paste at the time of erection and is excellent in operability.
• the paste-like dental glass composition of the present invention has a glass powder (A) and an organic solvent (B) having two or less hydroxyl groups in the molecule and having a viscosity at 20 ° C. of 2500 mPa ⁇ s or less (hereinafter, It contains (sometimes referred to simply as "organic solvent (B)”) and substantially does not contain an organic compound having three or more hydroxyl groups in the molecule.
• the paste-like dental glass composition of the present invention has good aesthetics after firing, and is in a state of burning out by firing. Burn-out means that (1) the color tone after firing is not darkened by residual organic substances, and (2) it does not contain large bubbles after firing.
• the glass powder (A) used in the paste-like dental glass composition of the present invention is not particularly limited as long as it can be used as a dental glass composition, and may contain crystals.
• the material of the glass powder for example, glass containing SiO 2 as a main component (material having the highest content (for example, 45% by mass or more, 50% by mass or more, 55% by mass or more)) or crystallized glass is used.
• SiO 2 such glass contains Al 2 O 3 , B 2 O 3 , ZnO, K 2 O, Na 2 O, Li 2 O, ZrO 2 , CaO, MgO, Sb 2 O 3 , and the like. You may.
• the content of SiO 2 may be 55 to 75% by mass, 57 to 72% by mass, or 58 to 70% by mass.
• the content of Al 2 O 3 may be 3 to 18% by mass, 3.5 to 16% by mass, or 4 to 15% by mass.
• the content of B 2 O 3 may be 0 to 25% by mass, 0 to 20% by mass, or 0 to 18% by mass.
• the ZnO content may be 0 to 5% by mass, 0 to 3% by mass, or 0 to 1% by mass.
• the content of K 2 O may be 0 to 10% by mass, 0 to 9% by mass, or 0 to 8% by mass.
• the content of Na 2 O may be 0 to 10% by mass, 1 to 9% by mass, or 1 to 8% by mass.
• the content of Li 2 O may be 0 to 1.5% by mass, 0 to 1.0% by mass, or 0 to 0.9% by mass.
• the CaO content may be 0 to 10% by mass, 0 to 9% by mass, or 0 to 8% by mass.
• the content of ZrO 2 may be 0 to 5% by mass, 0 to 4% by mass, or 0 to 3% by mass.
• the content of MgO may be 0 to 10% by mass, 0 to 9% by mass, or 0 to 8% by mass.
• the content of Sb 2 O 3 may be 0 to 3% by mass, 0 to 2% by mass, or 0 to 1% by mass.
• at least one of amorphous type potassium aluminosilicate glass ( 4SiO 2 ⁇ Al 2O3 ⁇ K2O ), leucite crystal type potassium aluminosilicate glass, fluoroapatite glass, and lithium silicate glass is used. can do.
• leucite crystal type potassium aluminosilicate glass is particularly preferable.
• crystals examples include leucite, potassium feldspar, phlogopite fluorine, diopside, mica, ⁇ -spojumen (LiAlSi 2 O 6 ), ⁇ -calcium metaphosphate, apatite, magnesium titanate, and ⁇ -eucryptite. Examples include tight and alumina.
• the glass powder (A) may be used alone or in combination of two or more, depending on the use of porcelain for metal baking, all ceramics, laminated veneers and the like.
• the raw material of the glass powder (A) a widely used ceramic raw material can be used, and SiO 2 , Al 2 O 3 , B 2 O 3 , ZnO, K 2 O, and Na 2 can be used.
• Each component itself such as O, Li 2 O, ZrO 2 , CaO, MgO, Sb 2 O 3 , CeO 2 , BaO, SnO 2 and / or a substance that can become the above component when heated in the atmosphere.
• the glass composition obtained in advance is obtained by calculation, and each raw material formulation is determined and mixed.
• the method of mixing the raw material is not particularly limited, and it is preferable that the raw material is uniformly dispersed.
• the mixed raw material is heat-treated at about 700 ° C or higher to form glass.
• the method of heat treatment is not particularly limited, and it is sufficient as long as all the mixed raw material substances are dissolved to form a uniform amorphous substance and sublimation of the components does not occur.
• the subsequent method for cooling the melt is not particularly limited, and air cooling or the like can be used.
• the glass block thus obtained is crushed and classified into a powder having an adjusted particle size.
• the method of crushing and classifying glass ingots is not particularly limited, and examples of the crushing device include compression crushers such as jaw crushers and cone crushers; ball mills such as vibration ball mills and planetary mills; tower crushers, etc. Medium stirring type crushers such as stirring tank type crushers and annual type crushers; high-speed rotary impact crushers such as pin mills and disc mills; other roll mills, jet crushers, self-made crushers and the like.
• Examples of the classification device include a vibration sieve, a sieve classifier such as a shifter, a centrifugal classifier such as a cyclone, a wet classifier such as a settling classifier, and the like. In these crushing devices or classifying devices, it is preferable to use devices coated with resin, glass, or the like in order to avoid mixing of metal impurities.
• the components and contents contained in the glass powder (A) are not particularly limited, but firing at a lower temperature is possible and the firing time can be shortened by lowering the glass transition temperature or the softening point. Therefore, it is preferable to contain a boron component.
• a boron component since the condensation reaction and the polymerization reaction with the boron component can be suppressed, even if the content of the boron component of the glass powder (A) is large, no organic substance remains after firing and the color changes to black or gray. There is no.
• the content of the boron component is 2.0% by mass or more, further 5.0% by mass or more, further 10% by mass or more, and further 15% by mass or more with respect to the entire glass powder (A).
• no organic matter remains after firing, and the color does not change to black or gray.
• the glass transition temperature of the glass powder (A) is preferably 400 to 600 ° C, more preferably 420 to 580 ° C, and 450 to 550 ° C from the viewpoint that firing at a lower temperature is possible and the firing time can be shortened. More preferred. From the same viewpoint, the softening point of the glass powder (A) is preferably 500 to 680 ° C, more preferably 520 to 650 ° C, and even more preferably 550 to 630 ° C. If the glass transition temperature is less than 400 ° C or the softening point is less than 500 ° C, there is a risk of dripping during firing. Further, when the glass transition temperature is higher than 600 ° C.
• the softening point is higher than 680 ° C., firing at a low temperature cannot be performed and firing at a high temperature is required. Ceramics made of lithium disilicate-based glass ceramics or the like. The frame may be deformed. The method for measuring the glass transition temperature and the softening point is as described in Examples described later.
• the coefficient of linear thermal expansion (50 to 500 ° C.) of the glass powder (A) can be appropriately selected depending on the material of the abutment tooth, the material of the frame, etc., and is not particularly limited, but 4.0 ⁇ 10 -6 to 6. It may be about 0 ⁇ 10 -6 / ° C. In another embodiment, the coefficient of linear thermal expansion (50 to 500 ° C.) of the glass powder (A) may be about 6.1 ⁇ 10 -6 to 13.5 ⁇ 10 -6 / ° C. It may be about 6.3 ⁇ 10 -6 to 12.5 ⁇ 10 -6 / ° C.
• a paste-like dental glass composition when used as a dental porcelain for a frame containing zirconia as a main component (for example, 50% by mass or more and 70% by mass or more), 9.0 ⁇ 10-6 to It is preferably about 11.0 ⁇ 10 -6 / ° C.
• a paste-like dental glass composition is used as a dental porcelain for a frame containing alumina as a main component (for example, 50% by mass or more and 70% by mass or more), 6.1 ⁇ 10 -6 to 8. It is preferably about 8 ⁇ 10 -6 / ° C.
• the coefficient of linear thermal expansion can be measured by heating a sample from room temperature to 500 ° C.
• thermomechanical analyzer TMA8311 manufactured by Rigaku Co., Ltd., heating rate 5 ° C./min.
• the coefficient of linear thermal expansion can be adjusted by a known method, and can be adjusted by, for example, the content of K2O .
• the glass powder (A) may contain a pigment such as an inorganic pigment or an emulsion material.
• a pigment such as an inorganic pigment or an emulsion material.
• the inorganic pigment contained in the glass powder (A) include placeodim oxide, vanadium oxide, iron oxide, nickel oxide, chromium oxide, manganese oxide, cerium oxide, and tin oxide compounds (for example, tin (II) oxide and tin oxide).
• tin oxide (IV) complex oxide containing tin oxide (IV) (eg vanadium tin yellow, chromium tin pink, etc.), bismuth vanadium yellow, vanadium zirconium yellow, placeodim yellow, cobalt blue, manganese pink, chromium alumina pink , Chromium iron zinc, titanium oxide (TIO 2 ), zirconium oxide (ZrO 2 ) and the like.
• the emulsion include zirconium silicate, tin (IV) oxide, zirconium oxide (ZrO 2 ), zinc oxide, titanium oxide (TIO 2 ), aluminum oxide and the like. These are appropriately contained according to the desired color tone.
• the pigment one kind may be used alone, or two or more kinds may be used in combination.
• the glass powder (A) may be surface-treated with a surface-treating agent.
• the surface treatment agent include a silane coupling agent and the like.
• the silane coupling agent is not particularly limited, but is limited to methyltrimethoxysilane, dimethyldimethoxysilane, phenyltrimethoxysilane, diphenyldimethoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, phenyltriethoxysilane, diphenyldiethoxysilane, and the like.
• the glass powder (A) a commercially available product can also be used. As a commercially available product, it may contain an inorganic pigment. When a commercially available product containing no inorganic pigment is used as the glass powder (A), the inorganic pigment can be added to the commercially available product for use.
• Commercially available products that can be used as glass powder (A) containing inorganic pigments include Cerabian (registered trademark) ZR (trademark, manufactured by Clarenoritake Dental Co., Ltd.) and Cerabian (registered trademark) ZR Press (trademark, Clarenoritake Dental Co., Ltd.). (Made by company), etc.
• the content of the glass powder (A) is not particularly limited, but is preferably 50 to 90% by mass, more preferably 52 to 88% by mass, and 54 to 84 with respect to the entire paste-like dental glass composition of the present invention. % By mass is more preferred. If the content exceeds 90% by mass, the kneadability of the glass powder (A) and the organic solvent (B) is lowered, and there is a possibility that it is difficult to make a paste. On the other hand, if the content of the glass powder is less than 50% by mass, the viscosity of the kneaded product of the glass powder and the organic solvent may decrease, and the operability at the time of building may deteriorate.
• the upper limit value and the lower limit value of the numerical range are not particularly limited as long as the effect of the present invention is not impaired, and are appropriate. Can be combined.
• the particle size of the glass powder (A) can be set according to the site of use and is not particularly limited, but is preferably 1.0 to 10 ⁇ m.
• the average particle size of the powder of the glass powder (A) contained in the paste-like dental glass composition is preferably 3.0 to 10 ⁇ m.
• the average particle size of the powdered porcelain for stain is preferably 1.0 to 7.0 ⁇ m.
• the average particle size of the glass powder (A) can be determined by measurement using the laser diffraction / scattering method.
• the laser diffraction / scattering method is specifically measured by a laser diffraction type particle size distribution measuring device (SALD-2300: manufactured by Shimadzu Corporation) using a 0.2% aqueous sodium hexametaphosphate solution as a dispersion medium on a volume basis. be able to.
• SALD-2300 manufactured by Shimadzu Corporation
• the organic solvent (B) needs to be an organic solvent having two or less hydroxyl groups in the molecule in order to suppress the condensation reaction and the polymerization reaction with the boron component contained in the glass powder.
• an organic solvent having three or more hydroxyl groups in the molecule is used, the condensation reaction and the polymerization reaction with the boron component contained in the glass powder proceed during the firing after firing, and the burning through is deteriorated, and the organic substance is discharged after firing. It remains and changes color to black or gray. Therefore, the organic solvent (B) does not substantially contain an organic solvent having three or more hydroxyl groups in the molecule.
• the content of the organic solvent having three or more hydroxyl groups in the molecule can be, for example, 1000 mass ppm or less and 100 mass ppm or less with respect to the mass of the pasty dental glass composition. It is preferably 10 mass ppm or less, more preferably 1 mass ppm or less, particularly preferably 0.1 mass ppm or less, and most preferably 0 mass ppm.
• Examples of the organic solvent having three or more hydroxyl groups in the molecule include trihydric alcohols such as glycerin, 1,2,4-butanetriol, 1,2,3-butanetriol and 1,2,6-hexanetriol. Examples include compounds.
• the organic solvent (B) has a viscosity at 20 ° C. of 2500 mPa. It is s or less, and is preferably 2100 mPa ⁇ s or less, more preferably 1700 mPa ⁇ s or less, and even more preferably 1300 mPa ⁇ s or less, from the viewpoint of kneadability and viscosity of the paste.
• the organic solvent (B) of the present invention needs to burn out more sufficiently to the extent that it does not affect the color tone after firing, so that the boiling point is preferably 350 ° C. or lower, preferably 320 ° C. or lower. Is more preferable, and those having a temperature of 300 ° C. or lower are further preferable, and those having a temperature of 280 ° C. or lower are particularly preferable. Further, if an organic solvent having a boiling point of less than 100 ° C. is used, the organic solvent volatilizes even at room temperature and the paste is dried, which makes it difficult to stably maintain the properties of the paste, and the operability required at the time of building is improved. An organic solvent having a boiling point of 100 ° C.
• the organic solvent (B) preferably has a boiling point of 100 to 350 ° C, more preferably 100 to 320 ° C, still more preferably 100 to 300 ° C, and 100 to 280 ° C. Is particularly preferable.
• Examples of the organic solvent (B) of the present invention include a dihydric alcohol compound and a monohydric alcohol compound.
• Examples of the dihydric alcohol compound include 1,2-ethanediol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, and 1,4-butanediol.
• Divalent alcohol compound having a straight chain 1-methyl-1,3-propanediol, 2-methyl-1,3-propanediol, 2-methyl-1,4-butanediol, 3-methyl-1 , 3-Butandiol, 2-Methyl-2,4-Pentanediol, 3-Methyl-1,5-Pentanediol, 2,4-Diethyl-1,5-Pentanediol, 2-Ethyl-1,3-hexane
• Examples of the monohydric alcohol compound include methanol, ethanol, 1-propanol, 2-propanol, isopropanol, 1-butanol, 2-butanol, 1-heptanol, 2-heptanol, 3-heptanol, 1-hexanol and 2-hexanol.
• Monohydric alcohol compounds ethylene glycol monobenzyl ether, ethylene glycol monophenyl ether, diethylene glycol monobenzyl ether, benzyl alcohol, 3- (benzyloxy) -1-propanol, 2- (benzyloxy) -1-butanol, 5-( Examples thereof include monohydric alcohol compounds having an aryl group having 6 to 14 carbon atoms such as benzyloxy) -1-pentanol. Of these, a dihydric alcohol compound is preferable, and a dihydric alcohol compound having a branched chain is more preferable, and 1-methyl-1,3-propanediol and 2- are preferable from the viewpoint of compatibility with the glass powder (A) and viscosity.
• Viscosity about 250 mPa ⁇ s
• 3-methyl-1,5-pentanediol (boiling point: about 250 ° C., viscosity at 20 ° C.: about 173 mPa ⁇ s)
• 2,4-diethyl-1,5-pentanediol (boiling point) : About 264 ° C., viscosity at 20 ° C.: about 1650 mPa ⁇ s)
• 2-ethyl-1,3-hexanediol (boiling point: about 244 ° C., viscosity at 20 ° C.: about 271 mPa ⁇ s) is particularly preferable.
• These organic solvents (B) can be used alone or in combination of two or more.
• the paste-like dental glass composition of the present invention in particular, by containing a divalent alcohol compound having a branched carbon structure, dripping of the paste can be suppressed and operability can be improved.
• the divalent alcohol compound has a branched chain having a predetermined carbon number, an appropriate polarity is generated, so that the compatibility with the glass powder is improved, and even if the carbon number is increased, it solidifies at room temperature. It is presumed that the paste does not dry when mixed with the glass powder and the dripping of the paste can be suppressed because the liquid property having an appropriate viscosity and boiling point can be maintained.
• the paste-like dental glass composition of the present invention may further contain a thickener (C).
• the thickener (C) excludes organic compounds having three or more hydroxyl groups in the molecule.
• the thickener (C) can be minimized by containing the organic solvent (B).
• the thickener (C) one type may be used alone, or two or more types may be used in combination.
• the thickener (C) used in the present invention includes an organic compound (C-1) having a viscosity at 20 ° C. higher than 2500 mPa ⁇ s, an organic compound (C-2) which is solid at room temperature, and an inorganic compound (C-3). ) Includes at least one selected from the group consisting of.
• the thickener (C) does not substantially contain an organic compound having three or more hydroxyl groups in the molecule for the same reason as described above.
• the content of the organic compound having three or more hydroxyl groups in the molecule can be, for example, 1000 mass ppm or less and 100 mass ppm or less with respect to the mass of the pasty dental glass composition. It is preferably 10% by mass or less, more preferably 1% by mass or less, particularly preferably 0.1% by mass or less, and most preferably 0% by mass.
• Examples of the organic compound having three or more hydroxyl groups in the molecule include polysaccharide compounds such as methyl cellulose, carboxycellulose, gidroxyethyl cellulose, xanthan gum, guar gum, carrageenan, tamarind seed gum, and pectin; sorbitol, erythritol, xylitol, and trehalose.
• polysaccharide compounds such as methyl cellulose, carboxycellulose, gidroxyethyl cellulose, xanthan gum, guar gum, carrageenan, tamarind seed gum, and pectin
• sorbitol, erythritol, xylitol, and trehalose Such as sugar alcohol compounds; synthetic polyol compounds such as diglycerin, triglycerin, polyglycerin, polyvinyl alcohol and the like can be mentioned.
• the paste-like dental glass composition of the present invention whether it is an organic solvent or
• organic compound (C-1) having a viscosity higher than 2500 mPa ⁇ s at 20 ° C. used in the present invention (hereinafter, may be simply referred to as “organic compound (C-1)”), good viscosity increase can be obtained.
• the compound is not particularly limited as long as it can be used, but for example, 2,2-bis [4- (3-acryloyloxy-2-hydroxypropoxy) phenyl] propane and 2,2-bis [4- (3- (methacryloyloxy-) 2-Hydroxypropoxy) Phenyl] Propane (commonly known as "Bis-GMA”), 2,2,4-trimethylhexamethylenebis (2-carbamoyloxyethyl) dimethacrylate (UDMA) and other radically polymerizable polyfunctional (meth) Acrylic; Silicone oils such as dimethyl silicone oil and methyl phenyl silicone oil can be mentioned.
• the upper limit of the viscosity of the organic compound (C-1) is not particularly limited, but if the viscosity is too high, the organic solvent (B) burns out. There is a possibility that the thickener (C) itself may not burn through, and the burnout may be aggravated, and the color tone after firing may be affected or bubbles may be generated.
• the viscosity at 20 ° C. may be 1500,000 mPa ⁇ s or less.
• the viscosity of the organic compound (C-1) at 20 ° C. is preferably 2700 mPa ⁇ s or more, more preferably 2900 mPa ⁇ s or more, and 3000 mPa ⁇ s or more. Is even more preferable.
• organic compound (C-2) which is solid at room temperature used in the present invention
• organic compound (C-2) examples include sodium polyacrylate and ammonium polyacrylate.
• Polyethylene oxide polyethylene glycol (molecular weight: 1000 or more), water-soluble high molecular weight compounds such as polyvinylpyrrolidone, low molecular weight fatty acid compounds and the like.
• the fatty acid compound include fatty acid metal salts having a fatty acid group having 10 to 30 carbon atoms such as calcium stearate, magnesium stearate, zinc stearate, and aluminum stearate; fatty acids such as polyethylene glycol fatty acid ester such as polyethylene glycol monostearate.
• Esters; fatty acids such as 12-hydroxystearic acid; fatty acid amides such as stearic acid amide, oleic acid amide, and ethylenebisoleic acid amide include compounds having a fatty acid group having 8 to 30 carbon atoms, and 10 to 28 carbon atoms.
• a compound having a fatty acid group of is preferable.
• the organic compound (C-2) contains an organic compound having no fluidity at room temperature, and further includes a paste-like organic compound having fluidity and a slurry-like organic compound, but has fluidity and has a temperature of 20 ° C.
• the organic compound having a viscosity of 1500,000 mPa ⁇ s or less is included in the organic compound (C-1).
• the content of the organic compound (C-1) or (C-2) can be minimized by the content of the organic solvent (B).
• the content of the organic compound (C-1) or the organic compound (C-2) is the paste-like dental glass.
• 0.01 to 10% by mass is preferable, 0.05 to 8.0% by mass is more preferable, and 0.1 to 6.0% by mass is further preferable.
• the content is 0.01% by mass or more, a thickening effect is obtained, the paste is less likely to drip, and the operability is better.
• the content is 10% by mass or less, the viscosity of the composition does not become too high, the paste properties are moderately soft, it becomes easier to apply, and it becomes easier to build uniformly.
• the paste-like dental glass composition contains the organic compound (C-1) or (C-2), if a large amount of the highly viscous component is blended, the burnout of the organic solvent (B) is inhibited.
• the organic compound (C-1) has a risk of worsening the burnout of the thickener (C) itself, such as a bad burnout, and has an effect on the color tone and a possibility of generating bubbles.
• the content of the organic compound (C-2) (when both the organic compound (C-1) and the organic compound (C-2) are contained, the organic compound (C-1) and the organic compound (C-2) The total content) is preferably less than the content of the organic solvent (B) in the entire paste-like dental glass composition.
• Examples of the inorganic compound (C-3) used in the present invention include inorganic oxide particles such as silica, alumina, titania, and zirconia, or composite oxide particles composed of these, calcium phosphate, hydroxyapatite, and yttrium fluoride. Examples thereof include itterbium fluoride, smectite (magnesium aluminum silicate), bentonite, and water glass (sodium silicate aqueous solution).
• silica, alumina, and titania particles produced by the flame thermal decomposition method are preferable, and for example, "Aerodil (registered trademark) OX50", “Aerodil (registered trademark) 50", and “Aerodil” manufactured by Nippon Aerodil Co., Ltd. are preferable.
• the inorganic compound (C-3) When the inorganic compound (C-3) is a particle, it may be surface-treated with a surface-treating agent.
• the surface treatment agent include a silane coupling agent and the like.
• the silane coupling agent is not particularly limited, but is limited to methyltrimethoxysilane, dimethyldimethoxysilane, phenyltrimethoxysilane, diphenyldimethoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, phenyltriethoxysilane, diphenyldiethoxysilane, and the like.
• the average particle size of the particles is preferably 1 to 50 nm, more preferably 5 to 40 nm, from the viewpoint of uniform dispersibility in the composition.
• the average particle size can be measured as an average value of the particle sizes of 100 randomly selected particles by taking an electron micrograph of the particles.
• the particle size is the arithmetic mean of the longest and shortest lengths of the filler particles, and when the particles are aggregated particles, the particle size is the primary particle.
• the shape of the particles is not particularly limited, and it can be used as a powder of amorphous or spherical particles.
• the content of the inorganic compound (C-3) can be minimized by the content of the organic solvent (B).
• the content of the inorganic compound (C-3) is 0.001 to 10% by mass with respect to the entire paste-like dental glass composition. Is preferable, 0.005 to 5.0% by mass is more preferable, 0.01 to 1.0% by mass is further preferable, and 0.05 to 0.4% by mass is particularly preferable.
• the content is 0.001% by mass or more, a thickening effect is obtained, the paste is less likely to drip, and the operability is better.
• the content of the paste-like dental glass composition contains an inorganic compound (C-3), if it is blended in a large amount, specific components (Si, Al, Ti, etc.) may affect the color tone, which is desired.
• the content of the inorganic compound (C-3) is preferably less than the content of the organic solvent (B) in the entire paste-like dental glass composition from the viewpoint that a color tone may not be obtained.
• the paste-like dental glass composition of the present invention further contains other components (optional) as long as the effects of the present invention are not impaired.
• Ingredients may be included. Examples of such other components include water, a colorant, a pH adjuster, a polymerization accelerator, a polymerization initiator and the like.
• the colorant may be amorphous or crystalline.
• the glass powder (A) may contain a crystalline powder as a colorant.
• the colorant include a colorant that decolorizes during firing.
• Examples of the colorant that decolorizes during firing include food dyes that are dissolved in an organic solvent. As edible pigments, Yellow No.
• the glass powder (A) and an organic solvent (B) having two or less hydroxyl groups in the molecule and having a viscosity at 20 ° C. of 2500 mPa ⁇ s or less are contained, and three or more in the molecule.
• examples thereof include a paste-like dental glass composition that does not substantially contain an organic compound having a hydroxyl group of the above and a colorant that decolorizes during firing.
• the fact that the colorant that decolorizes during firing is not substantially contained is as described for the content of the organic solvent having three or more hydroxyl groups in the molecule.
• the content of the other components is not particularly limited, but is preferably 15.0% by mass or less, and more preferably 12.0% by mass or less.
• the paste-like dental glass composition of the present invention can be used for producing dental prostheses such as ceramic inlays, onlays, laminated veneers, and crowns.
• the frame for which the paste-like dental glass composition of the present invention is to be built is not particularly limited, and examples thereof include a metal frame and a ceramic frame (for example, a zirconia frame).
• the use of the paste-like dental glass composition of the present invention is not particularly limited, and body porcelain (dentin-colored porcelain), cervical porcelain, incisal porcelain (enamel-colored porcelain), translucent porcelain, and opaque. It can be used as porcelain, stain porcelain, etc.
• the paste-like dental glass composition of the present invention is built and then fired.
• the firing temperature (maximum firing temperature) can be appropriately changed according to the type of porcelain, the mode of use, etc., and is not particularly limited as long as the color of the inorganic pigment can be developed. °C or higher is more preferable.
• the upper limit of the firing temperature is not particularly limited, but is preferably 1050 ° C or lower, more preferably 1000 ° C or lower, and even more preferably 980 ° C or lower.
• the rate of temperature rise during firing up to the maximum firing temperature can be appropriately changed depending on the type of porcelain, and is not particularly limited, but is preferably about 10 to 70 ° C./min, more preferably about 20 to 60 ° C./min.
• the paste-like dental glass composition of the present invention may be dried before firing after being built, and the drying conditions are not particularly limited. Further, in the firing after the paste-like dental glass composition of the present invention is built, the dental prosthesis obtained by significantly reducing the bubbles existing inside the glass composition is more transparent and more excellent. Vacuum firing may be performed under vacuum from the viewpoint of obtaining aesthetics. The degree of vacuum in vacuum firing is not particularly limited and may be 750 mmHg or less. The vacuum start temperature is not particularly limited and may be about 550 to 700 ° C.
• a suitable method for producing the paste-like dental glass composition of the present invention includes a production method including a step of mixing the glass powder (A) and the organic solvent (B).
• the mixing conditions are not particularly limited, and the components to be contained may be added all at once or may be added separately.
• a normal kneader can be used.
• a mortar, a twin-screw kneader (twin mix), a triaxial kneader (trimix), a kneader, a planetary mixer and the like can be mentioned. Of these, it is preferable to use a mortar and a planetary mixer.
• the paste-like dental glass composition of the present invention may be in the form of a paste that can be built up at the time of use, for example, a liquid component (first agent) containing an organic solvent (B) and a glass powder (A) are used. It may be provided as a dental porcelain kit composed of a powder component (second agent) contained therein, and the first agent and the second agent may be mixed immediately before use by the user to form a paste-like dental glass composition. In the form of such a kit, the type, content, boiling point, etc. of each component (A) and (B) can be appropriately changed based on the above description, and any component can be added or deleted. be able to.
• inventions include a glass powder (A) and an organic solvent for treating teeth (eg, aesthetic dental treatment, missing tooth treatment, prosthetic restoration treatment such as artificial teeth, caries treatment, etc.).
• an organic solvent for treating teeth eg, aesthetic dental treatment, missing tooth treatment, prosthetic restoration treatment such as artificial teeth, caries treatment, etc.
• the use of a paste-like dental glass composition containing (B) can be mentioned.
• each component can be appropriately changed based on the above description, and any component can be added, deleted, or the like. Further, in any of the above-described embodiments, the composition and characteristic values of each paste-like dental glass composition can be appropriately changed and combined.
• the present invention includes embodiments in which the above configurations are variously combined within the scope of the technical idea of the present invention as long as the effects of the present invention are exhibited.
• the glass powder (A) is prepared by mixing each raw material so as to have the components (unit: mass%) shown in Table 1 to prepare heat-treated and cooled glass, and crushed the glass powder (A-1), ( A-2), (A-3), or commercially available Cerabian® ZR External Stain Red (manufactured by Kuraray Noritake Dental Co., Ltd.) was used.
• the glass powder (A) and each component shown in Table 2 or 3 are mixed in a mortar at room temperature for about 10 minutes at the mass% shown in Table 2 or Table 3 to form a paste for dentistry.
• a glass composition was prepared. The components used are as follows.
• thickener (C) Thickeners other than thickener (C)
• Xanthan gum manufactured by Tokyo Chemical Industry Co., Ltd.
• light yellow solid methylcellulose manufactured by Tokyo Chemical Industry Co., Ltd.
• the viscosity of the paste is preferably 2000 to 80000 mPa ⁇ s, more preferably 3500 to 65000 mPa ⁇ s, further preferably 5000 to 55000 mPa ⁇ s, and particularly preferably 7000 to 45000 mPa ⁇ s.
• the dripping property of the paste is preferably 80 mm or less, more preferably 40 mm or less, further preferably 10 mm or less, and particularly preferably 5 mm or less.
• the paste-like dental glass composition of the present invention also suppresses dripping of the paste and has good operability, which facilitates the building work.
• the paste-like dental glass composition of the present invention is expected to increase. Is useful.

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• 2021
  • 2021-12-01 CN CN202180080983.2A patent/CN116546939A/zh active Pending
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