Composition for three-dimensional modeling and method for producing dental modeled object

Abstract

A composition for three-dimensional modeling that contains a polymerizable monomer, inorganic particles, and a photopolymerization initiator, wherein the inorganic particles are surface treated by a compound represented by general formula (1) (in the formula, R1 is a hydrogen atom or a methyl group, R2 is a hydrolyzable group, R3 is a C1-6 hydrocarbon group, p is 2 or 3, and q is an integer of 5 to 13.).

Description

Composition for three-dimensional modeling and method for manufacturing dental model

[0001] The present invention relates to a composition for three-dimensional modeling and a method for producing a dental model.

[0002] In recent years, techniques for three-dimensionally forming objects have been developed. For example, in the field of dentistry, techniques for three-dimensionally forming dental objects are known (see Patent Documents 1 and 2).

[0003] JP 2015-43793 A JP 2016-505525 A

[0004] Three-dimensional objects are required to have high abrasion resistance and mechanical strength while still allowing for three-dimensional modeling.

[0005] An object of the present invention is to provide a composition for three-dimensional modeling that can produce a three-dimensional model with high abrasion resistance and mechanical strength.

[0006] One aspect of the present invention is a composition for three-dimensional modeling, which contains a polymerizable monomer, inorganic particles, and a photopolymerization initiator, wherein the inorganic particles are represented by the following general formula (1):

[0007] (wherein R1 is a hydrogen atom or a methyl group, R2 is a hydrolyzable group, R3 is a hydrocarbon group having 1 to 6 carbon atoms, p is 2 or 3, and q is an integer of 5 to 13)

[0008] According to one aspect of the present invention, it is possible to provide a composition for three-dimensional modeling that allows a three-dimensional model to be obtained that has high abrasion resistance and mechanical strength.

[0009] Hereinafter, an embodiment of the present invention will be described.

[0010] <Composition for Three-Dimensional Forming> The composition for three-dimensional forming of the present embodiment contains a polymerizable monomer, inorganic particles, and a photopolymerization initiator.

[0011] [Polymerizable Monomer] The polymerizable monomer is not particularly limited, but examples thereof include (meth)acrylate. In this specification, (meth)acrylate refers to acrylate and / or methacrylate.

[0012] Examples of (meth)acrylates include ethoxylated bisphenol A dimethacrylate, triethylene glycol dimethacrylate, urethane dimethacrylate, neopentyl glycol dimethacrylate, and glycerin dimethacrylate. Among these, (meth)acrylates without a urethane group, such as ethoxylated bisphenol A dimethacrylate and triethylene glycol dimethacrylate, are preferred. These (meth)acrylates may be used alone or in combination of two or more.

[0013] The content of the polymerizable monomer in the composition for three-dimensional modeling is not particularly limited, but the lower limit is, for example, preferably 40% by mass or more, more preferably 45% by mass or more, and even more preferably 50% by mass or more, and the upper limit is, for example, preferably 80% by mass or less, more preferably 75% by mass or less, and even more preferably 70% by mass or less.

[0014] When the content of the polymerizable monomer is 40% by mass or more, the viscosity of the composition for three-dimensional modeling can be reduced and the bending strength of the three-dimensional model can be improved, and when the content of the polymerizable monomer is 80% by mass or less, the abrasion resistance and bending strength of the obtained three-dimensional model can be improved.

[0015] [Inorganic Particles] The inorganic particles are represented by the following general formula (1):

[0016] In formula (1), R1 is a hydrogen atom or a methyl group, R2 is a hydrolyzable group, R3 is a hydrocarbon group having 1 to 6 carbon atoms, p is 2 or 3, and q is an integer of 5 to 13. q is preferably an integer of 6 to 11, and more preferably an integer of 7 to 9.

[0017] The compound for surface treating the inorganic particles is not particularly limited, and examples thereof include 5-methacryloyloxypentyltrimethoxysilane, 6-methacryloyloxyhexyltrimethoxysilane, 7-methacryloyloxyheptyltrimethoxysilane, 8-methacryloyloxyoctyltrimethoxysilane, 9-methacryloyloxynonyltrimethoxysilane, 10-methacryloyloxydecyltrimethoxysilane, 11-methacryloyloxyundecyltrimethoxysilane, 12-methacryloyloxydodecyltrimethoxysilane, 13-methacryloyloxytridecyltrimethoxysilane, 5-methacryloyloxypentyltriethoxysilane, 6-methacryloyloxyhexyltriethoxysilane, 7-methacryloyloxyheptyltriethoxysilane, 8-methacryloyloxyoctyltriethoxy ...pentyltriethoxysilane, 6-methacryloyloxyhexyltriethoxysilane, 7-methacryloyloxyheptyltriethoxysilane, 8-methacryloyloxyoctyltriethoxysilane, 9-methacryloyloxypentyltriethoxysilane, 6-methacryloyloxyhexyltriethoxysilane, 7-methacryloyloxyh

[0043] Examples of surface treatment agents include methacryloyloxynonyltriethoxysilane, 10-methacryloyloxydecyltriethoxysilane, 11-methacryloyloxyundecyltriethoxysilane, 12-methacryloyloxydodecyltriethoxysilane, 13-methacryloyloxytridecyltriethoxysilane, 5-methacryloyloxypentyltripropoxysilane, 6-methacryloyloxyhexyltripropoxysilane, 7-methacryloyloxyheptyltripropoxysilane, 8-methacryloyloxyoctyltripropoxysilane, 9-methacryloyloxynonyltrippropoxysilane, 10-methacryloyloxydecyltrippropoxysilane, 11-methacryloyloxyundecyltrippropoxysilane, 12-methacryloyloxydodecyltrippropoxysilane, and 13-methacryloyloxytridecyltrippropoxysilane. These surface treatment agents may be used alone or in combination of two or more.

[0018] Examples of inorganic particles to be surface-treated include various glasses (e.g., E-glass, barium glass, lanthanum glass) containing silica as the main component and, as necessary, oxides of heavy metals, boron, aluminum, etc., various ceramics, composite oxides (e.g., silica-titania composite oxide, silica-zirconia composite oxide), kaolin, clay minerals (e.g., montmorillonite), mica, ytterbium fluoride, yttrium fluoride, etc. These may be used alone or in combination of two or more.

[0019] The volume median particle diameter of the inorganic particles is preferably 0.1 μm or more and 2.0 μm or less, more preferably 0.2 μm or more and 1.5 μm or less, and even more preferably 0.3 μm or more and 1.0 μm or less. When the volume median particle diameter of the inorganic particles is 0.1 μm or more, a decrease in bending strength of the cured product of the composition for three-dimensional modeling is suppressed, and when it is 2.0 μm or less, a decrease in abrasion resistance is suppressed.

[0020] In this specification, the volume median particle size refers to the median particle size in a volume particle size distribution. The volume particle size distribution can be measured by a laser diffraction / scattering method.

[0021] The content of inorganic particles in the composition for three-dimensional modeling is not particularly limited, but the lower limit is, for example, preferably 30% by mass or more, more preferably 35% by mass or more, and even more preferably 40% by mass or more, and the upper limit is, for example, preferably 60% by mass or less, more preferably 55% by mass or less, and even more preferably 50% by mass or less.

[0022] When the content of inorganic particles is 30% by mass or more, the abrasion resistance and bending strength of an object molded from the composition for three-dimensional modeling can be improved, and when the content of inorganic particles is 60% by mass or less, an increase in the viscosity of the composition for three-dimensional modeling can be suppressed, facilitating the production of a three-dimensional object.

[0023] [Photopolymerization Initiator] The photopolymerization initiator is not particularly limited, and examples thereof include camphorquinone, benzil, diacetyl, benzil dimethyl ketal, benzil diethyl ketal, benzil bis(2-methoxyethyl) ketal, 4,4′-dimethylbenzyl dimethyl ketal, anthraquinone, 1-chloroanthraquinone, 2-chloroanthraquinone, 1,2-benzanthraquinone, 1-hydroxyanthraquinone, 1-methylanthraquinone, 2-ethylanthraquinone, 1-bromoanthraquinone, thioxanthone, 2-isopropylthioxanthone, 2-nitrothioxanthone, 2-methylthioxanthone, and 2,4-dimethylthioxanthone. Examples of the photopolymerization initiator include xanthone, 2,4-diethylthioxanthone, 2,4-diisopropylthioxanthone, 2-chloro-7-trifluoromethylthioxanthone, thioxanthone-10,10-dioxide, thioxanthone-10-oxide, benzoin methyl ether, benzoin ethyl ether, isopropyl ether, benzoin isobutyl ether, benzophenone, bis(4-dimethylaminophenyl)ketone, 4,4'-bisdiethylaminobenzophenone, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, etc. One of these photopolymerization initiators may be used alone, or two or more of them may be used in combination.

[0024] The content of the photopolymerization initiator in the composition for three-dimensional modeling is not particularly limited, and the lower limit is, for example, preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and even more preferably 0.1% by mass or more, and the upper limit is, for example, preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 1% by mass or less.

[0025] When the content of the photopolymerization initiator is 0.01% by mass or more, the production of a three-dimensional object becomes easy. When the content of the polymerization initiator is 10% by mass or less, the production of a three-dimensional object becomes easy and discoloration of the object is suppressed.

[0026] The composition for three-dimensional modeling of the present embodiment may further contain a tertiary amine, a polymerization inhibitor, an ultraviolet absorber, a pigment, and the like, as necessary.

[0027] Examples of tertiary amines include tertiary aliphatic amines such as N,N-dimethylaminoethyl methacrylate and triethanolamine; alkyl p-dialkylaminobenzoates (e.g., methyl p-dimethylaminobenzoate, ethyl p-dimethylaminobenzoate, propyl p-dimethylaminobenzoate, amyl p-dimethylaminobenzoate, isoamyl p-dimethylaminobenzoate, ethyl p-diethylaminobenzoate, and alkyl p-diethylaminobenzoate); tertiary aromatic amines such as N,N-propyl acetate, 7-dimethylamino-4-methylcoumarin, N,N-dimethylaniline, N,N-dibenzylaniline, N,N-dimethyl-p-toluidine, N,N-diethyl-p-toluidine, N,N-bis(2-hydroxyethyl)-p-toluidine, N,N,2,4,6-pentamethylaniline, N,N,2,4-tetramethylaniline, and N,N-diethyl-2,4,6-trimethylaniline; and the like.

[0028] These tertiary amines may be used alone or in combination of two or more. Among these, tertiary aromatic amines are preferred, and alkyl p-dialkylaminobenzoates are more preferred.

[0029] The content of the tertiary amine in the composition for three-dimensional modeling is not particularly limited, but is preferably 0.01% by mass to 10% by mass, more preferably 0.05% by mass to 5% by mass, and even more preferably 0.1% by mass to 1% by mass. When the content of the tertiary amine in the composition for three-dimensional modeling is 0.01% by mass to 10% by mass, the abrasion resistance and mechanical strength of the composition for three-dimensional modeling are improved.

[0030] Examples of the polymerization inhibitor include 2,6-di-tert-butyl-p-cresol, 6-tert-butyl-2,4-xylenol, hydroquinone, dibutylhydroquinone, dibutylhydroquinone monomethyl ether, 2,6-di-tert-butylphenol, 4-methoxyphenol, etc. These polymerization inhibitors may be used alone or in combination of two or more.

[0031] The content of the polymerization inhibitor in the composition for three-dimensional modeling is not particularly limited, but is preferably 0.0005% by mass to 5% by mass, more preferably 0.001% by mass to 3% by mass, and even more preferably 0.005% by mass to 1% by mass. When the content of the photopolymerization initiator in the composition for three-dimensional modeling is 0.0005% by mass to 5% by mass, the storage stability of the composition for three-dimensional modeling is improved.

[0032] Examples of ultraviolet absorbers include 2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene, 2-(2H-benzotriazol-2-yl)-4-methylphenol, and 2-ethylhexyl 2-cyano-3,3-diphenylacrylate.

[0033] The ultraviolet absorber may be used alone or in combination of two or more. Among these, 2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene is preferred in terms of improving the printability of the resulting three-dimensional model, and 2-(2H-benzotriazol-2-yl)-4-methylphenol, 2-cyano-3,3-diphenylacrylic acid 2-ethylhexyl, etc. are preferred in terms of improving the photostability of the three-dimensional modeling composition.

[0034] The content of the ultraviolet absorber in the composition for three-dimensional modeling is not particularly limited, but is preferably 0.0005% by mass to 5% by mass, more preferably 0.001% by mass to 3% by mass, and even more preferably 0.005% by mass to 1% by mass. When the content of the photopolymerization initiator in the composition for three-dimensional modeling is 0.0005% by mass to 5% by mass, the storage stability of the composition for three-dimensional modeling is improved, and the printability of the resulting three-dimensional model is improved.

[0035] Examples of pigments include titanium dioxide (white), iron oxide (yellow / red), triiron tetroxide (black), etc. These may be used alone or in combination of two or more.

[0036] The content of the pigment in the composition for three-dimensional modeling is preferably 0.001% by mass or more and 1% by mass or less, and more preferably 0.05% by mass or more and 0.5% by mass or less.

[0037] The viscosity of the three-dimensional modeling composition of this embodiment is, for example, preferably 200 mPa·s or more and 1500 mPa·s or less, more preferably 300 mPa·s or more and 1300 mPa·s or less, and even more preferably 400 mPa·s or more and 1000 mPa·s or less. When the viscosity of the three-dimensional modeling composition is 200 mPa·s or more and 1500 mPa·s or less, modeling of a three-dimensional model using the composition becomes easy. Here, the viscosity refers to the viscosity at 35°C measured using a Brookfield viscometer.

[0038] As described above, the composition for three-dimensional modeling of this embodiment contains a polymerizable monomer, inorganic particles, and a photopolymerization initiator, and the inorganic particles are surface-treated with the compound represented by the above general formula (1). As a result, the composition for three-dimensional modeling of this embodiment can improve abrasion resistance and mechanical strength while enabling three-dimensional modeling of the resulting three-dimensional object.

[0039] Furthermore, in the composition for 3-D modeling of this embodiment, as described above, the volume median particle size of the inorganic particles is 0.1 μm or more and 2.0 μm or less, and therefore, a dental object 3-D modeled using such a composition for 3-D modeling can maintain high abrasion resistance and mechanical strength.

[0040] Furthermore, as described above, the viscosity of the composition for three-dimensional modeling according to this embodiment is 200 mPa·s or more and 1500 mPa·s or less, which makes it easy to three-dimensionally model a dental object using such a composition for three-dimensional modeling.

[0041] The use of the composition for three-dimensional modeling of the present embodiment is not limited, and it can be used, for example, for three-dimensional modeling of dental objects.

[0042] The dental object to be three-dimensionally shaped is not particularly limited, but examples thereof include dental prostheses such as crowns, bridges, inlays, onlays, veneers, temporary teeth, and artificial teeth.

[0043] When the composition for three-dimensional modeling of this embodiment is used for three-dimensional modeling of a dental object, the resulting dental object can directly achieve the same effects as those obtained by the composition for three-dimensional modeling of this embodiment.

[0044] Specifically, as described above, the composition for three-dimensional modeling of this embodiment contains a polymerizable monomer, inorganic particles, and a photopolymerization initiator, and the inorganic particles are surface-treated with the compound represented by the general formula (1). Therefore, a dental object three-dimensionally modeled using such a composition for three-dimensional modeling can exhibit high abrasion resistance and mechanical strength.

[0045] <Method for manufacturing a dental object> The method for manufacturing a dental object according to this embodiment includes a step of layering the composition for 3-D modeling according to this embodiment and 3-D modeling a dental object. The dental object obtained by this manufacturing method is not particularly limited, but examples thereof include a dental prosthesis that is 3-D modeled using the composition for 3-D modeling described above.

[0046] A known 3D printer can be used to laminate the three-dimensional modeling composition. Examples of 3D printer methods include stereolithography (SLA) and digital light processing (DLP), with the DLP method being preferred. Commercially available DLP 3D printers include the MAX UV (manufactured by Asiga).

[0047] Examples of methods for laminating the composition for three-dimensional modeling include a method of irradiating a container containing the composition for three-dimensional modeling with light from above (free liquid level method), a method of irradiating a container with the composition for three-dimensional modeling with light from below (regulated liquid level method), etc. Among these, the regulated liquid level method is preferred.

[0048] When manufacturing dental objects using the controlled liquid level method, the bottom surface of the container is optically transparent, and light emitted from below the container passes through the bottom surface of the container and is irradiated onto the three-dimensional modeling composition.

[0049] When a dental object is produced using the composition for three-dimensional modeling of this embodiment, examples of light to be irradiated onto the composition for three-dimensional modeling include ultraviolet light having a wavelength of 380 to 450 nm and visible light.

[0050] Examples of light sources for irradiating the composition for three-dimensional formation include LED lasers, LED lamps, and LED projectors.

[0051] The method for manufacturing a dental object may further include a step of cleaning the dental object, a step of post-polymerizing the three-dimensional object, and the like.

[0052] In the method for manufacturing a dental object according to this embodiment, the composition for 3D modeling according to this embodiment is used for 3D modeling of a dental object, and the resulting dental object thereby exhibits the same effects as those obtained by the composition for 3D modeling according to this embodiment.

[0053] Specifically, as described above, the composition for three-dimensional modeling according to this embodiment contains a polymerizable monomer, inorganic particles, and a photopolymerization initiator, and the inorganic particles are surface-treated with the compound represented by the general formula (1). Therefore, in the method for manufacturing a dental object according to this embodiment, by 3D modeling using such a composition for three-dimensional modeling, the resulting dental object can exhibit high abrasion resistance and mechanical strength.

[0054] Furthermore, in the composition for 3-D modeling according to this embodiment, the inorganic particles have a volume median particle size of 0.1 μm or more and 2.0 μm or less, as described above. Therefore, in the method for manufacturing a dental object according to this embodiment, by 3-D modeling using such a composition for 3-D modeling, the obtained dental object can maintain high abrasion resistance and mechanical strength.

[0055] As described above, the viscosity of the composition for three-dimensional modeling according to this embodiment is 200 mPa·s or more and 1500 mPa·s or less. Therefore, in the method for manufacturing a dental object according to this embodiment, three-dimensional modeling is performed using such a composition for three-dimensional modeling, which facilitates three-dimensional modeling of the resulting dental object.

[0056] Examples of the present invention will be described below, but the present invention is not limited to these examples. In the following, numerical values ​​without units are based on mass (% by mass) unless otherwise specified.

[0057] <Production of Inorganic Particles> Inorganic particles were produced under the conditions shown in Table 1.

[0058] (Inorganic Particles A-1) Irregular shaped barium glass particles (G018-053, manufactured by Schott) having a volume median particle size (hereinafter referred to as average particle size) of 0.4 μm were surface treated with 8-methacryloyloxyoctyltrimethoxysilane to obtain inorganic particles A-1 having an average particle size of 0.4 μm.

[0059] (Inorganic Particles A-2) Inorganic particles A-2 having an average particle size of 0.7 μm were obtained in the same manner as inorganic particles A-1, except that irregular barium glass particles (G018-053, manufactured by Schott) having an average particle size of 0.7 μm were used.

[0060] (Inorganic Particles A-3) Inorganic particles A-3 having an average particle size of 1.5 μm were obtained in the same manner as inorganic particles A-1, except that irregular barium glass particles (G018-053, manufactured by Schott) having an average particle size of 1.5 μm were used.

[0061] (Inorganic Particles B-1) Inorganic particles B-1 having an average particle size of 0.7 μm were obtained in the same manner as inorganic particles A-2, except that 3-methacryloyloxypropyltrimethoxysilane was used instead of 8-methacryloyloxyoctyltrimethoxysilane.

[0062] (Inorganic Particles B-2) Inorganic particles B-2 having an average particle size of 1.5 μm were obtained in the same manner as inorganic particles A-3, except that 3-methacryloyloxypropyltrimethoxysilane was used instead of 8-methacryloyloxyoctyltrimethoxysilane.

[0063]

[0064] <Preparation of Composition for Three-Dimensional Forming> Compositions for three-dimensional forming were prepared according to the formulations shown in Table 2. The prepared compositions for three-dimensional forming were in a paste form.

[0065]

[0066] The abbreviations in Table 2 are as follows:

[0067] Bis-MEPP 1: Ethoxylated bisphenol A dimethacrylate BPE-100 (manufactured by Shin-Nakamura Chemical Co., Ltd.) Bis-MEPP 2: Ethoxylated bisphenol A dimethacrylate BPE-500 (manufactured by Shin-Nakamura Chemical Co., Ltd.) TEGDMA: Triethylene glycol dimethacrylate UDMA: Bis(2-methacryloyloxyethyl)-2,2,4-trimethylhexamethylene dicarbamate TPO: (2,4,6-trimethylbenzoyl)diphenylphosphine oxide DME: Ethyl 4-dimethylaminobenzoate BHT: 2,6-di-tert-butyl-p-cresol Tinuvin (registered trademark) P: 2-(2H-benzotriazol-2-yl)-4-methylphenol (manufactured by BASF) Pigment: Pigment containing titanium dioxide (white)

[0068] <Viscosity of Paste> The viscosity of the three-dimensional modeling composition (paste form) at 35°C was measured using a Brookfield viscometer.

[0069] The viscosity was evaluated as pass (good) when the viscosity was 1000 mPa·s or less, and as fail (poor) when the viscosity exceeded 1000 mPa·s.

[0070] <Three-Point Bending Strength> A 2 × 2 × 25 mm test piece was designed using CAD software (Asiga, Composer (registered trademark)), and then the test piece was 3D-printed using a DLP 3D printer (Asiga, MAX385) and a 3D modeling composition (paste-like). The resulting 3D model was thoroughly washed with isopropanol, and then post-polymerized using a dental photopolymerizer to produce a test piece.

[0071] The test specimen was polished using waterproof abrasive paper and then stored for 24 hours in water at 37° C. Next, a three-point bending test was carried out on the test specimen using a small tabletop testing machine (Shimadzu, EZ test) at a crosshead speed of 1 mm / min, and the three-point bending strength was measured as the mechanical strength.

[0072] In the evaluation of the three-point bending strength, a three-point bending strength of 120 MPa or more is considered to be pass (good), and a three-point bending strength of less than 120 MPa is considered to be fail (poor).

[0073] The prepared compositions for three-dimensional modeling were subjected to the following tests and evaluated. The evaluation results are shown in Table 2.

[0074] <Wear Amount> A test specimen was designed using CAD software (Asiga, Composer (registered trademark)), and then 3D-printed using a DLP 3D printer (Asiga, MAX385) and a paste for 3D printing. The 3D-printed object was thoroughly washed with isopropanol, and then post-polymerized using a dental photopolymerizer. The 3D-printed object was then stored in distilled water at 37°C for 24 hours to obtain a test specimen.

[0075] The test piece was attached to a bite wear tester (Tokyo Giken Co., Ltd.), the unpolymerized layer was polished with #1000 abrasive paper, and the total length of the test piece before the test was measured. A slurry of equal amounts of glycerin and polymethyl acrylate (PMMA) (Mitsubishi Rayon Co., Ltd., ACRYCON AC) was placed on the bite wear tester, and a test was performed simulating 100,000 bites up and down and left and right against a polymethyl acrylate (PMMA) plate. The total length of the test piece after the test was measured, and the difference before and after the test was taken as the amount of wear, and the wear resistance was evaluated.

[0076] The abrasion resistance was evaluated as pass (good) when the amount of abrasion was 20 μm or less, and as fail (poor) when the amount of abrasion was more than 20 μm.

[0077] As can be seen from Table 2, the three-dimensional objects obtained using the compositions for three-dimensional modeling, which contained a polymerizable monomer, inorganic particles, and a photopolymerization initiator, and in which the inorganic particles were surface-treated with 8-methacryloyloxyoctyltrimethoxysilane, were all excellent in viscosity, three-point bending strength, and abrasion resistance (Examples 1 to 7).

[0078] In contrast, objects 3D-modeled using a composition for 3D modeling containing a polymerizable monomer, inorganic particles, and a photopolymerization initiator, in which the inorganic particles were surface-treated with 3-methacryloyloxypropyltrimethoxysilane, were poor in at least one of viscosity, three-point bending strength, and abrasion resistance (Comparative Examples 1 to 4).

[0079] These results demonstrate that a composition for three-dimensional modeling, which contains a polymerizable monomer, inorganic particles, and a photopolymerization initiator, and in which the inorganic particles are surface-treated with the compound represented by general formula (1), can improve the abrasion resistance and mechanical strength of the resulting three-dimensional model while enabling three-dimensional modeling of the resulting three-dimensional object.

[0080] Although the embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments, and various modifications and changes are possible within the scope of the invention described in the claims.

[0081] The above-disclosed embodiments include, for example, the following aspects.

[0082] (Supplementary Note 1) A composition for three-dimensional modeling containing a polymerizable monomer, inorganic particles, and a photopolymerization initiator, wherein the inorganic particles are represented by the following general formula (1):

[0083] (wherein R1 is a hydrogen atom or a methyl group, R2 is a hydrolyzable group, R3 is a hydrocarbon group having 1 to 6 carbon atoms, p is 2 or 3, and q is an integer of 5 to 13).

[0084] (Appendix 2) The composition for three-dimensional modeling according to Appendix 1, wherein the inorganic particles have a volume median particle size of 0.1 μm or more and 2.0 μm or less.

[0085] (Appendix 3) The composition for three-dimensional modeling according to appendix 1 or 2, having a viscosity of 200 mPa·s or more and 1500 mPa·s or less.

[0086] (Appendix 4) The composition for three-dimensional modeling according to any one of Appendices 1 to 3, which is used for three-dimensional modeling of a dental object.

[0087] (Supplementary Note 5) A method for producing a dental object, comprising the step of layering the composition for three-dimensional modeling according to any one of Supplementary Notes 1 to 4 to three-dimensionally model a dental object.

[0088] This application claims priority based on Japanese Patent Application No. 2022-099509, filed on June 21, 2022, the entire contents of which are incorporated herein by reference.

Claims

1. A composition for three-dimensional modeling containing a polymerizable monomer, inorganic particles, and a photopolymerization initiator, wherein the inorganic particles are represented by the following general formula (1): (wherein R1 is a hydrogen atom or a methyl group, R2 is a hydrolyzable group, R3 is a hydrocarbon group having 1 to 6 carbon atoms, p is 2 or 3, and q is an integer of 5 to 13), 2. The composition for three-dimensional modeling according to claim 1, wherein the inorganic particles have a volume median particle size of 0.1 μm or more and 2.0 μm or less.

3. The composition for three-dimensional modeling according to claim 1, having a viscosity of 200 mPa·s or more and 1500 mPa·s or less.

4. The composition for three-dimensional modeling according to any one of claims 1 to 3, which is used for three-dimensional modeling of dental objects.

5. A method for manufacturing a dental object, comprising the step of layering the composition for three-dimensional modeling according to any one of claims 1 to 3 to three-dimensionally model a dental object.