WO2023277042A1 - 歯科用硬化性組成物 - Google Patents
歯科用硬化性組成物 Download PDFInfo
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- WO2023277042A1 WO2023277042A1 PCT/JP2022/025853 JP2022025853W WO2023277042A1 WO 2023277042 A1 WO2023277042 A1 WO 2023277042A1 JP 2022025853 W JP2022025853 W JP 2022025853W WO 2023277042 A1 WO2023277042 A1 WO 2023277042A1
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- Prior art keywords
- dental
- curable composition
- meth
- zirconia
- group
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- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 140
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- FKTOIHSPIPYAPE-UHFFFAOYSA-N samarium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[Sm+3].[Sm+3] FKTOIHSPIPYAPE-UHFFFAOYSA-N 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- HYXGAEYDKFCVMU-UHFFFAOYSA-N scandium oxide Chemical compound O=[Sc]O[Sc]=O HYXGAEYDKFCVMU-UHFFFAOYSA-N 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- 229960004711 sodium monofluorophosphate Drugs 0.000 description 1
- WWYACYKHLMCNBG-UHFFFAOYSA-M sodium;2,4,6-tri(propan-2-yl)benzenesulfinate Chemical compound [Na+].CC(C)C1=CC(C(C)C)=C(S([O-])=O)C(C(C)C)=C1 WWYACYKHLMCNBG-UHFFFAOYSA-M 0.000 description 1
- KNHRGMOGYVTHPU-UHFFFAOYSA-M sodium;2,4,6-triethylbenzenesulfinate Chemical compound [Na+].CCC1=CC(CC)=C(S([O-])=O)C(CC)=C1 KNHRGMOGYVTHPU-UHFFFAOYSA-M 0.000 description 1
- GRBCNEIBDFNEES-UHFFFAOYSA-M sodium;2,4,6-trimethylbenzenesulfinate Chemical compound [Na+].CC1=CC(C)=C(S([O-])=O)C(C)=C1 GRBCNEIBDFNEES-UHFFFAOYSA-M 0.000 description 1
- KFZUDNZQQCWGKF-UHFFFAOYSA-M sodium;4-methylbenzenesulfinate Chemical compound [Na+].CC1=CC=C(S([O-])=O)C=C1 KFZUDNZQQCWGKF-UHFFFAOYSA-M 0.000 description 1
- CHLCPTJLUJHDBO-UHFFFAOYSA-M sodium;benzenesulfinate Chemical compound [Na+].[O-]S(=O)C1=CC=CC=C1 CHLCPTJLUJHDBO-UHFFFAOYSA-M 0.000 description 1
- 239000004334 sorbic acid Substances 0.000 description 1
- 229940075582 sorbic acid Drugs 0.000 description 1
- 235000010199 sorbic acid Nutrition 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 229910002076 stabilized zirconia Inorganic materials 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-L succinate(2-) Chemical compound [O-]C(=O)CCC([O-])=O KDYFGRWQOYBRFD-UHFFFAOYSA-L 0.000 description 1
- 125000004434 sulfur atom Chemical group 0.000 description 1
- 239000012756 surface treatment agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- KUCOHFSKRZZVRO-UHFFFAOYSA-N terephthalaldehyde Chemical compound O=CC1=CC=C(C=O)C=C1 KUCOHFSKRZZVRO-UHFFFAOYSA-N 0.000 description 1
- JIYXDFNAPHIAFH-UHFFFAOYSA-N tert-butyl 3-tert-butylperoxycarbonylbenzoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC(C(=O)OC(C)(C)C)=C1 JIYXDFNAPHIAFH-UHFFFAOYSA-N 0.000 description 1
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- ZIKATJAYWZUJPY-UHFFFAOYSA-N thulium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[Tm+3].[Tm+3] ZIKATJAYWZUJPY-UHFFFAOYSA-N 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 239000000606 toothpaste Substances 0.000 description 1
- 229940034610 toothpaste Drugs 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- GQIUQDDJKHLHTB-UHFFFAOYSA-N trichloro(ethenyl)silane Chemical compound Cl[Si](Cl)(Cl)C=C GQIUQDDJKHLHTB-UHFFFAOYSA-N 0.000 description 1
- ORVMIVQULIKXCP-UHFFFAOYSA-N trichloro(phenyl)silane Chemical compound Cl[Si](Cl)(Cl)C1=CC=CC=C1 ORVMIVQULIKXCP-UHFFFAOYSA-N 0.000 description 1
- ALVYUZIFSCKIFP-UHFFFAOYSA-N triethoxy(2-methylpropyl)silane Chemical compound CCO[Si](CC(C)C)(OCC)OCC ALVYUZIFSCKIFP-UHFFFAOYSA-N 0.000 description 1
- HXOGQBSDPSMHJK-UHFFFAOYSA-N triethoxy(6-methylheptyl)silane Chemical compound CCO[Si](OCC)(OCC)CCCCCC(C)C HXOGQBSDPSMHJK-UHFFFAOYSA-N 0.000 description 1
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 1
- UMFJXASDGBJDEB-UHFFFAOYSA-N triethoxy(prop-2-enyl)silane Chemical compound CCO[Si](CC=C)(OCC)OCC UMFJXASDGBJDEB-UHFFFAOYSA-N 0.000 description 1
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- XYJRNCYWTVGEEG-UHFFFAOYSA-N trimethoxy(2-methylpropyl)silane Chemical compound CO[Si](OC)(OC)CC(C)C XYJRNCYWTVGEEG-UHFFFAOYSA-N 0.000 description 1
- UBMUZYGBAGFCDF-UHFFFAOYSA-N trimethoxy(2-phenylethyl)silane Chemical compound CO[Si](OC)(OC)CCC1=CC=CC=C1 UBMUZYGBAGFCDF-UHFFFAOYSA-N 0.000 description 1
- JLGNHOJUQFHYEZ-UHFFFAOYSA-N trimethoxy(3,3,3-trifluoropropyl)silane Chemical compound CO[Si](OC)(OC)CCC(F)(F)F JLGNHOJUQFHYEZ-UHFFFAOYSA-N 0.000 description 1
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 description 1
- LFRDHGNFBLIJIY-UHFFFAOYSA-N trimethoxy(prop-2-enyl)silane Chemical compound CO[Si](OC)(OC)CC=C LFRDHGNFBLIJIY-UHFFFAOYSA-N 0.000 description 1
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 description 1
- ZESWBFKRPIRQCD-UHFFFAOYSA-N trimethoxy-(4-methoxyphenyl)silane Chemical compound COC1=CC=C([Si](OC)(OC)OC)C=C1 ZESWBFKRPIRQCD-UHFFFAOYSA-N 0.000 description 1
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- 239000005051 trimethylchlorosilane Substances 0.000 description 1
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
- AAPLIUHOKVUFCC-UHFFFAOYSA-N trimethylsilanol Chemical compound C[Si](C)(C)O AAPLIUHOKVUFCC-UHFFFAOYSA-N 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 239000005050 vinyl trichlorosilane Substances 0.000 description 1
- 238000004876 x-ray fluorescence Methods 0.000 description 1
- XASAPYQVQBKMIN-UHFFFAOYSA-K ytterbium(iii) fluoride Chemical compound F[Yb](F)F XASAPYQVQBKMIN-UHFFFAOYSA-K 0.000 description 1
- 229940105963 yttrium fluoride Drugs 0.000 description 1
- RBORBHYCVONNJH-UHFFFAOYSA-K yttrium(iii) fluoride Chemical compound F[Y](F)F RBORBHYCVONNJH-UHFFFAOYSA-K 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- 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
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/08—Artificial teeth; Making same
- A61C13/09—Composite teeth, e.g. front and back section; Multilayer teeth
-
- 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
- A61C5/73—Composite crowns
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/60—Preparations for dentistry comprising organic or organo-metallic additives
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/60—Preparations for dentistry comprising organic or organo-metallic additives
- A61K6/62—Photochemical radical initiators
-
- 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
- A61K6/76—Fillers comprising silicon-containing compounds
-
- 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
- A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
- A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
- A61K6/891—Compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- A61K6/893—Polyurethanes
-
- 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
- A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
- A61K6/891—Compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- A61K6/896—Polyorganosilicon compounds
Definitions
- the present invention relates to a dental curable composition and a dental prosthesis. More particularly, it relates to a dental curable composition coating a substrate and a dental prosthesis comprising a substrate and a resin layer.
- metals were often used as dental prostheses (eg, covering crowns, crowns, crowns, false teeth, etc.).
- metal has the drawback of lacking aesthetics, and may cause allergies due to metal elution. Therefore, in order to solve the problems associated with the use of metals, ceramic materials such as aluminum oxide (alumina), zirconium oxide (zirconia), quartz glass, lithium silicate glass, acrylic resins, polymer resins and inorganic fillers are used instead of metals.
- Ceramic materials and the like containing have been used in dental products.
- zirconia is excellent in terms of aesthetics and strength, and its demand is increasing, especially in conjunction with recent price reductions.
- an adhesive is applied on a high-strength ceramic frame that serves as a base material, and a polymerizable composition (commonly known as a dental composite resin) mainly composed of a polymerizable monomer, an inorganic filler, and a polymerization catalyst is applied.
- a polymerizable composition commonly known as a dental composite resin
- a polymerizable composition mainly composed of a polymerizable monomer, an inorganic filler, and a polymerization catalyst is applied.
- Patent Document 3 a (meth)acrylate monomer is coated with a composition containing inorganic fine particles whose surface is decorated with an alkoxysilane having an unsaturated double bond, and in Patent Document 4, an ⁇ -diketone compound, A method for protecting an aesthetic dental prosthesis or dentin by coating with a polymerizable monomer containing an amine compound and polymerizing and curing has been reported. Further, Patent Document 5 discloses a dental curable composition excellent in polishing lubricity, containing a polymerizable monomer, an inorganic filler, polyorganosilsesquioxane particles, and a polymerization initiator.
- a PFZ is made by applying a slurry containing a ceramic material that will become porcelain to a base material and then firing it at several hundred degrees Celsius to bake the porcelain material onto the base material. Therefore, in order to suppress the occurrence of defects during firing, it is necessary to select a porcelain material having a coefficient of thermal expansion close to that of the base material. For example, when using a zirconia sintered body as the base material, it is necessary to select a ceramic material having a thermal expansion coefficient close to that of the zirconia sintered body as the porcelain material.
- Patent Document 1 discloses a method for obtaining a prosthesis by coating with a polymerizable monomer to improve translucency of zirconia as a base material
- Patent Document 2 describes a method in which alumina is used as a base material.
- the described polymerizable monomer has sufficient durability to maintain the gloss under the poor environment of the oral cavity.
- the color tone of the resin layer covering the base material may change due to polymerization and curing, and in addition to transparency, the color tone when the base material is coated may be changed. There was room for improvement in controlling change.
- the photopolymerizable dental coating material composition described in Patent Document 3 has a problem that gelation occurs during storage and the surface curability decreases over time.
- the material composition has a problem of not being able to maintain sufficient durability to maintain the luster under the poor environment of the oral cavity, and no study has been made on the ceramic material.
- the dental curable composition described in Patent Document 5 is excellent in transparency and the like, there is room for further improvement in terms of glossiness in order to obtain an appearance equivalent to that of natural teeth. It has also been found that there is room for further improvement in the operability in building up the adhesive composition.
- An object of the present invention is to provide a dental curable composition which is excellent in operability, can suppress changes in the color tone of the base material, and gives a cured product with excellent lubricity and durability, and a dental prosthesis using the same. do.
- the inventors of the present invention have made intensive studies to solve the above problems, and found that a composition containing polysiloxane (C) in combination with other components in a dental curable composition is chemically compatible with a substrate.
- the present inventors have found that a coating layer formed by mechanical adhesion maintains appropriate hardness, glossiness and light reflection, and can easily maintain a natural glossiness in a dental prosthesis for a long period of time. Furthermore, based on this finding, the inventors further proceeded with the research and completed the present invention.
- the resin layer comprises a polymerizable compound (A), a polyfunctional thiol (B), a polysiloxane (C), and a polymerization initiator (D).
- a dental curable composition comprising a polymerizable compound (A), a polyfunctional thiol (B) having two or more mercapto groups in one molecule, a polysiloxane (C), and a polymerization initiator (D) thing.
- a dental curable composition comprising a polymerizable compound (A), a polyfunctional thiol (B) having two or more mercapto groups in one molecule, a polysiloxane (C), and a polymerization initiator (D) thing.
- the polysiloxane (C) comprises polysilsesquioxane (C-1).
- the dental curable composition according to [9], wherein the hydrophobic silica (E-1) has an average primary particle size of 5 to 100 nm.
- the substrate comprises at least one selected from the group consisting of zirconia, alumina, quartz glass, lithium silicate glass, acrylic resin, and a composite material containing a polymer resin and an inorganic filler.
- the zirconia contains zirconia and a stabilizer capable of suppressing phase transition of zirconia.
- a dental prosthesis comprising a substrate and a resin layer,
- the dental curable resin layer contains a polymerizable compound (A), a polyfunctional thiol (B) having two or more mercapto groups in one molecule, a polysiloxane (C), and a polymerization initiator (D).
- a dental prosthesis comprising a polymerized hardened product of the composition.
- the substrate comprises at least one selected from the group consisting of zirconia, alumina, quartz glass, lithium silicate glass, acrylic resin, and a composite material containing a polymer resin and an inorganic filler.
- the present invention it is possible to provide a dental curable composition which is excellent in operability, can suppress changes in color tone of the base material, and gives a cured product with excellent lubricating durability, and a dental prosthesis using the same.
- the curable dental composition has excellent curability and can be polymerized and cured in a short time.
- the resin layer covering the surface has an appropriate hardness, chemically and mechanically adheres to the base material, improves wear resistance, ), or a dental curable composition and a dental prosthesis that can protect the wear of the prosthesis and the base material itself and maintain the luster for a long period of time.
- normal temperature strictly means 25°C.
- the polymerizable compound (A) included in the present invention preferably contains a urethane (meth)acrylate oligomer (A-1).
- the urethane (meth)acrylate oligomer (A-1) is used to impart hardness and toughness to the cured product of the curable dental composition of the present invention. Further, the urethane (meth)acrylate oligomer (A-1) contributes to curability and toughness of the cured product when combined with the polymerizable monomer (A-2) described later.
- a compound having a polymerizable group e.g., vinyl group, (meth)acryloyloxy group, (meth)acrylamide group, etc.
- a compound that is a polymer in which silicon atoms are bonded to each other via oxygen atoms and at least a portion of the silicon atoms are bonded to an organic group and has a polymerizable group is polysiloxane (C ).
- (meth)acryl means methacryl and acryl
- (meth)acryloyl” means methacryloyl and acryloyl.
- the urethane (meth)acrylate oligomer (A-1) used in the dental curable composition of the present invention is an oligomer having a urethane functional group —NHC(O)O—, and contains polyester, polyether, It may have at least one structure selected from the group consisting of polycarbonate, polyurethane, and polyconjugated diene.
- the viscosity of the urethane (meth)acrylate oligomer (A-1) at 25° C. is preferably 4,000 to 250,000 mPa ⁇ s, more preferably 6,000 to 200,000 mPa ⁇ s. 8000 to 150000 mPa ⁇ s is more preferable.
- the viscosity can be measured, for example, at 25° C. and 20 rpm with a Brookfield viscometer.
- the pencil hardness of the cured film of the urethane (meth)acrylate oligomer (A-1) is preferably F or higher, more preferably H or higher, and even more preferably 2H or higher.
- the pencil hardness of the cured film can be measured according to JIS K 5600-5-4:1999, for example.
- urethane (meth)acrylate oligomer (A-1) a commercially available product is used from the viewpoint that preferable curability, viscosity and hardness can be obtained when combined with the polymerizable monomer (A-2) described later. can.
- Examples of the urethane (meth)acrylate oligomer (A-1) are shown below.
- urethane acrylate oligomers "EBECRYL8807”, “EBECRYL8465”, “EBECRYL8800”, “EBECRYL4101", “EBECRYL4201”, “KRM7735”, etc., commercially available from Daicel Allnex; commercially available from Mitsubishi Chemical Corporation , Urethane acrylate oligomer “UV-1700B”, “UV-6300B” (cured film pencil hardness: 2H to 3H), “UV-7550B” (cured film pencil hardness: F), “UV-7600B” (cured film Pencil hardness: 3H), “UV-7605B” (cured film pencil hardness: 3H to 4H), “UV-7630B” (cured film pencil hardness: 3H), “UV-7640B” (cured film pencil hardness : 3H to 4H), “UV-7650B” (cured film pencil hardness: 2H), etc.; commercially available from Sartomer Company, Exton, PA, urethane acrylate oligomer "CN900
- urethane acrylate oligomer “UV-1700B” (viscosity at 25 ° C.: 40000 to 100000 mPa s, pencil hardness of cured film: 4H)
- pentaerythritol triacrylate hexamethylene diisocyanate urethane prepolymer “UA-306H” 25 Viscosity at ° C.: 10,000 to 40,000 mPa s, pencil hardness of cured film: 6H
- pentaerythritol triacrylate toluene diisocyanate urethane prepolymer “UA-306T” (viscosity at 25 ° C.: 10,000 to 40,000 mPa s, pencil hardness of cured film : 5H) is preferred.
- One of these may be used alone, two or more of them may be used in combination, and a polymer of a mixture thereof may be used.
- the content of the urethane (meth)acrylate oligomer (A-1) is preferably 25 to 55% by mass, more preferably 30 to 50% by mass, based on the total amount of the dental curable composition. % by mass is more preferred, and 35 to 45% by mass is even more preferred. In one embodiment, the content of the urethane (meth)acrylate oligomer (A-1) is preferably 15 to 80 parts by mass, more preferably 20 to 75 parts by mass, per 100 parts by mass of the total amount of the polymerizable compound (A). is more preferable, and 25 to 70 parts by mass is even more preferable.
- the polymerizable compound (A) included in the present invention preferably contains a polymerizable monomer (A-2).
- the polymerizable monomer (A-2) is used to enhance curability and adhesion to substrates.
- the polymerizable monomer (A-2) also contributes to the curability of the cured product when combined with the urethane (meth)acrylate oligomer (A-1).
- polymerizable monomer (A-2) known polymerizable monomers used in dental compositions can be used without any limitation.
- Specific examples of such polymerizable monomers (A-2) include ⁇ -cyanoacrylic acid, (meth)acrylic acid, ⁇ -halogenated acrylic acid, crotonic acid, cinnamic acid, sorbic acid, maleic acid and itaconic acid.
- (meth)acrylic acid esters or (meth)acrylamides are preferably used.
- the (meth)acrylate or (meth)acrylamide-based polymerizable monomers include monofunctional (meth)acrylates, monofunctional monomers such as monofunctional (meth)acrylamides, and bifunctional (meth)acrylates. and polyfunctional monomers (preferably polyfunctional (meth)acrylate monomers) such as trifunctional or higher (meth)acrylates. Examples of suitable polymerizable monomers are shown below.
- Monofunctional (meth)acrylate monomer and monofunctional (meth)acrylamide monomer (a-1) isobutyl (meth)acrylate, benzyl (meth)acrylate, lauryl (meth)acrylate, 2-(N,N-dimethylamino)ethyl (meth)acrylate, 2,3-dibromopropyl (meth)acrylate, 2-hydroxyethyl ( meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 10-hydroxydecyl (meth) acrylate, propylene glycol mono (meth) acrylate, glycerin mono (meth) acrylate, erythritol mono (meth) acrylate, N-methylol (meth) Acrylamide, N-hydroxyethyl (meth)acrylamide, N,N-bis(2-hydroxyethyl) (meth)acrylamide, (meth)acryloyloxide decylpyridinium bromide
- Bifunctional (meth)acrylate monomer (a-2) Ethylene glycol di(meth)acrylate, triethylene glycol di(meth)acrylate, propylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, 1,10- Decanediol di(meth)acrylate, bisphenol A diglycidyl acrylate (2,2-bis[4-[3-acryloyloxy-2-hydroxypropoxy]phenyl]propane), bisphenol A diglycidyl methacrylate (2,2-bis[ 4-[2-hydroxy-3-methacryloyloxypropoxy]phenyl]propane, commonly known as “Bis-GMA”), 2,2-bis[4-(meth)acryloyloxyethoxyphenyl]propane, 2,2-bis[4 -acryloyloxypolyethoxyphenyl]propane, 2,2-bis[
- Trifunctional or higher (meth)acrylate monomer (a-3) Trimethylolpropane tri(meth)acrylate, trimethylolethane tri(meth)acrylate, tetramethylolmethane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol hexa(meth)acrylate Acrylates, dipentaerythritol penta(meth)acrylate, ethoxylated (3) trimethylolpropane tri(meth)acrylate, propoxylated (3) trimethylolpropane tri(meth)acrylate, N,N-(2,2,4- trimethylhexamethylene)bis[2-(aminocarboxy)propane-1,3-diol]tetra(meth)acrylate, 2,2,6,6-tetrakis(acryloyloxymethyl)-4-o
- the polymerizable monomer (A-2) is preferably a trifunctional or higher (meth)acrylate monomer (a-3) from the viewpoint of curability. More preferred are pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol hexa(meth)acrylate, dipentaerythritol penta(meth)acrylate, ethoxylated (3) trimethylolpropane tri(meth)acrylate. .
- the polymerizable monomer (A-2) may be blended singly or in combination of two or more.
- polyfunctional (meth)acrylate monomers bifunctional (meth)acrylate monomer (a-2), trifunctional or higher (meth)acrylate monomer (a-3)) are They may be blended, or two or more may be blended in combination.
- the content of the polymerizable monomer (A-2) is preferably 20 to 55% by mass, more preferably 25 to 50% by mass, based on the total amount of the dental curable composition. % is more preferred, and 30 to 45% by mass is even more preferred.
- the content of the polymerizable monomer (A-2) is preferably 15 to 80 parts by mass, more preferably 20 to 75 parts by mass, and 25 to 70 parts by mass in 100 parts by mass of the total amount of the polymerizable compound (A). Parts by mass are more preferred.
- the polymerizable compound (A) contains a polymerizable monomer (A-2), and the polymerizable monomer (A-2) has at least one acidic group per molecule. and an adhesive monomer (a-4) having an acidic group (hereinafter also referred to as "adhesive monomer (a-4) having an acidic group").
- adhesive monomer (a-4) having an acidic group hereinafter also referred to as "adhesive monomer (a-4) having an acidic group”
- a dental adhesive composition (F) (hereinafter referred to as "adhesive composition ( F)”) may be used with the dental hardenable composition of the present invention.
- a preferred embodiment is a dental kit comprising the dental curable composition of the present invention and a dental adhesive composition (F) containing an acidic group-containing adhesive monomer (a-4). is mentioned.
- the dental curable composition of the present invention used in the dental kit may or may not contain the adhesive monomer (a-4) having an acidic group.
- “primer composition (F)” when the dental adhesive composition (F) contains a volatile organic solvent (G) in addition to the adhesive monomer (a-4) having an acidic group.
- the dental adhesive composition (F) used in the dental kit commercially available products (for example, trade name "Clearfill (registered trademark) Ceramic (registered trademark) Primer Plus” (manufactured by Kuraray Noritake Dental Co., Ltd.), etc.) may be used.
- the adhesive composition (F) containing the adhesive monomer (a-4) having an acidic group strengthens the interface between the substrate and the cured product of the composition, which is the resin layer built up on the substrate. Can be glued.
- the adhesive monomer (a-4) having an acidic group is a polymerizable monomer having an acidic group such as a phosphoric acid group, a phosphonic acid group, a pyrophosphate group, a thiophosphoric acid group, a carboxylic acid group or a sulfonic acid group. Specific examples include the following.
- Phosphate group-containing polymerizable monomers include, for example, 2-(meth)acryloyloxyethyl dihydrogenphosphate, 10-(meth)acryloyloxydecyldihydrogenphosphate, 20-(meth)acryloyloxyeicosyldi hydrogen phosphate, 1,3-di(meth)acryloyloxypropyl-2-dihydrogenphosphate, 2-(meth)acryloyloxyethylphenyl phosphate, 2-(meth)acryloyloxyethyl-2'-bromoethylphosphorus acids, (meth)acryloyloxyethylphenyl phosphate, etc., and acid chlorides thereof.
- Phosphonic acid group-containing polymerizable monomers include, for example, 2-(meth)acryloyloxyethylphenylphosphonate, 5-(meth)acryloyloxypentyl-3-phosphonopropionate, 6-(meth)acryloyloxyhexyl -3-phosphonopropionate, 10-(meth)acryloyloxydecyl-3-phosphonopropionate, 6-(meth)acryloyloxyhexylphosphonoacetate, 10-(meth)acryloyloxydecylphosphonoacetate, and acid chlorides thereof.
- Pyrophosphate group-containing polymerizable monomers include, for example, di[2-(meth)acryloyloxyethyl] pyrophosphate, bis[4-(meth)acryloyloxybutyl] pyrophosphate, bis[6-(meth)pyrophosphate ) acryloyloxyhexyl], bis[8-(meth)acryloyloxyoctyl] pyrophosphate, bis[10-(meth)acryloyloxydecyl] pyrophosphate, and acid chlorides thereof.
- polymerizable monomers having a thiophosphoric acid group examples include 2-(meth)acryloyloxyethyl dihydrogendithiophosphate, 10-(meth)acryloyloxydecyldihydrogenthiophosphate, and acid chlorides thereof. is mentioned.
- carboxylic acid group-containing polymerizable monomers examples include (meth)acrylic acid, mono(2-(meth)acryloyloxyethyl) succinate, mono(2-(meth)acryloyloxyethyl) isophthalate, N- (Meth) acryloyl-5-aminosalicylic acid, 4-vinylbenzoic acid, 4-(meth) acryloyloxyethoxycarbonyl phthalic acid, 4-(meth) acryloyloxyethoxycarbonyl phthalic anhydride, 5-(meth) acryloylaminopentyl Carboxylic acid, 11-(meth)acryloyloxy-1,1-undecanedicarboxylic acid and the like, and acid chlorides thereof.
- the sulfonic acid group-containing polymerizable monomer examples include p-styrenesulfonic acid and the like.
- a phosphoric acid group-containing polymerizable monomer or a phosphonic acid group-containing polymerizable monomer is preferable from the viewpoint of excellent interfacial adhesive strength.
- Phosphate, 2-(meth)acryloyloxyethylphenyl phosphate, 2-(meth)acryloyloxyethylphenyl phosphonate are preferred.
- These adhesive monomers (a-4) having an acidic group may be used singly or in combination of two or more.
- the content of the adhesive monomer (a-4) having an acidic group in the adhesive composition (F) is not particularly limited, but the total amount of the adhesive composition (F) is 0.1 to 10% by mass. is preferred, 1 to 5 mass % is more preferred, and 1 to 3 mass % is even more preferred.
- the dental curable composition contains the adhesive monomer (a-4) having an acidic group
- the content of the adhesive monomer (a-4) having an acidic group is the polymerizable compound (A)
- In the total amount of 100 parts by mass 1 to 35 parts by mass is preferable, 2 to 30 parts by mass is more preferable, and 5 to 25 parts by mass is even more preferable.
- polyfunctional thiol (B) having two or more mercapto groups in one molecule included in the present invention (hereinafter also referred to as "polyfunctional thiol (B)") will be described.
- the polyfunctional thiol (B) used in the present invention is a compound having two or more mercapto groups in one molecule, and is combined with a polymerization initiator (D) described later to cure the polymerizable compound (A). It is possible to improve the cross-linking density and obtain a stronger cured product with high impact resistance. Thereby, the cured product has the desired pencil hardness.
- the cured product of the curable dental composition has excellent abrasion resistance due to the excellent impact resistance of the cured product. Furthermore, the cured product of the dental curable composition not only has excellent wear resistance of itself, but also has excellent wear resistance of the opposing teeth. Moreover, since the curability is accelerated, the content of the polymerization initiator (D) can be reduced, and shrinkage during curing can be suppressed. Furthermore, the mercapto group forms a hydrogen bond with the OH group on the surface of the ceramic that serves as the base material, so that the adhesion performance between the resin layer and the base material can be improved, and the sulfur atoms present in the molecule increase the refractive index. be able to.
- a polyfunctional thiol (B) and a polysiloxane (C) (preferably polysilsesquioxane (C-1), more preferably a polysilsesquioxane composition that is liquid at 25° C.) By combining these, more excellent lubrication durability can be obtained.
- the polyfunctional thiol (B) is not particularly limited as long as it is a compound having two or more mercapto groups in one molecule. Specific examples include a compound having two mercapto groups in one molecule, a compound having three mercapto groups in one molecule, a compound having four mercapto groups in one molecule, and a compound having six mercapto groups in one molecule. compounds having one mercapto group. Among these, a polyfunctional thiol having 2 to 4 mercapto groups in one molecule is preferable because it has an excellent effect of improving curability and can shorten the curing time, and the color tone when the substrate is coated.
- a polyfunctional thiol having 3 mercapto groups in one molecule and a polyfunctional thiol having 4 mercapto groups in one molecule are used. more preferred.
- Examples of compounds having two mercapto groups in one molecule include butanediol bis(2-mercaptoacetate), hexanediol bis(2-mercaptoacetate), ethanediol bis(2-mercaptoacetate), 2,2 '-(Ethylenedithio)diethanethiol, ethylene glycol bis (3-mercapto-2-methylpropionate), propylene glycol bis (3-mercapto-2-methylpropionate), diethylene glycol bis (3-mercapto-2 -methyl propionate), butanediol bis(3-mercapto-2-methylpropionate), octanediol bis(3-mercapto-2-methylpropionate), bis(3-mercapto-2-methylpropyl) Compounds having two primary mercapto groups in one molecule such as phthalate; 1,4-bis(3-mercaptobutyryloxy)butane, bis(1-mercaptoethyl)phthalate
- primary mercapto group means a mercapto group bonded to a primary carbon atom
- secondary mercapto group refers to a mercapto group bonded to a secondary carbon atom
- tertiary mercapto group means a mercapto group attached to a tertiary carbon atom
- Examples of compounds having three mercapto groups in one molecule include trimethylolpropane tris (2-mercaptoacetate), trimethylolpropane tris (3-mercaptopropionate), trimethylolpropane tris (3- mercapto-2-methylpropionate), 3-(3-mercapto-propoxy)-2,2-bis-(3-mercapto-propoxymethyl)-propan-1-ol, etc.
- 3 1 per molecule compounds having a mercapto group trimethylolpropane tris (3-mercaptobutyrate), trimethylolpropane tris (2-mercaptopropionate), trimethylolpropane tris (4-mercaptovalerate), 3-mercaptovalerate), 1,3,5-tris(3-mercaptobutyloxyethyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione, etc. and compounds having three tertiary mercapto groups in one molecule such as trimethylolpropane tris(2-mercaptoisobutyrate).
- examples of compounds having four mercapto groups in one molecule include pentaerythritol tetrakis (2-mercaptoacetate), pentaerythritol tetrakis (3-mercaptopropionate), pentaerythritol tetrakis (3-mercaptobutyrate ) compounds having four primary mercapto groups in one molecule such as; Mercapto-2-propionate), pentaerythritol tetrakis (4-mercaptovalerate), compounds having four secondary mercapto groups in one molecule such as pentaerythritol tetrakis (3-mercaptovalerate); pentaerythritol tetrakis ( 2-mercaptoisobutyrate) having four tertiary mercapto groups in one molecule.
- examples of compounds having 6 mercapto groups in one molecule include 6 primary mercapto groups in one molecule such as dipentaerythritol hexakis (3-mercapto-2-methylpropionate) Dipentaerythritol hexakis (3-mercaptobutyrate), dipentaerythritol hexakis (2-mercaptopropionate), dipentaerythritol hexakis (4-mercaptovalerate), dipentaerythritol hexakis ( Compounds having 6 secondary mercapto groups in one molecule such as 3-mercaptovalerate); 6 tertiary mercapto groups in one molecule such as dipentaerythritol hexakis (2-mercaptoisobutyrate) and compounds having
- polyfunctional thiols (B) from the viewpoint of suppressing the unpleasant odor of the curable composition and improving the storage stability, it does not have a primary mercapto group and the number of secondary mercapto groups and a compound in which the total number of tertiary mercapto groups is two or more.
- a compound having two secondary mercapto groups in one molecule a compound having two tertiary mercapto groups in one molecule, a compound having three secondary mercapto groups in one molecule, A compound having three tertiary mercapto groups in one molecule, a compound having four secondary mercapto groups in one molecule, a compound having four tertiary mercapto groups in one molecule, one molecule
- a compound having 6 secondary mercapto groups in the molecule preferably a compound having 6 tertiary mercapto groups in the molecule, and a compound having 2 secondary mercapto groups in the molecule
- 1 molecule Compounds having two tertiary mercapto groups in one molecule
- Compounds having three secondary mercapto groups in one molecule Compounds having three tertiary mercapto groups in one molecule Compounds having three tertiary mercapto groups in one molecule
- polyfunctional thiol (B) examples include pentaerythritol tetrakis (3-mercaptobutyrate), 1,3,5-tris (3-mercaptobutyloxyethyl)-1,3,5-triazine-2,4,6 ( 1H,3H,5H)-trione is particularly preferred.
- One of the polyfunctional thiols (B) may be used alone, or two or more may be used in combination.
- the molecular weight of the polyfunctional thiol (B) is not particularly limited, but from the viewpoint of improving the curability of the curable composition, it is preferably 200 to 1000.
- the polyfunctional thiol (B) can also be easily obtained as a commercial product.
- 1,4-bis (3-mercaptobutyryloxy) butane (trade name manufactured by Showa Denko Co., Ltd.) is readily available as a commercial product.
- Kerens MT registered trademark
- PE1 pentaerythritol tetrakis (3-mercaptobutyrate)
- 1,3,5-tris (3 -mercaptobutyryloxyethyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione
- TPMB trimethylolpropane tris(3-mercaptobutyrate)
- the refractive index of the polyfunctional thiol (B) is preferably 1.40 or higher, more preferably 1.45 or higher, and even more preferably 1.50 or higher, from the viewpoint of glossiness of the cured product.
- the refractive index of the polyfunctional thiol (B) can be measured with an Abbe refractometer.
- the refractive index can be measured by partially modifying JIS K 0062:1992. Specifically, it can be measured by an immersion method at 23° C. using an Abbe refractometer using the D-line of sodium as a light source.
- liquid two or more liquids having a refractive index close to the assumed refractive index of the sample filler (polyfunctional thiol (B)) are combined to prepare a plurality of liquids having different refractive indices.
- a sample is suspended in each liquid in an atmosphere of 23° C., and the liquid that looks most transparent is selected by naked eye observation.
- the refractive index of the liquid is used as the refractive index of the sample, and the refractive index of the liquid is measured with an Abbe refractometer.
- Liquids that can be used are, for example, sulfur-dissolved diiodomethane, 1-bromonaphthalene, methyl salicylate, dimethylformamide, 1-pentanol, and the like.
- the content of the polymerizable compound (A) and the polyfunctional thiol (B) is, from the viewpoint of improving curability, the number of unsaturated groups of the polymerizable compound (A) and the number of mercapto groups of the polyfunctional thiol (B). preferably determined based on That is, the ratio of the number of unsaturated groups possessed by the polymerizable compound (A) to the number of mercapto groups possessed by the polyfunctional thiol (B) ([number of unsaturated groups]/[number of mercapto groups]) was 0. It is preferably in the range of 25-4.
- the content of the polyfunctional thiol (B) is preferably 5 to 40% by mass, more preferably 10 to 35% by mass, based on the total amount of the dental curable composition. %, more preferably 15 to 30% by mass. If the content of the polyfunctional thiol (B) in the curable composition is within the above range, in addition to abrasion resistance, effect of suppressing color tone change of the substrate, durability of lubrication, etc., curing of the curable composition A cured product with less odor before and after curing and with improved curability and adhesion to substrates can be obtained.
- the number of unsaturated groups in the polymerizable compound (A) means the total number (number of moles) of unsaturated groups in all compounds belonging to the polymerizable compound (A).
- the number of mercapto groups in the functional thiol (B) means the total number (number of moles) of mercapto groups in all compounds belonging to the polyfunctional thiol (B).
- Polysiloxane (C) included in the present invention will be described.
- Polysiloxane (C) is not particularly limited as long as it is a polymer in which silicon atoms are bonded to each other through oxygen atoms and at least some of the silicon atoms are bonded to organic groups.
- Polysiloxane (C) improves adhesion to substrates (preferably ceramic substrates).
- Polysiloxane (C) may be used individually by 1 type, and may use 2 or more types together.
- a preferred embodiment includes a dental curable composition in which polysiloxane (C) comprises polysilsesquioxane (C-1). A preferred embodiment is described below using polysilsesquioxane (C-1).
- the polysilsesquioxane (C-1) included in the present invention improves adhesion to substrates (preferably ceramic substrates). Further, the polysilsesquioxane (C-1), when combined with a filler (E) described later, acts with the filler (E) to improve the affinity with the polymerizable compound (A), resulting in a cured product. can improve the strength of
- Polysilsesquioxane (C-1) is not particularly limited as long as it is a linear, branched or network compound having a Si—O bond (siloxane bond).
- Examples of polysiloxane (C) include those composed of units represented by the following general formula (I).
- n 1 in the case of polysilsesquioxane (C-1).
- RnSiO(4- n )/2 (I) (Wherein, R represents an organic group. n represents a number greater than 0 and less than 4.)
- R in general formula (I) examples include an alkyl group, a cycloalkyl group, a haloalkyl group, an alkenyl group, an aryl group, and an arylalkyl group.
- alkyl group examples include alkyl groups having 1 to 10 carbon atoms such as methyl group, ethyl group, propyl group and butyl group.
- the cycloalkyl group includes cycloalkyl groups having 3 to 10 carbon atoms such as cyclopentyl group and cyclohexyl group.
- Haloalkyl groups include halogenated alkyl groups having 1 to 10 carbon atoms such as 3-chloropropyl group and 3,3,3-trifluoropropyl group.
- the alkenyl group includes alkenyl groups having 2 to 10 carbon atoms such as vinyl group, allyl group and butenyl group.
- the aryl group includes aryl groups having 6 to 20 carbon atoms such as phenyl group, tolyl group and naphthyl group.
- Examples of the arylalkyl group include C1-4 alkyl groups having a C6-12 aryl group such as a benzyl group and a phenethyl group.
- the organic group for R is preferably a methyl group, a phenyl group, an alkyl group, an alkenyl group (such as a vinyl group), or a fluoro C1-6 alkyl group.
- polysilsesquioxane (C-1) examples include polydialkylsiloxanes such as polydimethylsiloxane; polyalkylalkenylsiloxanes such as polymethylvinylsiloxane; polyalkylarylsiloxanes such as polymethylphenylsiloxane; polydiarylsiloxane; copolymer composed of polyorganosiloxane units [dimethylsiloxane-methylvinylsiloxane copolymer, dimethylsiloxane-methylphenylsiloxane copolymer, dimethylsiloxane-methyl (3,3,3-trifluoro propyl)siloxane copolymer, dimethylsiloxane-methylvinylsiloxane-methylphenylsiloxane copolymer, etc.] and the like. Polysilsesquioxane (C-1) may be used alone or in combination of two or more.
- polysilsesquioxane (C-1) a composition obtained by heat-treating an organosilicon compound such as a silane coupling agent can be used.
- an organosilicon compound such as a silane coupling agent
- a composition obtained by dissolving a silane coupling agent in a solvent and heating at 70°C for 3 hours to obtain a sol solution, and then distilling off the solvent at 70°C under vacuum conditions, is liquid at 25°C. is preferred.
- the polysilsesquioxane (C-1) obtained by the above method can be used in the form of a composition containing an unreacted organosilicon compound.
- an organic silicon compound having an unsaturated group may be used in the form of a composition containing unreacted substances.
- a polysilsesquioxane polysilsesquioxane composition
- uniform coating becomes easier, and operation when building up a dental curable composition on a substrate Excellent in nature.
- a polysilsesquioxane composition that is liquid at 25° C. in combination with the polyfunctional thiol (B)
- B polyfunctional thiol
- organosilicon compounds to be used include phenyltriethoxysilane, trimethoxy(phenylethyl)silane (1-phenylethyl, 2-phenylethyl mixture), (1E,4E)-1-(4-hydroxy-3,5 -dimethoxyphenyl)-5-(3,4,5-trimethoxyphenyl)-1,4-pentadien-3-one, trimethoxy(4-vinylphenyl)silane, trimethoxy(4-methoxyphenyl)silane, phenyltrimethoxy Organosilicon compounds having a phenyl group such as silane and benzyltriethoxysilane; Having an alkyl group such as methoxysilane, ethyltrimethoxysilane, decyltrimethoxysilane, hexadecyltrimethoxysilane, propyltrimethoxysilane, cyclopenty
- Organosilicon compounds trimethoxy(4-vinylphenyl)silane, vinyltrimethoxysilane, 3-(trimethoxysilyl)propyl acrylate, 3-(triethoxysilyl)propyl methacrylate, allyltriethoxysilane, allyltrimethoxysilane, etc.
- organic silicon compounds having an unsaturated group of The organosilicon compound may be used alone or in combination of two or more to improve the adhesion to the ceramic substrate, and the polymerizable compound ( From the viewpoint of improving affinity with A), an organosilicon compound having a phenyl group, an organosilicon compound having an unsaturated group, and a mixture thereof are preferred, such as phenyltriethoxysilane and 3-(trimethoxysilyl)propyl acrylate. , and mixtures thereof are more preferred.
- the content of polysiloxane (C) improves the adhesion to ceramic substrates, and the polymerizable compound (A ), the total amount of the curable dental composition is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and even more preferably 0.5% by mass or more.
- the content of polysiloxane (C) is preferably 10% by mass or less, more preferably 8% by mass or less, 5% by mass or less is more preferable.
- the range may be a combination of any of these upper and lower limits.
- the content of polysiloxane (C) is, for example, preferably 0.1 to 10% by mass, more preferably 0.2 to 8% by mass, even more preferably 0.5 to 5% by mass.
- the polymerization initiator (D) can be selected from commonly available polymerization initiators, and polymerization initiators used for dental purposes are particularly preferably used. Among them, the photopolymerization initiator (D-1) or the chemical polymerization initiator (D-2) can be used alone or in combination of two or more, and from the viewpoint of surface curability, the photopolymerization initiator (D-1) is preferred.
- Examples of the photopolymerization initiator (D-1) include ⁇ -diketones, ketals, thioxanthones, acylphosphine oxides, and ⁇ -aminoacetophenones.
- ⁇ -diketones include dl-camphorquinone, benzyl, and 2,3-pentanedione.
- Ketals include benzyl dimethyl ketal and benzyl diethyl ketal.
- Thioxanthones include 2-chlorothioxanthone and 2,4-diethylthioxanthone.
- Acylphosphine oxides include 2,4,6-trimethylbenzoyldiphenylphosphine oxide, bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, bis(benzoyl)phenylphosphine oxide, bis(2,6-dimethoxybenzoyl) ) phenylphosphine oxide, tris(2,4-dimethylbenzoyl)phosphine oxide, tris(2-methoxybenzoyl)phosphine oxide, 2,6-dimethoxybenzoyldiphenylphosphine oxide, 2,6-dichlorobenzoyldiphenylphosphine oxide, 2,3 ,5,6-tetramethylbenzoyldiphenylphosphine oxide, benzoyl di(2,6-dimethylphenyl)phosphonate, 2,4,6-trimethylbenzoylethoxyphenylphosphine oxide, water-soluble acyl compounds disclosed in JP-B-
- ⁇ -Aminoacetophenones include 2-benzyl-dimethylamino-1-(4-morpholinophenyl)-1-butanone, 2-benzyl-diethylamino-1-(4-morpholinophenyl)-1-butanone, 2 -benzyl-dimethylamino-1-(4-morpholinophenyl)-1-propanone, 2-benzyl-diethylamino-1-(4-morpholinophenyl)-1-propanone, 2-benzyl-dimethylamino-1-( 4-morpholinophenyl)-1-pentanone, 2-benzyl-diethylamino-1-(4-morpholinophenyl)-1-pentanone.
- the photopolymerization initiator (D-1) one type may be used alone, or two or more types may be used in combination.
- the content of the photopolymerization initiator (D-1) is preferably 0.01 to 15 parts by mass, more preferably 0.05 to 12 parts by mass, with respect to 100 parts by mass of the total amount of the polymerizable compound (A). 0.1 to 10 parts by mass is more preferable.
- the photopolymerization initiator (D-1) may be used alone, and in order to promote photocurability, a polymerization accelerator such as a tertiary amine, an aldehyde, a compound having a thiol group, etc. They may be used together.
- a polymerization accelerator such as a tertiary amine, an aldehyde, a compound having a thiol group, etc. They may be used together.
- Tertiary amines include 2-(dimethylamino)ethyl (meth)acrylate, N,N-bis[(meth)acryloyloxyethyl]-N-methylamine, N-methyldiethanolamine di(meth)acrylate, N - ethyldiethanolamine di(meth)acrylate, triethanolamine mono(meth)acrylate, triethanolamine di(meth)acrylate, triethanolamine tri(meth)acrylate, triethanolamine, trimethylamine, triethylamine, tributylamine, N-methyl Aliphatic tertiary amines such as diethanolamine, N-ethyldiethanolamine, Nn-butyldiethanolamine; 4-(N,N-dimethylamino)ethyl benzoate, 4-(N,N-dimethylamino)butyl benzoate, Fragrances such as 4-(N,N-dimethylamino)butoxyethyl benzoate
- Aldehydes include dimethylaminobenzaldehyde and terephthalaldehyde.
- Compounds having a thiol group include compounds having one mercapto group in one molecule, such as 2-mercaptobenzoxazole, decanethiol, 3-mercaptopropyltrimethoxysilane, and thiobenzoic acid.
- the polymerization accelerator may be used singly or in combination of two or more as necessary.
- the content of the polymerization accelerator is preferably 0.01 to 15 parts by mass, more preferably 0.05 to 12 parts by mass, and 0.1 to 10 parts by mass with respect to 100 parts by mass of the total amount of the polymerizable compound (A). Part is more preferred.
- a redox polymerization initiator consisting of an oxidizing agent and a reducing agent is preferable.
- a redox polymerization initiator it is necessary to divide the packaging form of the polymerizable compound (A) into two or more so that the oxidizing agent and the reducing agent are separated from each other.
- oxidizing agents for redox polymerization initiators include organic peroxides such as diacyl peroxides, peroxyesters, dialkyl peroxides, peroxyketals, ketone peroxides, and hydroperoxides.
- diacyl peroxides include benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, m-toluoyl peroxide and the like.
- peroxyesters include t-butylperoxybenzoate, bis-t-butylperoxyisophthalate, 2,5-dimethyl-2,5-bis(benzoylperoxy)hexane, t-butylperoxy-2-ethylhexa Noate, t-butylperoxyisopropyl carbonate.
- dialkyl peroxides include dicumyl peroxide, di-t-butyl peroxide and lauroyl peroxide.
- peroxyketals include 1,1-bis(t-butylperoxy)-3,3,5-trimethylcyclohexane.
- ketone peroxides include methyl ethyl ketone peroxide, cyclohexanone peroxide, and methyl acetoacetate peroxide.
- hydroperoxides include t-butyl hydroperoxide, cumene hydroperoxide and p-diisopropylbenzene peroxide.
- aromatic tertiary amines aromatic tertiary amines, aliphatic tertiary amines, sulfinic acid and salts thereof are preferred.
- Aromatic tertiary amines include N,N-dimethylaniline, N,N-dimethyl-p-toluidine, N,N-dimethyl-m-toluidine, N,N-diethyl-p-toluidine, N,N- Dimethyl-3,5-dimethylaniline, N,N-dimethyl-3,4-dimethylaniline, N,N-dimethyl-4-ethylaniline, N,N-dimethyl-4-isopropylaniline, N,N-dimethyl- 4-t-butylaniline, N,N-dimethyl-3,5-di-t-butylaniline, N,N-bis(2-hydroxyethyl)-3,5-dimethylaniline, N,N-di(2 -hydroxyethyl)-p-toluidine, N,N-bis(2-hydroxyethyl)-3,4-dimethylaniline, N,N-bis(2-hydroxyethyl
- Aliphatic tertiary amines include trimethylamine, triethylamine, N-methyldiethanolamine, N-ethyldiethanolamine, Nn-butyldiethanolamine, N-lauryldiethanolamine, triethanolamine, 2-(dimethylamino)ethyl methacrylate, N- Methyldiethanolamine dimethacrylate, N-ethyldiethanolamine dimethacrylate, triethanolamine monomethacrylate, triethanolamine dimethacrylate, triethanolamine trimethacrylate.
- Sulfinic acid and salts thereof include benzenesulfinic acid, sodium benzenesulfinate, potassium benzenesulfinate, calcium benzenesulfinate, lithium benzenesulfinate, p-toluenesulfinic acid, sodium p-toluenesulfinate, and p-toluenesulfinic acid.
- the oxidizing agent and reducing agent may be used singly, or two or more of them may be used in combination, if necessary.
- the content of the oxidizing agent and the reducing agent is preferably 0.01 to 15 parts by mass, more preferably 0.05 to 12 parts by mass, with respect to 100 parts by mass of the total amount of the polymerizable compound (A). .1 to 10 parts by mass is more preferable.
- the dental curable composition of the present invention may contain a filler (E) in order to increase mechanical strength and wear resistance, and to adjust applicability, fluidity, etc. during application.
- a filler (E) in order to increase mechanical strength and wear resistance, and to adjust applicability, fluidity, etc. during application.
- An inorganic filler, an organic filler, or an inorganic/organic composite filler can be used as the filler (E).
- inorganic fillers examples include silica - based minerals such as silica , kaolin , clay, mica , and mica ; Ceramics or glasses containing O 3 , SrO 2 , CaO, P 2 O 5 and the like can be mentioned.
- Such glass include lanthanum glass, barium glass, strontium glass, soda glass, lithium borosilicate glass, aluminosilicate glass, barium boroaluminosilicate glass, strontium boroaluminosilicate glass, zinc glass, fluoroaluminosilicate glass, boron Silicate glass, calcium fluoroaluminosilicate glass, strontium fluoroaluminosilicate glass, barium fluoroaluminosilicate glass, strontium calcium fluoroaluminosilicate glass, and bioglass.
- inorganic fillers crystalline quartz, hydroxyapatite, alumina, titania, yttrium oxide, zirconia, calcium phosphate, barium sulfate, aluminum hydroxide, sodium fluoride, potassium fluoride, sodium monofluorophosphate, lithium fluoride, fluoride Also included are calcium, ytterbium fluoride, and yttrium fluoride. Among these, silica, alumina and titania are preferred, and silica is more preferred.
- the average primary particle size of the inorganic filler is preferably 100 nm or less, more preferably 95 nm or less, even more preferably 90 nm or less, and 80 nm. The following are particularly preferred. From the viewpoint of the viscosity of the composition, the average primary particle size is preferably 5 nm or more, more preferably 15 nm or more, even more preferably 20 nm or more, and particularly preferably 25 nm or more. The range may be any combination of these. The average primary particle size is, for example, preferably 5 to 100 nm, preferably 15 to 95 nm, more preferably 20 to 90 nm, even more preferably 25 to 80 nm.
- One embodiment includes a dental curable composition in which the inorganic filler (preferably hydrophobic silica (E-1)) has an average primary particle size of 15 to 100 nm.
- the inorganic filler from the viewpoint of improving affinity with the polymerizable compound (A) and / or polyfunctional thiol (B) and improving antifouling properties, it is preferable to include a hydrophobic inorganic filler, such as hydrophobic silica. More preferably, it contains (E-1).
- the hydrophobic inorganic filler preferably has a degree of methanol hydrophobicity of 15% or more, more preferably 20% or more, and even more preferably 25% or more.
- the inorganic filler is preferably surface-treated with a surface treatment agent from the viewpoint of strengthening interaction with polysiloxane (C) and improving affinity. This suppresses aggregation of the inorganic filler, reduces the viscosity of the composition, and improves the strength and wear resistance of the cured product.
- a silane coupling agent etc. are mentioned as a surface treating agent.
- Silane coupling agents include, but are not limited to, methyltrimethoxysilane, dimethyldimethoxysilane, phenyltrimethoxysilane, diphenyldimethoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, phenyltriethoxysilane, diphenyldiethoxysilane, isobutyltrimethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris(2-methoxyethoxy)silane, 3,3,3-trifluoropropyltrimethoxysilane, methyl-3,3,3-trifluoropropyldimethoxysilane , 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropy
- the shape of the particles is not particularly limited, and it can be used as a powder of irregular or spherical particles.
- a commercial item can be used as an inorganic filler.
- YA050C-SP3 "YA050C”, “YA010C”, “YC100C” etc. are mentioned.
- AEROSIL registered trademark
- R7200 silicon fine particles, average primary particle size: 12 nm, hydrophobic fumed silica, surface treatment using a silane compound containing a methacryloyloxysilyl group
- Aerosil registered trademark
- NAX50 sica fine particles, average primary particle size: 30 nm, methanol hydrophobicity: 28%, surface treatment using hexamethyldisilazane
- QSG-30 sica spherical fine particles, average primary particle size: 30 nm, methanol hydrophobicity degree of polymerization: 67%, surface treatment using methyltrimethoxysilane and hexamethyldisilazane
- MSP-011 siliconca fine particles, average primary particle size: 30 nm, methanol hydrophobicity: 4
- the average primary particle size can be determined by a laser diffraction scattering method or electron microscope observation of particles.
- the laser diffraction scattering method is convenient for measuring the particle size of 0.1 ⁇ m or more
- the electron microscope observation is convenient for measuring the particle size of ultrafine particles of less than 0.1 ⁇ m.
- 0.1 ⁇ m is a value measured by a laser diffraction scattering method.
- a 0.2% sodium hexametaphosphate aqueous solution can be used as a dispersion medium and measured by a laser diffraction particle size distribution analyzer (SALD-2300, manufactured by Shimadzu Corporation) on a volume basis.
- SALD-2300 laser diffraction particle size distribution analyzer
- a scanning electron microscope (SU3800, S-4000, manufactured by Hitachi High-Technologies Corporation, etc.) can be used for electron microscope observation.
- an electron micrograph of particles is taken, and the particle size of the particles (200 or more) observed in the unit field of view of the photograph is measured by image analysis type particle size distribution measurement software (Mac-View (Mountech Co., Ltd.) ) can be obtained by measuring using At this time, the particle diameter is obtained as an arithmetic mean value of the longest length and the shortest length of the particles, and the average primary particle diameter is calculated from the number of particles and their particle diameters.
- organic fillers examples include polymethyl methacrylate, polyethyl methacrylate, copolymers of polymethyl methacrylate and polyethyl methacrylate, polyfunctional methacrylate polymers, ethylene-vinyl acetate copolymers, acrylonitrile-butadiene-styrene copolymers, and polyamides. , polystyrene, polyvinyl chloride, chloroprene rubber, nitrile rubber, styrene-butadiene rubber.
- inorganic/organic composite fillers examples include those in which an inorganic filler is dispersed in an organic filler, and those in which the surface of an inorganic filler is coated with various polymerizable monomers (A-2).
- the filler (E) may be used singly or in combination of two or more, if necessary.
- the content of the filler (E) is preferably 20% by mass or less, more preferably 10% by mass or less, and further preferably 5% by mass or less, based on the total amount of the dental curable composition. preferable.
- it is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and even more preferably 1.0% by mass or more. The range may be any combination of these.
- the content of the filler (E) is, for example, preferably 0.1 to 20% by mass, more preferably 0.5 to 10% by mass, even more preferably 1.0 to 5.0% by mass.
- the curable dental composition used in the present invention may contain solvents such as organic solvents, additives such as colorants (pigments, fluorescent pigments), ultraviolet absorbers, antioxidants, etc., if necessary, to achieve the effects of the present invention. It may be added as appropriate to the extent that it does not damage it.
- the viscosity of the dental curable composition of the present invention is preferably 10 to 1000 mPa ⁇ s, more preferably 20 to 800 mPa ⁇ s, and even more preferably 40 to 600 mPa ⁇ s, from the viewpoint of coating properties on substrates. Within this range, the curable composition can be easily applied to a desired area without dripping.
- the viscosity can be measured, for example, with a Brookfield viscometer under the conditions of normal temperature and 20 rpm.
- the pencil hardness of the cured film (cured product) of the curable dental composition of the present invention is preferably F or higher, more preferably H or higher, and even more preferably 2H or higher, from the viewpoint of abrasion resistance and impact resistance.
- the pencil hardness of the cured film can be measured according to JIS K 5600-5-4:1999, for example.
- another embodiment comprises a polymerizable compound (A), a polysilsesquioxane (C-1), and a polymerization initiator (D), wherein the polysilsesquioxane (C -1) is a liquid at 25°C, a dental curable composition (X).
- a dental curable composition X
- Each component in the dental curable composition (X) is as described above.
- the dental curable composition (X) does not contain the polyfunctional thiol (B), but optional components (e.g., filler (E), polymerization accelerator, additive) include the polymerizable compound (A), Polyfunctional thiol (B) having two or more mercapto groups in one molecule, polysilsesquioxane (C-1), and a polymerization initiator (D), containing similarly to the dental curable composition You can stay.
- the viscosity, pencil hardness, etc. of the dental curable composition (X) are specified in the same manner.
- the dental curable composition of the present invention is preferably used as a coating agent for coating a substrate. Therefore, the base material to be coated according to the present invention will be described.
- the base material can be selected from commonly available dental prosthesis materials, and can be selected from the group consisting of zirconia, alumina, quartz glass, lithium silicate glass, acrylic resins, composite materials containing polymer resins and inorganic fillers. It preferably contains at least one selected material, and more preferably contains zirconia. Zirconia contains zirconia as a main component and includes a zirconia sintered compact after sintering zirconia.
- a zirconia sintered body is mainly sintered zirconia crystal grains. Therefore, in this specification, zirconia before sintering will be described, but unless otherwise stated, if there is no problem, "zirconia” can be read as “zirconia sintered body”. . And vice versa.
- the zirconia sintered body can contain zirconia and a stabilizer capable of suppressing the phase transition of zirconia (hereinafter also simply referred to as "stabilizer"). That is, the base material before sintering can contain zirconia and a stabilizer capable of suppressing the phase transition of zirconia.
- the stabilizer examples include calcium oxide (CaO), magnesium oxide (MgO), yttrium oxide (Y 2 O 3 ), cerium oxide (CeO 2 ), scandium oxide (Sc 2 O 3 ), niobium oxide (Nb 2 O 5 ), lanthanum oxide (La 2 O 3 ), erbium oxide (Er 2 O 3 ), praseodymium oxide (Pr 2 O 3 , Pr 6 O 11 ), samarium oxide (Sm 2 O 3 ), europium oxide (Eu 2 O 3 ), thulium oxide (Tm 2 O 3 ), gallium oxide (Ga 2 O 3 ), indium oxide (In 2 O 3 ) and ytterbium oxide (Yb 2 O 3 ). preferable.
- the stabilizers may be blended singly or in combination of two or more.
- the content of the stabilizer in the zirconia of the present invention can be measured by, for example, inductively coupled plasma (ICP) emission spectrometry, X-ray fluorescence analysis (XRF), or the like.
- ICP inductively coupled plasma
- XRF X-ray fluorescence analysis
- the content of yttria is 3.0 to 7.5 mol% with respect to the total mol of zirconia and the stabilizer from the viewpoint of the strength and translucency of the sintered body.
- 3.5 to 7.0 mol % is more preferable, and 4.0 to 6.5 mol % is even more preferable.
- the content of yttria is 3.0 mol % or more, the translucency of the sintered body can be enhanced, and when it is 7.5 mol % or less, the decrease in strength of the sintered body can be suppressed.
- the content of calcium oxide is preferably 1 mol% or less, more preferably 0.3 mol% or less, based on a total of 100 mol% of zirconia and stabilizer.
- the content of magnesium oxide is preferably 1 mol% or less, more preferably 0.3 mol% or less, based on the total 100 mol% of zirconia and stabilizer.
- the content of cerium oxide is preferably 1 mol% or less, more preferably 0.3 mol% or less, based on a total of 100 mol% of zirconia and stabilizer.
- Zirconia sintered bodies include not only sintered bodies obtained by sintering molded zirconia particles under normal pressure or under no pressure, but also high-temperature pressurization such as HIP (Hot Isostatic Pressing). Sintered bodies densified by processing are also included.
- HIP Hot Isostatic Pressing
- the zirconia sintered body preferably has at least one of partially stabilized zirconia and fully stabilized zirconia as a matrix phase.
- the main crystal phase of zirconia is at least one of tetragonal and cubic.
- Zirconia may contain both tetragonal and cubic crystals.
- the zirconia sintered body does not substantially contain monoclinic crystals.
- Zirconia partially stabilized by adding a stabilizer is called partially stabilized zirconia (PSZ), and completely stabilized zirconia is called fully stabilized zirconia.
- the shape and size (dimensions) of the base material can be appropriately selected according to the application, the patient's oral environment, etc.
- the dental prosthesis of the present invention comprises a base material and a resin layer, wherein the resin layer comprises a polymerizable compound (A), a polyfunctional thiol (B), a polysiloxane (C), and a polymer It includes a polymerized cured product of a curable composition containing an initiator (D). Part or all of the base material is covered with the resin layer.
- the resin layer is obtained by coating the dental curable composition on the base material and polymerizing and curing the composition.
- the dental prosthesis of the present invention may have two or more resin layers with different compositions. Two or more resin layers can be laminated on the substrate.
- the thickness of the resin layer on the substrate is preferably 1 to 500 ⁇ m, more preferably 7 to 100 ⁇ m, and 7 to 80 ⁇ m. is more preferable, and 7 to 50 ⁇ m is most preferable.
- the thickness of the resin layer is preferably the thickness of the thickest portion.
- a base material having a predetermined shape and dimensions is produced.
- a patient's dental prosthesis is made with the base material described above using known methods.
- a dental curable composition is applied to the substrate.
- an adhesive composition (F) separately prepared in advance is applied to the base material, if necessary.
- Application can be performed, for example, using a brush.
- the area of the base material to be coated with the dental curable composition can be appropriately selected according to the patient's oral environment.
- the area to which the dental curable composition is applied is preferably the area exposed in the oral cavity.
- the area to which the dental curable composition is applied may be the area facing the abutment tooth.
- the substrate coated with the dental curable composition is polymerized.
- Polymerization conditions can be, for example, 90 seconds using an irradiator emitting light in the wavelength range of 500 nm.
- the same steps can be repeated.
- the dental prosthesis of the present invention can be obtained by modifying the shape and polishing as necessary.
- an adhesive composition (F) containing an adhesive monomer (a-4) having an acidic group is adhered with an adhesive composition (F) containing an adhesive monomer (a-4) having an acidic group.
- a method of applying a dental curable composition is also preferably used.
- the volatile organic solvent (G) contained in the primer composition (F) preferably have a boiling point of 150° C. or lower, more preferably 100° C. or lower, at normal pressure. When a volatile organic solvent having a boiling point of over 150° C.
- Volatile organic solvents include alcohols such as ethanol, methanol, 1-propanol and isopropyl alcohol; ketones such as acetone, methyl ethyl ketone and diethyl ketone; 1,2-dimethoxyethane, 1,2-diethoxyethane, tetrahydrofuran and the like.
- Ethers carboxylic acid esters such as methyl formate, ethyl formate, methyl acetate, ethyl acetate, propyl acetate, and butyl acetate; methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl ( Examples include (meth)acrylic acid esters such as meth)acrylate. Among them, (meth)acrylic acid esters are preferred because they can be cured simultaneously with the polymerizable monomer, and methyl methacrylate is particularly preferred because of its low toxicity and low boiling point.
- the volatile organic solvent (G) may be used singly or in combination of two or more as necessary.
- the content of the volatile organic solvent (G) is preferably 90 to 99.9% by mass, more preferably 95 to 99% by mass, based on the total amount of the primer composition (F) in terms of coatability and operability. , 97 to 99 mass % is more preferred.
- the dental prosthesis of the present invention can have higher transparency than the base material alone.
- the dental prosthesis of the present invention can have higher glossiness than the base material alone.
- the dental prosthesis of the present invention can have an appearance closer to that of natural teeth than the base alone.
- the present invention includes embodiments in which the above configurations are combined in various ways within the scope of the technical idea of the present invention as long as the effects of the present invention are exhibited.
- UV-1700B urethane acrylate (trade name "UV-1700B” manufactured by Mitsubishi Chemical Corporation)
- UA-306T Pentaerythritol triacrylate toluene diisocyanate urethane prepolymer (trade name “UA-306T” manufactured by Kyoeisha Chemical Co., Ltd.)
- SR454NS ethoxylated (3) trimethylolpropane triacrylate
- SR9003NS propoxylated (2) neopentyl glycol diacrylate
- DPHA dipentaerythritol hexaacrylate
- TMPTA trimethylolpropane trimethacrylate MMA: methyl methacrylate
- D2.6E 2,2-bis[4-methacryloyloxypolyethoxyphenyl]propane (average number of added moles of ethoxy groups: 2.6)
- 3G triethylene glycol dimethacrylate
- MDP 10-methacryloyloxydecyl dihydrogen phosphate
- BAPO bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide
- Lucirin-TPO 2,4,6-trimethylbenzoyldiphenylphosphine oxide
- CQ dl-camphorquinone
- DMBE 4-(N,N-dimethylamino)ethyl benzoate
- DMEM 2-(N,N-dimethylamino)ethyl methacrylate
- Examples 1-13, Comparative Examples 1-3, 6-7 A dental curable composition and a base material of each example and comparative example were prepared as follows, and their properties were evaluated. Table 1 shows the results.
- dental zirconia (trade name “KATANA (registered trademark) Ziroconia STML NW”, thickness 14 mm, Kuraray Noritake Dental Co., Ltd.) was obtained in a hemispherical shape with a diameter of 12 mm or a thickness
- a rectangular parallelepiped shape with a height of 2.4 mm, a length of 36 mm, and a width of 24 mm, or a disc shape with a diameter of 22 mm and a thickness of 1.2 mm was cut using a dental cutting machine DWX-51D (manufactured by Roland DG Co., Ltd.). It was scraped out to produce a molding.
- the molded product is fired at 1550 ° C. for 2 hours, and a hemisphere with a diameter of 10 mm is fired.
- a base material composed of a zirconia sintered body having a rectangular parallelepiped shape of 2 mm in thickness, 30 mm in length and 20 mm in width, or a disc shape of 18 mm in diameter and 1 mm in thickness was produced.
- the substrate is ultrasonically cleaned in acetone, dried, and coated on the substrate. I made preparations to do so.
- Comparative example 4 As materials for coating the base material, we used Ceseed (registered trademark) N Color Coat Clear (Kuraray Noritake Dental Co., Ltd.), a commercially available product containing monomers (polyfunctional acrylate, methyl methacrylate), surface-treated silica-based microfillers, and photopolymerization catalysts. company) was used.
- Comparative example 5 As a material for coating the substrate, Cerabian (registered trademark) ZR FC Paste Stain Clear Glaze (manufactured by Kuraray Noritake Dental Co., Ltd.), a commercially available product containing potash-aluminosilicate glass, inorganic pigments, glycerin, and 1,3-butanediol )It was used.
- bovine tooth enamel was polished with #1000 to cut out a flat surface.
- the test piece and bovine tooth enamel from which the flat surface was shaved were set in an abrasion tester (manufactured by Navic), and the hemispherical shape was measured against the fixed bovine tooth enamel under water at room temperature.
- the sample was rotated by 35° from the contact state (initial state) while applying a load so as to push the sample while maintaining the contact.
- the load at this time was 7.8 kgf, and the operating time was 1 second. Then, after 1 second, the load was released while being rotated by 35° to return to the initial state. This cycle was repeated 100,000 times.
- the width and depth of the wear marks were measured with the flat surface portion of the bovine tooth enamel not in contact with the sample as the reference (wear depth 0 ⁇ m). (manufactured by Keyence) and measured as the wear amount (wear volume, wear diameter, wear depth) of bovine tooth enamel. This was used as an indicator of the wear resistance of the opposing tooth for the dental mill blank.
- the wear volume, the wear diameter, and the wear depth were each measured three times per sample, and the average value of two samples was taken as the average value.
- the wear volume is preferably 0.15 mm 3 or less, more preferably 0.12 mm 3 or less, even more preferably 0.10 mm 3 or less, and particularly preferably 0.08 mm 3 or less.
- the wear volume may be, for example, 0.02 mm 3 or more.
- the wear diameter is preferably 2.1 mm or less, more preferably 2.0 mm or less, even more preferably 1.9 mm or less, particularly preferably 1.8 mm or less, and 1.7 mm.
- the wear depth is preferably 70 ⁇ m or less, more preferably 65 ⁇ m or less, even more preferably 60 ⁇ m or less, and particularly preferably 55 ⁇ m or less.
- the wear depth may be, for example, 10 ⁇ m or more.
- the abrasion volume was measured with a digital microscope (manufactured by KEYENCE CORPORATION, trade name "VHX-S50").
- the wear amount of the polymerized and cured product was measured as an average value similar to the wear amount of the bovine tooth enamel.
- the wear volume of the coating layer is preferably 0.075 mm 3 or less, more preferably 0.07 mm 3 or less, even more preferably 0.065 mm 3 or less, and 0.06 mm 3 or less. is particularly preferred.
- the wear volume may be, for example, 0.02 mm 3 or more.
- the glossiness is preferably 70% or more, more preferably 75% or more, and 80% or more from the viewpoint of luster durability that can maintain gloss equivalent to that of natural teeth for a long period of time. is more preferable, and 85% or more is particularly preferable.
- the arithmetic mean roughness Ra is preferably 3.8 ⁇ m or less, more preferably 3.3 ⁇ m or less, even more preferably 2.8 ⁇ m or less, and particularly preferably 2.3 ⁇ m or less.
- Arithmetic mean roughness Ra may be, for example, 1.0 ⁇ m or more.
- "surface roughness after abrasion ( ⁇ m)” represents arithmetic mean roughness Ra ( ⁇ m).
- the prepared composition was applied and cured under the conditions shown in Table 1 to obtain a test piece.
- the chromaticity of the test piece was measured in the same manner as the measurement of the chromaticity of the zirconia substrate described above, and these were defined as L * 1, a * 1, and b * 1.
- ⁇ E * ⁇ (L * 1-L * 0) 2+ (a * 1-a * 0)2+(b * 1 -b * 0) 2 ⁇ 1/2
- the color difference ⁇ E * is preferably as small as possible, preferably 1.6 or less, more preferably 1.4 or less, further preferably 1.2 or less, and most preferably 1.0 or less. preferable.
- Examples 1 to 13 were superior to Comparative Examples 1, 2, and 7 in the lubricating durability of the dental curable composition and in the effect of suppressing color change. .
- all samples of Examples 1 to 13 were excellent in operability, and compared to Comparative Example 3, operability and lubricating durability were excellent.
- Examples 1 to 13 were superior to the commercial product of Comparative Example 4 in operability, lubricity durability, and effect of suppressing color tone change.
- the polymerized and cured product of the dental curable composition had good abrasion resistance such as a small abrasion volume even in the oral environment. It was found to have sex.
- Examples 1 to 13 were superior to Comparative Example 6 containing a monofunctional thiol in lubricating durability of the curable dental composition and effect of suppressing color tone change. Further, in Examples 1 to 13, the cured products were excellent in wear resistance, and compared with Comparative Examples 5 to 7, the wear resistance of the opposing teeth was also excellent.
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Abstract
Description
[1]重合性化合物(A)、1分子中に2個以上のメルカプト基を有する多官能チオール(B)、ポリシロキサン(C)、及び重合開始剤(D)を含む、歯科用硬化性組成物。
[2]前記ポリシロキサン(C)が、ポリシルセスキオキサン(C-1)を含む、[1]に記載の歯科用硬化性組成物。
[3]前記重合性化合物(A)がウレタン(メタ)アクリレートオリゴマー(A-1)、及び/又は重合性単量体(A-2)を含む、[1]又は[2]に記載の歯科用硬化性組成物。
[4]前記多官能チオール(B)が、1分子中に2~4個のメルカプト基を有する多官能チオールを含む、[1]~[3]のいずれかに記載の歯科用硬化性組成物。
[5]前記多官能チオール(B)におけるメルカプト基が、第2級炭素原子、又は第3級炭素原子に結合している、[1]~[4]のいずれかに記載の歯科用硬化性組成物。
[6]前記ポリシロキサン(C)が25℃で液体である、[1]~[5]のいずれかに記載の歯科用硬化性組成物。
[7]前記重合開始剤(D)が光重合開始剤(D-1)を含む、[1]~[6]のいずれかに記載の歯科用硬化性組成物。
[8]フィラー(E)をさらに含む、[1]~[7]のいずれかに記載の歯科用硬化性組成物。
[9]前記フィラー(E)が疎水性シリカ(E-1)を含む、[8]に記載の歯科用硬化性組成物。
[10]前記疎水性シリカ(E-1)の平均一次粒子径が5~100nmである、[9]に記載の歯科用硬化性組成物。
[11]前記歯科用硬化性組成物が基材を被覆するための被覆剤である、[1]~[10]のいずれかに記載の歯科用硬化性組成物。
[12]前記基材が、ジルコニア、アルミナ、石英ガラス、リチウムシリケートガラス、アクリル樹脂、及びポリマー樹脂と無機充填材を含む複合材料からなる群より選択される少なくとも1種を含む、[11]に記載の歯科用硬化性組成物。
[13]前記ジルコニアが、ジルコニアと、ジルコニアの相転移を抑制可能な安定化剤とを含む、[12]に記載の歯科用硬化性組成物。
[14]基材と樹脂層を含む歯科用補綴物であって、
前記樹脂層が、重合性化合物(A)、1分子中に2個以上のメルカプト基を有する多官能チオール(B)、ポリシロキサン(C)、及び重合開始剤(D)を含む歯科用硬化性組成物の重合硬化物を含む、歯科用補綴物。
[15]前記基材が、ジルコニア、アルミナ、石英ガラス、リチウムシリケートガラス、アクリル樹脂、及びポリマー樹脂と無機充填材を含む複合材料からなる群より選択される少なくとも1種を含む、[14]に記載の歯科用補綴物。
[16]前記ジルコニアが、ジルコニアと、ジルコニアの相転移を抑制可能な安定化剤とを含む、[15]に記載の歯科用補綴物。
[17]前記樹脂層の厚さが、1μm~500μmである、[14]~[16]のいずれかに記載の歯科用補綴物。
[18]前記ポリシロキサン(C)が、ポリシルセスキオキサン(C-1)を含む、[14]~[17]のいずれかに記載の歯科用補綴物。
[19]前記重合性化合物(A)がウレタン(メタ)アクリレートオリゴマー(A-1)、及び/又は重合性単量体(A-2)を含む、[14]~[18]のいずれかに記載の歯科用補綴物。
[20]前記多官能チオール(B)が、1分子中にメルカプト基を2~4個を有する多官能チオールを含む、[14]~[19]のいずれかに記載の歯科用補綴物。
[21]前記多官能チオール(B)におけるメルカプト基が、第2級炭素原子、又は第3級炭素原子に結合している、[14]~[20]のいずれかに記載の歯科用補綴物。
[22]前記ポリシロキサン(C)が25℃で液体である、[14]~[21]のいずれかに記載の歯科用補綴物。
[23]前記重合開始剤(D)が光重合開始剤(D-1)を含む、[14]~[22]のいずれかに記載の歯科用補綴物。
[24]前記樹脂層がフィラー(E)をさらに含む、[14]~[23]のいずれかに記載の歯科用補綴物。
[25]前記フィラー(E)が疎水性シリカ(E-1)を含む、[24]に記載の歯科用補綴物。
[26]前記疎水性シリカ(E-1)の平均一次粒子径が5~100nmである、[25]に記載の歯科用補綴物。
また、本発明によれば、歯科用硬化性組成物の硬化性に優れ、歯科用硬化性組成物を短時間で重合硬化させることができる。
さらに、本発明によれば、表面を被覆した樹脂層が適度な硬度を有し、基材と化学的、機械的に接着し、耐摩耗性が向上し、対合する天然歯(対合歯)、又は補綴物、基材自身の摩耗を保護し、長期的な光沢を維持することが可能な歯科用硬化性組成物並びに歯科用補綴物を提供することができる。
まず、本発明に含まれる重合性化合物(A)について説明する。本発明に含まれる重合性化合物(A)は、ウレタン(メタ)アクリレートオリゴマー(A-1)を含むことが好ましい。前記ウレタン(メタ)アクリレートオリゴマー(A-1)は、本発明の歯科用硬化性組成物の硬化物に、硬度、靭性を付与するために用いられる。また、ウレタン(メタ)アクリレートオリゴマー(A-1)は後述の重合性単量体(A-2)と組み合わされた場合に、硬化物の硬化性、靭性にも寄与する。
また、本明細書において、重合性基(例えば、ビニル基、(メタ)アクリロイルオキシ基、(メタ)アクリルアミド基など)を有し、かつ1分子中に2個以上のメルカプト基を有する化合物は、多官能チオール(B)に含むものとする。
さらに、本明細書において、ケイ素原子が酸素原子を介して互いに結合し、少なくとも一部のケイ素原子が有機基と結合しているポリマーであり、かつ重合性基を有する化合物は、ポリシロキサン(C)に含むものとする。
なお、本明細書において、「(メタ)アクリル」とは、メタクリル及びアクリルを意味し、「(メタ)アクリロイル」とは、メタクリロイル及びアクリロイルを意味する。
硬化膜の鉛筆硬度は、例えば、JIS K 5600-5-4:1999により測定することができる。
また、ある実施形態においては、ウレタン(メタ)アクリレートオリゴマー(A-1)の含有量は、重合性化合物(A)の全量100質量部において、15~80質量部が好ましく、20~75質量部がより好ましく、25~70質量部がさらに好ましい。
前記(メタ)アクリル酸エステル又は(メタ)アクリルアミド系の重合性単量体としては、単官能(メタ)アクリレート、単官能(メタ)アクリルアミド等の単官能性単量体、二官能(メタ)アクリレート、三官能以上の(メタ)アクリレート等の多官能性単量体(好適には、多官能(メタ)アクリレート単量体)が挙げられる。好適な重合性単量体の例を以下に示す。
イソブチル(メタ)アクリレート、ベンジル(メタ)アクリレート、ラウリル(メタ)アクリレート、2-(N,N-ジメチルアミノ)エチル(メタ)アクリレート、2,3-ジブロモプロピル(メタ)アクリレート、2-ヒドロキシエチル(メタ)アクリレート、6-ヒドロキシヘキシル(メタ)アクリレート、10-ヒドロキシデシル(メタ)アクリレート、プロピレングリコールモノ(メタ)アクリレート、グリセリンモノ(メタ)アクリレート、エリトリトールモノ(メタ)アクリレート、N-メチロール(メタ)アクリルアミド、N-ヒドロキシエチル(メタ)アクリルアミド、N,N-ビス(2-ヒドロキシエチル)(メタ)アクリルアミド、(メタ)アクリロイルオキシドデシルピリジニウムブロマイド、(メタ)アクリロイルオキシドデシルピリジニウムクロライド、(メタ)アクリロイルオキシヘキサデシルピリジニウムクロライド、(メタ)アクリロイルオキシデシルアンモニウムクロライド等が挙げられる。
エチレングリコールジ(メタ)アクリレート、トリエチレングリコールジ(メタ)アクリレート、プロピレングリコールジ(メタ)アクリレート、ネオペンチルグリコールジ(メタ)アクリレート、1,6-ヘキサンジオールジ(メタ)アクリレート、1,10-デカンジオールジ(メタ)アクリレート、ビスフェノールAジグリシジルアクリレート(2,2-ビス[4-〔3-アクリロイルオキシ-2-ヒドロキシプロポキシ〕フェニル]プロパン)、ビスフェノールAジグリシジルメタクリレート(2,2-ビス[4-〔2-ヒドロキシ-3-メタクリロイルオキシプロポキシ〕フェニル]プロパン、通称「Bis-GMA」)、2,2-ビス〔4-(メタ)アクリロイルオキシエトキシフェニル〕プロパン、2,2-ビス〔4-アクリロイルオキシポリエトキシフェニル〕プロパン、2,2-ビス〔4-メタクリロイルオキシポリエトキシフェニル〕プロパン(エトキシ基の平均付加モル数:2.6)、1,2-ビス〔3-(メタ)アクリロイルオキシ-2-ヒドロキシプロポキシ〕エタン、ペンタエリトリトールジ(メタ)アクリレート、[2,2,4-トリメチルヘキサメチレンビス(2-カルバモイルオキシエチル)]ジ(メタ)アクリレート、プロポキシ化(2)ネオペンチルグリコールジ(メタ)アクリレート等が挙げられる。
トリメチロールプロパントリ(メタ)アクリレート、トリメチロールエタントリ(メタ)アクリレート、テトラメチロールメタントリ(メタ)アクリレート、ペンタエリスリトールトリ(メタ)アクリレート、ペンタエリスリトールテトラ(メタ)アクリレート、ジペンタエリスリトールヘキサ(メタ)アクリレート、ジペンタエリスリトールペンタ(メタ)アクリレート、エトキシ化(3)トリメチロールプロパントリ(メタ)アクリレート、プロポキシ化(3)トリメチロールプロパントリ(メタ)アクリレート、N,N-(2,2,4-トリメチルヘキサメチレン)ビス〔2-(アミノカルボキシ)プロパン-1,3-ジオール〕テトラ(メタ)アクリレート、2,2,6,6-テトラキス(アクリロイルオキシメチル)-4-オキサヘプタン-1,7-ジオール1-(メタ)アクリラート等が挙げられる。
また、重合性単量体(A-2)の含有量は、重合性化合物(A)の全量100質量部において、15~80質量部が好ましく、20~75質量部がより好ましく、25~70質量部がさらに好ましい。
チオリン酸基を有する重合性単量体としては、例えば、2-(メタ)アクリロイルオキシエチルジハイドロジェンジチオホスフェート、10-(メタ)アクリロイルオキシデシルジハイドロジェンチオホスフェート等、及びこれらの酸塩化物が挙げられる。
スルホン酸基含有重合性単量体としては、p-スチレンスルホン酸等が挙げられる。
次に、本発明に含まれる1分子中に2個以上のメルカプト基を有する多官能チオール(B)(以下、「多官能チオール(B)」ともいう。)について説明する。
本発明で用いられる多官能チオール(B)は、1分子中に2個以上のメルカプト基を有する化合物であり、後述する重合開始剤(D)と組み合わせることにより、重合性化合物(A)の硬化性を促進し、架橋密度を向上させ、より強固な耐衝撃性の高い硬化物を得ることができる。これによって、硬化物は所望の鉛筆硬度を有する。また、硬化物が耐衝撃性に優れることにも起因して、歯科用硬化性組成物の硬化物は耐摩耗性に優れる。さらに、歯科用硬化性組成物の硬化物は、それ自身の耐摩耗性に優れるのみならず、対合歯の耐摩耗性にも優れる。また、硬化性を促進するため、重合開始剤(D)の含有量を低下させることができ、硬化時の収縮を抑制することができる。さらに、メルカプト基が基材となるセラミックス表面のOH基と水素結合することで、樹脂層と基材との接着性能を向上させることができ、分子中に存在するイオウ原子によって屈折率を高くすることができる。そのため、歯科用硬化性組成物で基材を被覆した際の色調変化をより抑制できる。
また、多官能チオール(B)と、ポリシロキサン(C)(好適には、ポリシルセスキオキサン(C-1)、より好適には25℃で液体であるポリシルセスキオキサン組成物)とを組み合わせることによって、より優れた滑沢耐久性が得られる。
次に、本発明に含まれるポリシロキサン(C)について説明する。ポリシロキサン(C)は、ケイ素原子が酸素原子を介して互いに結合し、少なくとも一部のケイ素原子が有機基と結合しているポリマーであれば、特に限定されない。ポリシロキサン(C)は、基材(好適には、セラミック基材)に対する接着性を向上させる。ポリシロキサン(C)は、1種を単独で用いてもよく、2種以上を併用してもよい。
ある好適な実施形態としては、ポリシロキサン(C)が、ポリシルセスキオキサン(C-1)を含む、歯科用硬化性組成物が挙げられる。
以下、好適な実施形態として、ポリシルセスキオキサン(C-1)を用いて説明する。
本発明に含まれるポリシルセスキオキサン(C-1)は、基材(好適には、セラミック基材)に対する接着性を向上させる。また、ポリシルセスキオキサン(C-1)は、後述するフィラー(E)と組み合わせた場合、フィラー(E)と作用し、重合性化合物(A)との親和性を向上させて、硬化物の強度を向上させることができる。
RnSiO(4-n)/2 (I)
(式中、Rは有機基を表す。nは、0超4未満の数を表す。)
アルキル基としては、メチル基、エチル基、プロピル基、ブチル基等の炭素数1~10のアルキル基等が挙げられる。
シクロアルキル基としては、シクロペンチル基、シクロヘキシル基等の炭素数3~10のシクロアルキル基等が挙げられる。
ハロアルキル基としては、3-クロロプロピル基、3,3,3-トリフルオロプロピル基等の炭素数1~10のハロゲン化アルキル基等が挙げられる。
アルケニル基としては、ビニル基、アリル基、ブテニル基等の炭素数2~10のアルケニル基等が挙げられる。
アリール基としては、フェニル基、トリル基、ナフチル基等の炭素数6~20のアリール基等が挙げられる。
アリールアルキル基としては、ベンジル基、フェネチル基等の炭素数6~12アリール基を有する炭素数1~4アルキル基等が挙げられる。
Rの有機基としては、メチル基、フェニル基、アルキル基、アルケニル基(ビニル基等)、フルオロC1~6アルキル基が好ましい。
次に、本発明に含まれる重合開始剤(D)について説明する。重合開始剤(D)としては、一般的に使用可能な重合開始剤から選択して使用でき、特に歯科用途に用いられている重合開始剤が好ましく用いられる。なかでも、光重合開始剤(D-1)又は化学重合開始剤(D-2)を、1種単独で又は2種以上を適宜組み合わせて使用でき、表面硬化性の観点から、光重合開始剤(D-1)が好ましい。
本発明の歯科用硬化性組成物は、機械的強度と耐摩耗性を上げるために、また、塗布時の塗布性、流動性等を調整するために、フィラー(E)を含んでいてもよい。フィラー(E)としては、無機フィラー、有機フィラー又は無機/有機複合フィラーを用いることができる。
ある実施形態としては、無機フィラー(好適には、疎水性シリカ(E-1))の平均一次粒子径が、15~100nmである、歯科用硬化性組成物が挙げられる。
疎水性無機フィラーとしては、メタノール疎水化度が15%以上であることが好ましく、20%以上であることがより好ましく、25%以上であることがさらに好ましい。
メタノール疎水化度(%)=[滴定量/(滴定量+50)]×100
硬化膜の鉛筆硬度は、例えば、JIS K 5600-5-4:1999により測定することができる。
また、歯科用硬化性組成物(X)の粘度、鉛筆硬度等の特定も同様である。
歯科用硬化性組成物(X)において、25℃で液体であるポリシルセスキオキサン(ポリシルセスキオキサン組成物)を用いることで、均一な塗工がより容易になり、基材に歯科用硬化性組成物を築盛する際の操作性に優れる。
本発明の歯科用硬化性組成物は基材を被覆するための被覆剤の用途で使用されることが好ましい。そこで、本発明の被覆する基材について説明する。基材は一般的に使用可能な歯科用補綴物の材料から選択して使用でき、ジルコニア、アルミナ、石英ガラス、リチウムシリケートガラス、アクリル樹脂、ポリマー樹脂と無機充填材を含む複合材料からなる群より選択される少なくとも1種を含むことが好ましく、ジルコニアを含むことがより好ましい。ジルコニアは、ジルコニアを主成分として含み、ジルコニアを焼結した後のジルコニア焼結体を含む。
本発明のジルコニア中の安定化剤の含有率は、例えば、誘導結合プラズマ(ICP;Inductively Coupled Plasma)発光分光分析、蛍光X線分析(XRF)等によって測定することができる。
UV-1700B:ウレタンアクリレート(三菱ケミカル株式会社製の商品名「UV-1700B」)
UA-306T:ペンタエリスリトールトリアクリレートトルエンジイソシアネートウレタンプレポリマー(共栄社化学株式会社製の商品名「UA-306T」)
SR454NS:エトキシ化(3)トリメチロールプロパントリアクリレート(Sartomer Company,Exton,PA社製の「SR454NS」)
SR9003NS:プロポキシ化(2)ネオペンチルグリコールジアクリレート(Sartomer Company,Exton,PA社製の「SR9003NS」)
DPHA:ジペンタエリスリトールヘキサアクリレート(Sartomer Company,Exton,PA社製の「DPHA」)
TMPTA:トリメチロールプロパントリメタクリレート
MMA:メチルメタクリレート
D2.6E:2,2-ビス〔4-メタクリロイルオキシポリエトキシフェニル〕プロパン(エトキシ基の平均付加モル数:2.6)
3G:トリエチレングリコールジメタクリレート
MDP:10-メタクリロイルオキシデシルジハイドロジェンホスフェート
MT-PE-1:ペンタエリスリトールテトラキス(3-メルカプトブチレート)(昭和電工株式会社製の商品名「カレンズMT(登録商標) PE1」)
3-MPO:3-(3-メルカプト-プロポキシ)-2,2-ビス-(3-メルカプト-プロポキシメチル)-プロパン-1-オール
[単官能チオール]
3-MPE:3-メルカプトプロピオン酸エチル
フェニルトリエトキシシラン5.9g(24.5mmol)、アクリル酸3-(トリメトキシシリル)プロピル51.1g(218.1mmol)、水23.4g(1.3mol)、エタノール9.2g(0.2mol)、及び酢酸0.3g(4.2mmol)を混合し、この混合物を70℃で3時間加熱して、ポリシルセスキオキサン組成物のゾル溶液を得た。次いで、真空条件下、70℃で10分間加熱して溶媒を留去し、25℃で液体のポリシルセスキオキサン(C-1)を得た。
KMP-702:信越化学工業株式会社製のポリシルセスキオキサン粒子
BAPO:ビス(2,4,6-トリメチルベンゾイル)フェニルホスフィンオキシド
Lucirin-TPO:2,4,6-トリメチルベンゾイルジフェニルホスフィンオキシド
CQ:dl-カンファーキノン
QSG-30:信越化学工業株式会社製のシリカ球状微粒子(平均一次粒子径:30nm、メタノール疎水化度:67%、メチルトリメトキシシラン、及びヘキサメチルジシラザンを用いた表面処理)
R7200:EVONIK INDUSTRIES社製の商品名「AEROSIL(登録商標) R7200」(平均一次粒子径:12nm、疎水性ヒュームドシリカ、メタクリロイルオキシシリル基含有シラン化合物を用いた表面処理)
Ba-1:バリウムガラス(ショット社製、GM27884 NF180、平均一次粒子径0.18μm)100質量部に対して、7質量部のγ-メタクリロイルオキシプロピルトリメトキシシランで表面処理したフィラー
Ba-2:バリウムガラス(ショット社製、GM27884 UF0.4、平均一次粒子径:0.4μm)100質量部に対して、8質量部のγ-メタクリロイルオキシプロピルトリメトキシシランで表面処理したフィラー
DMBE:4-(N,N-ジメチルアミノ)安息香酸エチル
DMEM:2-(N,N-ジメチルアミノ)エチルメタクリレート
各実施例、比較例の歯科用硬化性組成物及び基材を以下のように調製し、その特性を評価した。結果を表1に示す。
表1に記載の各成分を、表1に記載の質量比にて、常温で遊星混練機(クラボウ社製マゼルスター)を用いて混合し、各組成物を調製した。
本発明の歯科用補綴物に相当する試料として歯科用ジルコニア(商品名「KATANA(登録商標)Ziroconia STML NW」、厚み14mm、クラレノリタケデンタル株式会社)より、直径12mmの半球上の形状、又は厚さ2.4mm、縦36mm、横24mmの直方体の形状、又は直径22mm、厚さ1.2mmの円盤上の形状を歯科用切削加工機DWX-51D(ローランド ディー.ジー.株式会社製)を用いて削り出し、成形物を作製した。
基材を被覆する材料として、モノマー(多官能アクリレート、メタクリル酸メチル)、表面処理シリカ系マイクロフィラー、光重合触媒が含まれる市販製品であるセシード(登録商標)N カラーコート クリア(クラレノリタケデンタル株式会社製)を使用した。
基材を被覆する材料として、カリ・アルミノシリケートガラス、無機顔料、グリセリン、1,3-ブタンジオールが含まれる市販製品であるセラビアン(登録商標)ZR FCペーストステイン クリアグレーズ(クラレノリタケデンタル株式会社製)を使用した。
前記調製した組成物を、25℃で、20rpmの条件下にてB型粘度計(ブルックフィールド粘度計)を用いて測定し、平均値を算出した(n=3)。
前記調製した組成物の硬化物を、JIS K 5600-5-4:1999に基づいて測定した(n=1)。
前記調製した組成物の操作性について、前記調製したジルコニア基材上に前記組成物を塗布した際、以下の基準にて評価した(n=5)。
○:一度の塗布で、均一な薄膜が形成できる
△:一度の塗布で、スレ、擦れが発生するが、複数回の塗布で均一な被膜の形成ができる
×:複数回の塗布でも均一な被膜面が形成できない
前記調製した、半球状のジルコニア基材上に、「クリアフィル(登録商標)セラミック(登録商標)プライマープラス」(クラレノリタケデンタル株式会社製)を塗布してエアブローにて乾燥させた後、前記調製した組成物を塗布し、表1に記載の硬化条件(比較例5のみ加熱重合)にて硬化させ、試験片を得た。なお、光照射には、アルファライト(登録商標)III(株式会社モリタ製)を用いた。
また、別途用意した牛歯のエナメル質を#1000で研磨し、平坦面を削り出した。
前記試験片と、平坦面を削り出した牛歯のエナメル質とを摩耗試験機(ナビック社製)にセットし、室温水中下で、固定された牛歯のエナメル質に対して、上記半球状のサンプルを接触させた状態(初期状態)から、接触を維持したまま、サンプルを押し込むように荷重を加えながら35°回転させた。この際の荷重は7.8kgfとし、動作時間は1秒間とした。次いで、1秒後に35°回転させながら荷重を解放し、初期状態に戻した。このサイクルを10万回繰り返した。
その後、サンプルが接触していない牛歯エナメル質の平坦面部分を基準(摩耗深さ0μm)として、摩耗痕の幅及び深さを表面粗さ計「レーザフォーカス変位計 LT-8100」(株式会社キーエンス製)で牛歯エナメル質の摩耗量(摩耗体積、摩耗直径、摩耗深さ)として測定した。これを当該歯科用ミルブランクについての対合歯の耐摩耗性の指標とした。牛歯エナメル質の摩耗量に関して、摩耗体積、摩耗直径、摩耗深さのそれぞれについて、1サンプルにつき3回測定し、2サンプルを測定した平均値とした。
摩耗体積は、0.15mm3以下であることが好ましく、0.12mm3以下であることがより好ましく、0.10mm3以下であることがさらに好ましく、0.08mm3以下であることが特に好ましく、0.06mm3以下であることが最も好ましい。
摩耗体積は、例えば0.02mm3以上であってもよい。
摩耗直径は、2.1mm以下であることが好ましく、2.0mm以下であることがより好ましく、1.9mm以下であることがさらに好ましく、1.8mm以下であることが特に好ましく、1.7mm以下であることが最も好ましい。
摩耗深さは、70μm以下であることが好ましく、65μm以下であることがより好ましく、60μm以下であることがさらに好ましく、55μm以下であることが特に好ましい。
摩耗深さは、例えば10μm以上であってもよい。
重合硬化物の摩耗量の測定についても、牛歯エナメル質の摩耗量と同様の平均値とした。
被覆層の摩耗体積は、0.075mm3以下であることが好ましく、0.07mm3以下であることがより好ましく、0.065mm3以下であることがさらに好ましく、0.06mm3以下であることが特に好ましい。摩耗体積は、例えば0.02mm3以上であってもよい。
前記調製した、直方体のジルコニア基材上に、「クリアフィル(登録商標)セラミック(登録商標)プライマープラス」(クラレノリタケデンタル株式会社製)を塗布してエアブローにて乾燥させた後、前記調製した組成物を塗布し、表1に記載の条件で硬化させ、試験片を得た。ストローク式摩耗試験機(株式会社東京技研製)に市販歯ブラシ(ビトイーン山切り、カットレギュラー、ライオン株式会社製)を固定し、試験片の被覆した面を上にして、市販の歯磨材(デンタークリアMAX(ライオン))/蒸留水=90/10質量部の懸濁液の存在下、荷重250g、40,000サイクルの摩耗試験を行った。摩耗試験後、試験片表面の光沢度を光沢計(日本電色工業社製VG-107)を用いて測定し(n=2)、平均値を、鏡を100%としたときの割合で示した。測定の角度は60°とした。
光沢度は、天然歯と同等の光沢を長期間に亘って維持できる滑沢耐久性の観点から、70%以上であることが好ましく、75%以上であることがより好ましく、80%以上であることがさらに好ましく、85%以上であることが特に好ましい。
また、摩耗試験後、表面粗さ(算術平均粗さRa)を表面粗さ計「レーザフォーカス変位計 LT-8100」(株式会社キーエンス製)で測定し、平均値を算出した(n=2)。
算術平均粗さRaは、3.8μm以下であることが好ましく、3.3μm以下であることがより好ましく、2.8μm以下であることがさらに好ましく、2.3μm以下であることが特に好ましい。
算術平均粗さRaは、例えば1.0μm以上であってもよい。表中、「摩耗後表面粗さ(μm)」は、算術平均粗さRa(μm)を表す。
前記調製した円盤状のジルコニア基材について、オリンパス株式会社製の分光測色計「クリスタルアイ」を用いて、測定モード7band、LED光源で、L*a*b*評価系(JIS Z 8781-4:2013 測色-第4部:CIE 1976 L*a*b*色空間)による色度を測定し、これらをL*0、a*0、b*0とした。その後、前記調製した円盤状のジルコニア基材上に、「クリアフィル(登録商標)セラミック(登録商標)プライマープラス」(クラレノリタケデンタル株式会社製)を塗布してエアブローにて乾燥させた後、前記調製した組成物を塗布し、表1に記載の条件で硬化させ、試験片を得た。
試験片の色度を上述のジルコニア基材の色度の測定と同様の方法にて測定し、これらをL*1、a*1、b*1とした。得られたそれぞれの値を下式に代入し、変色の指標であるΔE*を求めた(n=1)。
ΔE*={(L*1-L*0)2+(a*1-a*0)2+(b*1-b*0)2}1/2
また、実施例1~13は、すべてのサンプルで操作性に優れ、比較例3と比較して、操作性及び滑沢耐久性に優れていた。
さらに、実施例1~13は、比較例4の市販品と比較して、操作性、滑沢耐久性及び色調変化の抑制効果に優れていた。
また、実施例1~13については、比較例5の市販品と比較して、歯科用硬化性組成物の重合硬化物は、口腔内環境下においても、摩耗体積が小さい等の良好な耐摩耗性を有することがわかった。
さらに、実施例1~13については、単官能チオールを含有する比較例6と比較して、歯科用硬化性組成物の滑沢耐久性及び色調変化の抑制効果に優れていた。
また、実施例1~13については、硬化物が耐摩耗性に優れ、比較例5~7に比べて、対合歯の耐摩耗性にも優れていた。
Claims (26)
- 重合性化合物(A)、1分子中に2個以上のメルカプト基を有する多官能チオール(B)、ポリシロキサン(C)、及び重合開始剤(D)を含む、歯科用硬化性組成物。
- 前記ポリシロキサン(C)が、ポリシルセスキオキサン(C-1)を含む、請求項1に記載の歯科用硬化性組成物。
- 前記重合性化合物(A)がウレタン(メタ)アクリレートオリゴマー(A-1)、及び/又は重合性単量体(A-2)を含む、請求項1又は2に記載の歯科用硬化性組成物。
- 前記多官能チオール(B)が、1分子中に2~4個のメルカプト基を有する多官能チオールを含む、請求項1~3のいずれか一項に記載の歯科用硬化性組成物。
- 前記多官能チオール(B)におけるメルカプト基が、第2級炭素原子、又は第3級炭素原子に結合している、請求項1~4のいずれか一項に記載の歯科用硬化性組成物。
- 前記ポリシロキサン(C)が25℃で液体である、請求項1~5のいずれか一項に記載の歯科用硬化性組成物。
- 前記重合開始剤(D)が光重合開始剤(D-1)を含む、請求項1~6のいずれか一項に記載の歯科用硬化性組成物。
- フィラー(E)をさらに含む、請求項1~7のいずれか一項に記載の歯科用硬化性組成物。
- 前記フィラー(E)が疎水性シリカ(E-1)を含む、請求項8に記載の歯科用硬化性組成物。
- 前記疎水性シリカ(E-1)の平均一次粒子径が5~100nmである、請求項9に記載の歯科用硬化性組成物。
- 前記歯科用硬化性組成物が基材を被覆するための被覆剤である、請求項1~10のいずれか一項に記載の歯科用硬化性組成物。
- 前記基材が、ジルコニア、アルミナ、石英ガラス、リチウムシリケートガラス、アクリル樹脂、及びポリマー樹脂と無機充填材を含む複合材料からなる群より選択される少なくとも1種を含む、請求項11に記載の歯科用硬化性組成物。
- 前記ジルコニアが、ジルコニアと、ジルコニアの相転移を抑制可能な安定化剤とを含む、請求項12に記載の歯科用硬化性組成物。
- 基材と樹脂層を含む歯科用補綴物であって、
前記樹脂層が、重合性化合物(A)、1分子中に2個以上のメルカプト基を有する多官能チオール(B)、ポリシロキサン(C)、及び重合開始剤(D)を含む歯科用硬化性組成物の重合硬化物を含む、歯科用補綴物。 - 前記基材が、ジルコニア、アルミナ、石英ガラス、リチウムシリケートガラス、アクリル樹脂、及びポリマー樹脂と無機充填材を含む複合材料からなる群より選択される少なくとも1種を含む、請求項14に記載の歯科用補綴物。
- 前記ジルコニアが、ジルコニアと、ジルコニアの相転移を抑制可能な安定化剤とを含む、請求項15に記載の歯科用補綴物。
- 前記樹脂層の厚さが、1μm~500μmである、請求項14~16のいずれか一項に記載の歯科用補綴物。
- 前記ポリシロキサン(C)が、ポリシルセスキオキサン(C-1)を含む、請求項14~17のいずれか一項に記載の歯科用補綴物。
- 前記重合性化合物(A)がウレタン(メタ)アクリレートオリゴマー(A-1)、及び/又は重合性単量体(A-2)を含む、請求項14~18のいずれか一項に記載の歯科用補綴物。
- 前記多官能チオール(B)が、1分子中にメルカプト基を2~4個を有する多官能チオールを含む、請求項14~19のいずれか一項に記載の歯科用補綴物。
- 前記多官能チオール(B)におけるメルカプト基が、第2級炭素原子、又は第3級炭素原子に結合している、請求項14~20のいずれか一項に記載の歯科用補綴物。
- 前記ポリシロキサン(C)が25℃で液体である、請求項14~21のいずれか一項に記載の歯科用補綴物。
- 前記重合開始剤(D)が光重合開始剤(D-1)を含む、請求項14~22のいずれか一項に記載の歯科用補綴物。
- 前記樹脂層がフィラー(E)をさらに含む、請求項14~23のいずれか一項に記載の歯科用補綴物。
- 前記フィラー(E)が疎水性シリカ(E-1)を含む、請求項24に記載の歯科用補綴物。
- 前記疎水性シリカ(E-1)の平均一次粒子径が5~100nmである、請求項25に記載の歯科用補綴物。
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JP2001149385A (ja) | 1999-11-25 | 2001-06-05 | Kuraray Co Ltd | 歯科用補綴物 |
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JP2016153382A (ja) | 2015-02-20 | 2016-08-25 | クラレノリタケデンタル株式会社 | 歯科用硬化性組成物 |
JP2018089312A (ja) | 2016-12-07 | 2018-06-14 | クラレノリタケデンタル株式会社 | 歯科用補綴物 |
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JP2021054813A (ja) | 2019-09-26 | 2021-04-08 | 株式会社松風 | 光重合型歯科用表面被覆材組成物 |
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- 2022-06-28 JP JP2023531999A patent/JPWO2023277042A1/ja active Pending
- 2022-06-28 KR KR1020237043168A patent/KR20240026916A/ko unknown
- 2022-06-28 CN CN202280047047.6A patent/CN117597099A/zh active Pending
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JPH0357916B2 (ja) | 1981-04-09 | 1991-09-03 | Basf Ag | |
JPS6426505A (en) * | 1987-07-22 | 1989-01-27 | Showa Denko Kk | Photo-setting composition for dental material |
JP2001149385A (ja) | 1999-11-25 | 2001-06-05 | Kuraray Co Ltd | 歯科用補綴物 |
JP2005154312A (ja) | 2003-11-21 | 2005-06-16 | Gc Corp | 光重合型歯科用表面被覆材 |
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JP2021054813A (ja) | 2019-09-26 | 2021-04-08 | 株式会社松風 | 光重合型歯科用表面被覆材組成物 |
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