Photocurable restoration composition comprising ceramic composition and dental prosthesis using 3D printer

Abstract

The present invention relates to: a photocurable restoration composition comprising a ceramic composition; and a dental prosthesis using a 3D printer. More specifically, the present invention relates to: a photocurable restoration composition comprising a silane-treated ceramic composition; and a dental prosthesis manufactured using the photocurable restoration composition by using a 3D printer. According to the present invention, it is possible to obtain a dental prosthesis having improved gloss, excellent thermal resistance and hardness, and improved uniformity and reliability.

Description

Photocurable restorative composition comprising a ceramic composition and a dental prosthesis using a 3D printer

[0001] The present invention relates to a photocurable restorative composition comprising a ceramic composition and a dental prosthesis using a 3D printer, and more specifically, to a photocurable restorative composition manufactured including a silane-treated ceramic composition, and a dental prosthesis manufactured using the photocurable restorative composition using a 3D printer.

[0002] This application claims priority to Korean Patent Application No. 10-2023-0168008, filed November 28, 2023, the entire disclosure of which is incorporated herein by reference.

[0003]

[0004] An artificial replacement for a tooth or dental tissue is called a dental prosthesis.

[0005] Dental prosthetics include removable dentures and non-removable crowns and bridges.

[0006] Polymers, metals, alloys, ceramics, and composite materials are used as materials for dental prostheses. Generally, precious metal materials such as gold, non-precious metal alloy materials such as nickel-chromium alloy or cobalt-chromium alloy, and ceramic materials are widely used.

[0007] Recently, with the improvement of living standards, users' expectations for aesthetic aspects are increasing, and in the case of dental prosthetics that cover the entire tooth, such as crowns, the demand for dental prosthetics using ceramic materials is increasing more than that of conventional metal prosthetics.

[0008] As a ceramic material, the use of dental prosthetics using zirconia is increasing due to its mechanical performance such as strength and durability. However, zirconia has limitations in terms of aesthetics due to its cloudy surface color.

[0009] Accordingly, dental prostheses manufactured by coating a porcelain layer on a zirconia core are becoming more preferred over those manufactured using zirconia as a sole material.

[0010] [Prior Art Literature]

[0011] [Patent Document]

[0012] (Patent Document 1) KR 2023-0073986

[0013]

[0014] The present invention was derived from the aforementioned necessity, and its purpose is to obtain a dental prosthesis having improved gloss, superior heat resistance and hardness, and improved uniformity and reliability.

[0015]

[0016] The photocurable restorative composition according to the embodiment may include a silane-treated ceramic composition and a photoinitiator mixture in a weight ratio of 1:1 to 20:1.

[0017] The above silane-treated ceramic composition comprises a silica mixture, ZrO 2, A silane solution can be mixed into a ceramic composition containing BaO.

[0018] In the above ceramic composition,

[0019] The above ZrO2 may be included in an amount of 1 to 20 parts by weight per 100 parts by weight of the silica mixture.

[0020] In the above ceramic composition,

[0021] The above BaO may be included in an amount of 1 to 20 parts by weight per 100 parts by weight of the silica mixture.

[0022] The above ceramic composition and the above silane solution can be mixed and dried in a weight ratio of 1:1 to 5:1 to produce the silane-treated ceramic composition.

[0023] The above photoinitiator mixture may include an acrylate monomer, a photoinitiator, and a thermal initiator.

[0024] The above photoinitiator may be included in an amount of 0.1 to 4 parts by weight based on 100 parts by weight of the above acrylate monomer.

[0025] The above photoinitiator includes TPO, and the TPO may be included in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of the acrylate monomer.

[0026] The photoinitiator includes BAPO, and the BAPO may be included in an amount of 0.1 to 1 part by weight based on 100 parts by weight of the acrylate monomer.

[0027] The above thermal initiator may be included in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the acrylate monomer.

[0028] A method for manufacturing a photocurable restorative composition according to an embodiment comprises: a silica mixture, ZrO 2, A step of preparing a silane-treated ceramic composition by mixing and drying a silane solution into a ceramic composition including BaO; and

[0029] It may include a step of preparing a photocurable restorative composition by adding a photoinitiator mixture to the above silane-treated ceramic composition at a weight ratio of 1:1 to 20:1.

[0030] A method for manufacturing a dental prosthesis according to an embodiment comprises the steps of forming a core by laminating and curing a photocurable restorative composition manufactured by the above method using a 3D printer; and

[0031] A step of performing heat treatment on the above core may be included.

[0032] The dental prosthesis according to the embodiment may be manufactured according to the above method.

[0033]

[0034] According to the present invention, a dental prosthesis having improved gloss, superior heat resistance and hardness, and improved uniformity and reliability can be obtained.

[0035]

[0036] Figure 1 is a graph showing the relationship between temperature and hardness during the manufacture of dental prostheses according to an embodiment.

[0037] Figures 2 to 4 are examples of dental prostheses manufactured according to embodiments of the present invention.

[0038]

[0039] Hereinafter, the present invention will be described in detail. Prior to this, it should be noted that the terms and words used in this specification and claims should not be interpreted as limited to their conventional or dictionary meanings. Rather, they should be interpreted with meanings and concepts that conform to the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the term to best explain his or her invention. Accordingly, the configurations described in the embodiments described in this specification are merely the most preferred embodiments of the present invention and do not represent the entire technical spirit of the present invention. Therefore, it should be understood that various equivalents and modified examples may exist as of the time of this application.

[0040] [Photocurable restorative composition]

[0041] The above photocurable restorative composition means a restorative composition containing a material that is cured by light irradiation, and may contain a silane-treated ceramic composition and a photoinitiator mixture in a weight ratio of 1:1 to 20:1, preferably 1:1 to 10:1, and more preferably 1:1 to 4:1.

[0042] When the content of the silane-treated ceramic composition according to the present invention is within the above range, the crosslinking density after light curing is increased, the gloss of the dental composition is improved, excellent heat resistance reliability is secured, uniformity is further improved, and the dielectric constant can be significantly reduced.

[0043] On the other hand, if the content of the silane-treated ceramic composition exceeds the above range, uniformity may be poor, long-term reliability may be low, or the developability of the photocurable restorative composition may be reduced due to the high refractive index of silica.

[0044] In addition, if the content of the silane-treated ceramic composition is below the above range, the dielectric constant may increase significantly, and workability may be reduced due to insufficient hardness and stiffness.

[0045]

[0046] [Method for producing a photocurable restorative composition]

[0047] (a) The method for manufacturing the photocurable restorative composition comprises: a silica mixture, ZrO 2, A step of preparing a silane-treated ceramic composition by mixing and drying a silane solution into a ceramic composition including BaO; and

[0048] (b) a step of preparing a photocurable restorative composition by adding a photoinitiator mixture to the silane-treated ceramic composition at a weight ratio of 1:1 to 20:1;

[0049] In the ceramic composition of the above (a), the silica mixture may include first silica (SiO2) particles and second silica (SiO2) particles having different average particle diameters.

[0050] The above first silica particles may have an average particle diameter of 0.1 µm to 1 µm, preferably 0.1 µm to 0.7 µm, and more preferably 0.1 µm to 0.5 µm.

[0051] The above second silica particles may have an average particle diameter of 0.1 µm to 50 µm, preferably 0.1 µm to 40 µm, and more preferably 0.1 µm to 20 µm.

[0052] The first silica particles and the second silica particles may be included in the silica mixture in a weight ratio of 9:1, preferably 8:2, and more preferably 7:3.

[0053] According to the present invention, by mixing silica particles of different sizes within the above average particle diameter range, particularly in the above weight ratio, the packing density per unit area is maximized, and the physical structure of the final product can be configured more densely.

[0054] In the ceramic composition of the above (a), the ZrO2 may be included in an amount of 1 to 20 parts by weight, preferably 1 to 10 parts by weight, and more preferably 2 to 7 parts by weight, per 100 parts by weight of the silica mixture.

[0055] According to the present invention, by using zirconia in the above range, the strength of the final product can be further improved.

[0056] The above ZrO2 may have an average particle diameter of 0.1 µm to 1 µm, preferably 0.1 µm to 0.5 µm, and more preferably 0.1 µm to 0.3 µm.

[0057] Through the above average particle size, it is possible to suppress the occurrence of expected cracks due to volume change due to phase transition during the manufacturing process of the final product.

[0058] In the ceramic composition of the above (a), the BaO may be included in an amount of 1 to 20 parts by weight, preferably 1 to 10 parts by weight, and more preferably 2 to 7 parts by weight, per 100 parts by weight of the silica mixture.

[0059] Heat resistance can be improved by including the above BaO in a value within the above range.

[0060] The above silane-treated (coated) ceramic composition may be manufactured by mixing and drying the ceramic composition and the silane solution in a weight ratio of 1:1 to 5:1, preferably in a weight ratio of 1:1 to 3:1, and more preferably in a weight ratio of 1:1 to 1.5:1 (through the mixing and drying process).

[0061] The above silane solution can be prepared by mixing a silane coupling agent and a solvent.

[0062] Silane coupling agents include vinylchlorosilane, vinyltrimethoxysilane, vinyltriethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropyldiethoxysilane, 3-glycidoxypropyltriethoxysilane, p-styryltrimethoxysilane, 3-methacryloxypropyltriethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropylmethyldiethoxysilane, 3-acryloxypropyltrimethoxysilane, N-2-(aminoethyl)-3-aminopropylmethyldimethoxysilane, At least one selected from the group consisting of N-2-(aminoethyl)-3-aminopropyltrimethoxysilane, N-2-(aminoethyl)-3-aminopropylmethyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-triethoxysilyl-N-(1,3-dimethylbutylidene)propylamine, N-phenyl-3-aminopropyltrimethoxysilane, 3-chloropropyltrimethoxysilane, 3-mercaptopropylmethyldimethoxysilane, 3-mercaptopropyltrimethoxysilane, bis(triethoxysilylpropyl)tetrasulfide, and 3-isocyanatopropyltriethoxysilane may be used.

[0063] The above silane solution may contain 1 to 20 silane coupling agents, preferably 1 to 10 silane coupling agents, and more preferably 1 to 8 silane coupling agents per 100 parts by weight of the silane solution.

[0064] According to the present invention, by including a silane coupling agent in the above range, the shape of the final product can be well fixed without collapsing.

[0065] In the above (b), the silane-treated ceramic composition may include all / part of the silane-treated ceramic composition initially obtained by mixing and drying in step (a).

[0066] In the above (b), the photoinitiator mixture is defined as a mixture including a photoinitiator, and may include an acrylate monomer, a photoinitiator, and a thermal initiator.

[0067] The above acrylate monomers are bisphenol A-glycidyl methacrylate (Bis-GMA), triethylene glycol dimethacrylate (TEGDMA), ethylene glycol dimethacrylate (TGDMA), ethoxylated bisphenol A dimethacrylate (Bis-EMA), urethane dimethacrylate (UDMA), dipentaerythritol pentacrylate monophosphate (PENTA), 2-hydroxyethyl methacrylate (HEMA), polyalkenic acid, biphenyl dimethacrylate (BPDM), glycerol phosphate dimethacrylate (GPDM), and 1,6-hexanediol diacrylate (1,6-Hexanediol diacrylate). It can be characterized by being at least one selected from the group consisting of diacrylate.

[0068] The above acrylate monomer may include UDMA, TEGDMA, and HEMA in a weight ratio of 1:1:1 to 10:10:1, preferably 1:1:1 to 9:8:1.

[0069] The above photoinitiator is a component that induces photopolymerization by being excited by ultraviolet (UV) light or visible light, and any photoinitiator commonly known in the art can be used in the present invention without limitation.

[0070] In an embodiment, the photoinitiator may be characterized by including at least one selected from the group consisting of camphorquinone, 2-(dimethylamino methacrylates), phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (BAPO), and diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO).

[0071] The photoinitiator may be included in an amount of 0.1 to 4 parts by weight, 0.1 to 2 parts by weight, and more preferably 0.1 to 1 part by weight, based on 100 parts by weight of the acrylate monomer.

[0072] When the content of the photoinitiator according to the present invention is within the above range, curing reactivity tends to be improved and long-term reliability tends to be improved, whereas when it exceeds 10 parts by weight, optical properties may deteriorate.

[0073] The above photoinitiator may include BAPO and TPO.

[0074] The above BAPO may be included in an amount of 0.1 to 1 part by weight, preferably 0.1 to 0.5 parts by weight, and more preferably 0.1 to 0.3 parts by weight, based on 100 parts by weight of the above acrylate monomer.

[0075] The above TPO may be included in an amount of 0.1 to 3 parts by weight, preferably 0.1 to 1 part by weight, and more preferably 0.1 to 0.5 parts by weight, based on 100 parts by weight of the above acrylate monomer.

[0076] The above thermal initiator is an initiator used in thermal polymerization, and at least one selected from the group consisting of benzoyl peroxide (BPO) and 2,2-azobisisobutyronitrile (AIBN) can be used.

[0077] The above thermal initiator may be included in an amount of 0.1 to 5 parts by weight, preferably 0.1 to 3 parts by weight, and more preferably 0.1 to 1 part by weight, based on 100 parts by weight of the above acrylate monomer.

[0078] In the above (b), the silane-treated ceramic composition and the photoinitiator mixture can be included in a weight ratio of 1:1 to 20:1, preferably 1:1 to 10:1, and more preferably 1:1 to 4:1 to produce a photocurable restorative composition.

[0079] When the content of the silane-treated ceramic composition according to the present invention is within the above range, the crosslinking density after light curing is increased, the gloss of the dental composition is improved, excellent heat resistance reliability is secured, uniformity is further improved, and the dielectric constant can be significantly reduced.

[0080] On the other hand, if the content of the silane-treated ceramic composition exceeds the above range, uniformity may be poor, long-term reliability may be low, or the developability of the photocurable restorative composition may be reduced due to the high refractive index of silica.

[0081] In addition, if the content of the silane-treated ceramic composition is below the above range, the dielectric constant may increase significantly, and workability may be reduced due to insufficient hardness and stiffness.

[0082]

[0083] [Method for manufacturing dental prosthetics]

[0084] A method for manufacturing a dental prosthesis according to an embodiment comprises the steps of forming a core by laminating and curing a photocurable restorative composition manufactured by the above method using a 3D printer; and

[0085] A step of performing heat treatment on the above core may be included.

[0086] The shape of the above core can be designed based on a scan of a tooth model.

[0087] The core is the part that fills the space by coming into contact with the tooth to be restored, supports the remaining tooth structure, strengthens the retention of the prosthesis, and provides insulation to the tooth nerve area.

[0088] For example, the core can be designed by scanning a tooth model manufactured by directly taking an impression of a natural tooth with an extraoral scanner, and then designing and correcting the model using a CAD (Computer Aided Design) program.

[0089] Alternatively, the design can be made by scanning a tooth model manufactured using an intraoral scanner with an extraoral scanner, and then designing and correcting it using a CAD (Computer Aided Design) program.

[0090] Based on the designed design of the above core, it is formed by a process of laminating and curing a photocurable restorative composition.

[0091] The above curing can be accomplished by irradiating ultraviolet (UV) light, visible light, laser, etc., and preferably by irradiating ultraviolet (UV) light.

[0092] At this time, the step of forming the core may be characterized in that it is performed by layering and curing the photocurable restorative composition using a 3D printer.

[0093] When using a 3D printer, the photocurable restorative composition is preferably in the form of a slurry. Accordingly, the photocurable restorative composition can be prepared into a slurry of an appropriate viscosity by supplying moisture using distilled water, if necessary, and then injected into the slurry tube of the 3D printer for spraying.

[0094] The above 3D printer may use a DLP (Digital Light Processing), SLA (Stereolithography Apparatus), or SLS (Selective Laser Sintering) method, and preferably a Poly-Jet method that combines FDM (Fused Deposition Modeling) and DLP.

[0095] The DLP method is a method of creating a molded object by irradiating ultraviolet light with a beam projector onto a photocurable polymer in a liquid tank. Since the polymer is hardened by irradiating light, the printed molded object has low strength, but the working speed is fast and the surface of the molded object is smooth and precise.

[0096] The SLA method is similar to the DLP method, but the difference is that DLP uses ultraviolet light using a beam projector, whereas the SLA method uses laser light.

[0097] In addition, the SLS method is a method of obtaining a molded body by irradiating a powdered material with a laser to melt all or part of the powder particles and induce bonding between the particles.

[0098] Poly-Jet method is a printing method that sprays materials through a nozzle like FDM method and then solidifies them by irradiating them with ultraviolet light like DLP method. The printing materials used are mainly liquid or solid polymer printing materials, and have the advantage of being economical while ensuring high levels of precision and productivity.

[0099] The above heat treatment may be characterized in that it is performed by heating the core to 135°C to 145°C, preferably 137°C to 142°C, and then drying and cooling.

[0100] And, accordingly, a dental prosthesis having a hardness of 80 Hv to 90 Hv, preferably 83 Hv to 86 Hv, can be obtained.

[0101] The above heat treatment conditions correspond to conditions that can secure the core's own strength.

[0102]

[0103] Hereinafter, the present invention will be described in detail using manufacturing examples and experimental examples. However, the manufacturing examples according to the present invention may be modified in various different forms, and the scope of the present invention should not be construed as being limited to the manufacturing examples described below.

[0104]

[0105] [Manufacturing Example 1: Photocurable Composition Manufacturing Example]

[0106] 1. A ceramic composition was prepared including a silica mixture including 70 g of first silica particles having an average particle size of 0.3 μm and 30 g of second silica particles having an average particle size of 10 μm, 5 g of ZrO2 (zirconium oxide) having an average particle size of 0.13 μm, and 5 g of BaO (barium oxide).

[0107]

[0108] 2. A photoinitiator mixture containing the components in Table 1 below was prepared.

[0109] Urethane dimethacrylate (UDMA) 50g Triethylene glycol dimethacrylate (TEGDMA) 40g 2-hydroxyethyl methacrylate (HEMA) 10g Diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide (TPO) 0.3g Phenylbis (2,4,6-trimethylbenzoyl) phosphine oxide (BAPO) 0.1g Benzoyl peroxide (BPO) 0.5g

[0110]

[0111] 3. A silane solution containing the ingredients in Table 2 below was prepared.

[0112] Vinyltriethoxysilane 4g, alcohol 88.5g, distilled water 7.5g

[0113]

[0114] 4. 110 g of the ceramic composition of 1 above and 100 g of the silane solution of 3 above were placed in a zirconia pot, 100 g of alumina balls of 2 mm in size were placed together in the pot, and then mounted on a pre-mill, mixed at a speed of 250 rpm for 1 hour, placed in a vacuum dry oven, and vacuum-dried for 24 hours to obtain a ceramic composition treated (coated) with silane through the ceramic composition and the silane solution.

[0115] 5. 28.5 g of the photoinitiator mixture of 2 was added to 72.5 g of the silane-treated ceramic composition of 4 above, and mixing and defoaming were performed 10 times in total for 10 minutes each at a rotation speed of 1000 rpm and an orbital speed of 700 rpm in a high viscosity mixer, thereby preparing a photocurable restorative composition.

[0116]

[0117] [Manufacturing Example 2: Manufacturing Example of Dental Prosthesis]

[0118] After scanning the human teeth to manufacture the prosthesis, a model of the core was designed using CAD (Computer Aided Design).

[0119] Next, the photocurable restorative composition of Manufacturing Example 1 was placed in a slurry tube of a 3D printer, and the photocurable restorative composition was laminated using a 3D printer (Illumina), and cured by UV irradiation (at 405 nm for 30 seconds) to form a core.

[0120] The printed core was placed in a ceramic sintering furnace, heated to 140°C, dried, and cooled to obtain a sintered core.

[0121] The above sintered core was washed with tap water to obtain dental prostheses as shown in Figs. 2 to 4.

[0122]

[0123] [Comparative Example 1: Manufacturing Example of Dental Prosthesis]

[0124] Comparative Example 1 produced a dental prosthesis using the same method as Manufacturing Example 2, except that the temperature of heat applied to the core in Manufacturing Example 2 was set to 120°C.

[0125]

[0126] [Comparative Example 2: Manufacturing Example of Dental Prosthesis]

[0127] Comparative Example 2 produced a dental prosthesis using the same method as Manufacturing Example 2, except that the temperature of heat applied to the core in Manufacturing Example 2 was set to 130°C.

[0128]

[0129] [Comparative Example 3: Manufacturing of Dental Prosthetics]

[0130] Comparative Example 3 produced a dental prosthesis using the same method as Manufacturing Example 2, except that the temperature of heat applied to the core in Manufacturing Example 2 was set to 150°C.

[0131]

[0132] [Comparative Example 4: Manufacturing Example of Dental Prosthesis]

[0133] Comparative Example 3 produced a dental prosthesis using the same method as Manufacturing Example 2, except that the temperature of heat applied to the core in Manufacturing Example 2 was set to 160°C.

[0134]

[0135] [Comparative Example 5: Manufacturing Example of Dental Prosthesis]

[0136] Comparative Example 3 produced a dental prosthesis using the same method as Manufacturing Example 2, except that the temperature of heat applied to the core in Manufacturing Example 2 was set to 170°C.

[0137]

[0138] [Comparative Example 6: Manufacturing Example of Dental Prosthesis]

[0139] Comparative Example 3 produced a dental prosthesis using the same method as Manufacturing Example 2, except that the temperature of heat applied to the core in Manufacturing Example 2 was set to 180°C.

[0140]

[0141] [Experimental Example]

[0142] The strength of the above-mentioned manufactured dental prosthesis was measured through a Vickers Hardness Test, and the results are shown in Table 2 and Figure 1 below.

[0143]

[0144] Temperature gradient (Hv) Comparative example 1 120℃ 61.52 Comparative example 2 130℃ 76.77 Manufacturing example 2 140℃ 84.85 Comparative example 3 150℃ 66.74 Comparative example 4 160℃ 74.75 Comparative example 5 170℃ 65.70 Comparative example 6 180℃ 70

[0145]

[0146] As confirmed in Table 3 above, when the sintering temperature was 140°C, the best hardness of 84.85 Hv was observed.

Claims

1. A photocurable restorative composition comprising a mixture of a silane-treated ceramic composition and a photoinitiator in a weight ratio of 1:1 to 20:

1.

2. In paragraph 1, The above silane-treated ceramic composition comprises a silica mixture, ZrO 2, A ceramic composition comprising BaO and a silane solution is mixed to produce a ceramic composition. Photocurable restorative composition.

3. In paragraph 2, In the above ceramic composition, The above ZrO 2 is included in an amount of 1 to 20 parts by weight per 100 parts by weight of the silica mixture. Photocurable restorative composition.

4. In paragraph 2, In the above ceramic composition, The above BaO is included in an amount of 1 to 20 parts by weight per 100 parts by weight of the silica mixture. Photocurable restorative composition.

5. In paragraph 2, The above ceramic composition and the silane solution are mixed and dried at a weight ratio of 1:1 to 5:1 to produce the silane-treated ceramic composition. Photocurable restorative composition.

6. In paragraph 1, The above photoinitiator mixture comprises an acrylate monomer, a photoinitiator, and a thermal initiator. Photocurable restorative composition.

7. In paragraph 6, The photoinitiator is included in an amount of 0.1 to 4 parts by weight based on 100 parts by weight of the acrylate monomer. Photocurable restorative composition.

8. In paragraph 7, The above photoinitiator comprises TPO, and the TPO is contained in an amount of 0.1 to 3 parts by weight per 100 parts by weight of the acrylate monomer. Photocurable restorative composition.

9. In paragraph 7, The above photoinitiator comprises BAPO, and the BAPO is contained in an amount of 0.1 to 1 part by weight based on 100 parts by weight of the acrylate monomer. Photocurable restorative composition.

10. In paragraph 6, The above thermal initiator is included in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the acrylate monomer. Photocurable restorative composition.

11. Silica mixture, ZrO 2, A step of preparing a silane-treated ceramic composition by mixing and drying a silane solution into a ceramic composition including BaO; and A step of preparing a photocurable restorative composition by adding a photoinitiator mixture to the silane-treated ceramic composition at a weight ratio of 1:1 to 20:1; comprising; Method for producing a photocurable restorative composition.

12. A step of forming a core by laminating and curing a photocurable restorative composition manufactured by the manufacturing method of Article 11 using a 3D printer; and A step of performing heat treatment on the above core; comprising; Method for manufacturing dental prosthesis.

13. A dental prosthesis manufactured according to the method for manufacturing a dental prosthesis in Article 12.

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