Method for manufacturing dental resin block and dental resin block

Abstract

Embodiments provide a method for manufacturing a dental resin block and a dental resin block, the method comprising the steps of: preparing a block composition comprising a base resin, an inorganic filler, and a monomer; mixing the block composition; press-molding the mixed block composition; and curing the press-molded block composition under a first wavelength band of 395 nm to 550 nm and a second wavelength band of 200 nm to 393 nm.

Description

Method for manufacturing dental resin blocks and dental resin blocks

[0001] This specification relates to a method for manufacturing a dental resin block and a dental resin block.

[0002] Currently, digital restorations based on CAD / CAM technology have become a major advancement in oral restorative medicine. A wide range of oral restorations can now be fabricated digitally.

[0003] Ceramic materials are the most widely used materials in CAD / CAM technology due to their excellent mechanical, optical, and biocompatibility properties. However, ceramic materials are brittle and prone to self-cracking, causing significant wear on cutting heads. Their high hardness can also cause severe wear on teeth.

[0004] Resin materials occupy a significant share of CAD / CAM machining due to their low cost, excellent toughness, ease of machining and cutting, short restoration cycles, and minimal wear on teeth. However, resin materials cannot be used as permanent restorative materials due to their low strength, low wear resistance, and short service life.

[0005] Although resin ceramic restorative materials have the high strength characteristics of ceramic materials and the excellent toughness of resin materials, they have the following two problems. (1) Resin ceramic restorative materials inherit the biocompatibility of ceramic materials to a certain extent, but the high strength of ceramic materials makes teeth prone to wear, brittleness and insulation, etc., and although the mechanical properties have been greatly improved compared to resin materials, the mechanical performance of resin ceramic composites in actual dental restoration cannot reach a completely satisfactory level. (2) The high water absorption of resin ceramic restorative materials reduces the mechanical properties of the material, causes microleakage, reduces the thermal stability of the material, causes precipitation of unreacted monomers in the material, and even causes hydrolysis of polymer segments, ultimately shortening the service life of the material.

[0006] This specification relates to a method for manufacturing a dental resin block and a dental resin block.

[0007] A method for manufacturing a dental resin block according to one aspect of the present invention may include: preparing a block composition including a base resin, an inorganic filler, and a monomer; mixing the block composition; press-molding the mixed block composition; and curing the press-molded block composition under a first wavelength band of 395 nm to 550 nm and a second wavelength band of 200 nm to 393 nm.

[0008] One embodiment of the present invention may include the steps of: preparing a block composition including a base resin, an inorganic filler, and a monomer; mixing the block composition; pressurizing and molding the mixed block composition; and curing the pressurized block composition under a first wavelength band of 397 nm to 500 nm and a second wavelength band of 220 nm to 390 nm. Here, the step of preparing the block composition including the base resin, the inorganic filler, and the monomer may include a step of singly dispersing each of the base resin, the inorganic filler, and the monomer under conditions of 1,000 rpm to 5,000 rpm for 1 minute to 30 minutes, and the step of mixing the block composition may be performed under mixing conditions of 100 rpm to 600 rpm for 1 hour to 48 hours.

[0009] The above monomers include high-viscosity monomers and low-viscosity monomers having different viscosities, and the step of mixing the block composition is to sequentially introduce the high-viscosity monomers and low-viscosity monomers into the mixing means, and the dynamic viscosity of the high-viscosity monomer at 25°C is 3,000 cPs or more and 30,000 cPs or less, and the low-viscosity monomer may include a first low-viscosity monomer having a dynamic viscosity at 25°C of 1 cPs or more and 500 cPs or less and a second low-viscosity monomer having a dynamic viscosity at 25°C of 600 cPs or more and 2,500 cPs or less.

[0010] One embodiment of the present invention provides a dental resin block manufactured by the above-described manufacturing method.

[0011] The method for manufacturing a dental resin block according to one embodiment of the present invention is easy to implement colors, so that a customized color matching the original color of a patient's teeth can be implemented.

[0012] Figure 1 shows the colors of resin blocks according to Examples 1 to 5.

[0013] Hereinafter, the specification will be described in detail.

[0014] One embodiment of the present invention provides a method for manufacturing a dental resin block comprising the following steps:

[0015] A step of preparing a block composition comprising a base resin, an inorganic filler and a monomer;

[0016] A step of mixing the above block composition;

[0017] A step of pressurizing and molding the above mixed block composition; and

[0018] A step of curing the pressure-molded block composition under a first wavelength band of 395 nm to 550 nm and a second wavelength band of 200 nm to 393 nm.

[0019]

[0020] Dental resin blocks manufactured using conventional manufacturing methods had problems such as low mechanical strength and easy discoloration.

[0021] The present inventors developed a method for manufacturing a dental resin block that can solve the above-described problem and completed the present invention.

[0022] According to one embodiment of the present invention, a method for manufacturing a dental resin block includes a block composition as a raw material for manufacturing, which includes a base resin, an inorganic filler, and a monomer, thereby improving mechanical rigidity due to the inorganic filler and enhancing mechanical rigidity according to the curing characteristics of the monomer. In addition, by including a step of curing the pressure-molded block composition under a first wavelength band of 395 nm to 550 nm and a second wavelength band of 200 nm to 393 nm, the curing characteristics are maintained constant even when various materials are included, thereby solving problems such as discoloration.

[0023] A method for manufacturing a dental resin block according to one embodiment of the present invention comprises the step of preparing a block composition comprising a base resin, an inorganic filler, and a monomer. The base resin, inorganic filler, and monomer may each be manufactured through separate manufacturing processes, or may be prepared by obtaining known products.

[0024] A method for manufacturing a dental resin block according to one embodiment of the present invention includes a step of mixing a block composition. This step is a step of dispersing each composition with each other. The manufacturing method includes a step of individually dispersing each of a base resin, an inorganic filler, and a monomer (hereinafter, a pre-dispersion step) prior to the step of mixing the block composition (hereinafter, the main mixing step). By performing the pre-dispersion step in advance, each material is evenly mixed in the main mixing step, and there is an effect of improving mixing efficiency.

[0025] A method for manufacturing a dental resin block according to one embodiment of the present invention includes a step of pressurizing and molding the mixed block composition. This step is a step of molding the block composition so that it has a desired shape.

[0026] A method for manufacturing a dental resin block according to one embodiment of the present invention includes a step of curing the pressure-molded block composition under a first wavelength band of 395 nm to 550 nm and a second wavelength band of 200 nm to 393 nm. This step is a step of applying an electron beam to induce a crosslinking reaction of the block composition.

[0027] In one embodiment of the present invention, the step of curing the pressure-molded block composition is performed under a first wavelength range of 395 nm to 550 nm and a second wavelength range of 200 nm to 393 nm. By improving the curing properties of the monomers included in the composition under the above wavelength conditions, the quality of the final product can be improved. The step of performing the curing under the first and second wavelength ranges may mean irradiating the first and second wavelength ranges simultaneously using light sources having different wavelengths. At this time, the light source may be a halogen lamp, a high-pressure mercury lamp, or the like.

[0028] In one embodiment of the present invention, the first wavelength may be 397 nm to 500 nm, preferably 400 nm to 420 nm. Under the above conditions, a monomer having a sensitivity wavelength longer than ultraviolet light can be sufficiently cured.

[0029] In one embodiment of the present invention, the second wavelength may be 220 nm to 390 nm, preferably 250 nm to 387 nm. Under the above conditions, a monomer whose sensitivity wavelength corresponds to ultraviolet rays can be sufficiently cured.

[0030]

[0031] In one embodiment of the present invention, the difference between the first and second wavelengths may be 1 nm to 300 nm. Preferably, it may be 5 nm to 150 nm or 5 nm to 50 nm. Under the above conditions, only some monomers are not cured and uniform curing characteristics can be exhibited.

[0032] In one embodiment of the present invention, the step of curing the pressure-molded block composition may be performed for 5 to 24 hours. Preferably, the curing may be performed for 8 to 15 hours or 10 to 13 hours. Under the above conditions, sufficient curing is achieved, thereby improving the quality of the finished product and preventing damage to the product.

[0033] In one embodiment of the present invention, the step of curing the pressure-molded block composition can be performed while the block composition is injected into a mold.

[0034] In one embodiment of the present invention, the step of preparing a block composition comprising the base resin, inorganic filler, and monomer may include a step of individually dispersing the base resin, inorganic filler, and monomer in independent systems. In this case, the effect of evenly mixing each component in the step of mixing the block composition described below is achieved. The independent system means that each material does not come into contact with other materials while being dispersed. For example, the base resin, inorganic filler, and monomer may be dispersed in separate containers.

[0035] In one embodiment of the present invention, the step of individually dispersing each of the base resin, inorganic filler, and monomer may be performed at a speed of 1,000 rpm to 5,000 rpm for 1 to 30 minutes. Preferably, the step may be performed at a speed of 1,300 rpm to 3,000 rpm for 3 to 20 minutes, or at a speed of 1,700 rpm to 2,600 rpm for 4 to 10 minutes. Within the above numerical ranges, each material may be sufficiently dispersed.

[0036] In one embodiment of the present invention, the monomers include high-viscosity monomers and low-viscosity monomers having different viscosities, and the step of mixing the block composition may be to sequentially input the high-viscosity monomers and low-viscosity monomers through a mixing means. Since the monomers include high-viscosity monomers and low-viscosity monomers having different viscosities, the mechanical rigidity and storage stability due to the high-viscosity monomers may be improved, and the processability and adhesiveness due to the low-viscosity monomers may be improved. The step of mixing the block composition may be to sequentially input the high-viscosity monomers and low-viscosity monomers through a mixing means.

[0037] In one embodiment of the present invention, the time difference between the injection points of the high-viscosity monomer and the low-viscosity monomer may be 1 second to 10 minutes. Preferably, the time difference may be 10 seconds to 5 minutes or 30 seconds to 3 minutes. Under the above conditions, the high-viscosity monomer can be excellently mixed with the low-viscosity monomer, thereby improving processability.

[0038] In one embodiment of the present invention, dynamic viscosity can be measured and calculated by methods known in the art. For example, it can be measured using a flow meter and calculated as dynamic viscosity using Newton's equation.

[0039] In one embodiment of the present invention, the dynamic viscosity of the high-viscosity monomer at 25°C may be 3,000 cPs or more, and the dynamic viscosity of the low-viscosity monomer at 25°C may be 2,500 cPs or less. Within the above numerical range, the mechanical strength and storage stability due to the high-viscosity monomer may be improved, and the processability and adhesiveness due to the low-viscosity monomer may be further improved.

[0040] The reason for limiting the viscosity range and the order of addition of high-viscosity and low-viscosity monomers is to achieve uniform curing and further enhance the physical properties of the high-viscosity and low-viscosity monomers themselves, since the flow characteristics and curing characteristics of the high-viscosity and low-viscosity monomers are completely different.

[0041]

[0042] In one embodiment of the present invention, the dynamic viscosity of the high viscosity monomer at 25°C may be 3,000 cPs or more and 30,000 cPs or less, or 3,500 cPs or more and 15,000 cPs or less. Within the above numerical range, the mechanical strength and storage stability due to the high viscosity monomer may be improved.

[0043] In one embodiment of the present invention, the dynamic viscosity of the low-viscosity monomer at 25°C may be 1 cPs or more and 2,500 cPs or less. Within the above numerical range, the processability and adhesiveness due to the low-viscosity monomer may be further improved.

[0044] In one embodiment of the present invention, the low viscosity monomer may include a first low viscosity monomer having a dynamic viscosity at 25°C of 1 cPs or more and 500 cPs or less and a second low viscosity monomer having a dynamic viscosity at 25°C of 600 cPs or more and 2,500 cPs or less.

[0045] In one embodiment of the present invention, the dynamic viscosity of the first low viscosity monomer at 25°C may be 2 cPs or more and 100 cPs or less, or 3 cPs or more and 50 cPs or less.

[0046] In one embodiment of the present invention, the dynamic viscosity of the second low viscosity monomer at 25°C may be 650 cPs or more and 1,500 cPs or less, or 700 cPs or more and 1,200 cPs or less.

[0047] In one embodiment of the present invention, the step of mixing the block composition may be performed under mixing conditions of 100 rpm to 600 rpm for 1 to 48 hours. Preferably, it may be performed under mixing conditions of 120 rpm to 500 rpm for 6 to 36 hours or under mixing conditions of 150 rpm to 390 rpm for 12 to 30 hours. Under the above conditions, the raw materials are sufficiently mixed, thereby preventing the occurrence of a dead zone within the mixing vessel and improving processability. The dispersion conditions (rpm, time) of the pre-dispersion step are performed under completely different conditions from the dispersion conditions (rpm, time) of the main mixing step.

[0048] In one embodiment of the present invention, the step of pressurizing and molding the mixed block composition may include a step of starting from a starting temperature of 25°C to 35°C and increasing the temperature at a temperature increasing rate of 2°C / hr to 12°C / hr to a final temperature of 100°C to 130°C. Under the above conditions, the physical properties of the material are maintained and the raw material can be prevented from being thermally damaged.

[0049] In one embodiment of the present invention, the starting temperature may be 28°C to 33°C or 29°C to 31°C. Under the above conditions, the material can be prevented from being thermally damaged before the pressurizing process.

[0050] In one embodiment of the present invention, the final temperature may be 125°C to 130°C or 128°C to 130°C. Under the above conditions, the material can be sufficiently formed and the material can be prevented from being thermally damaged.

[0051] In one embodiment of the present invention, the heating temperature may be 4°C / hr to 11°C / hr or 6°C / hr to 10°C / hr. Under the above conditions, the physical properties of the material are maintained and the raw material can be prevented from being thermally damaged.

[0052] In one embodiment of the present invention, the step of pressurizing and molding the mixed block composition may be performed under a pressure of 5 mPa to 50 mPa for 5 to 48 hours. Preferably, the step may be performed under a pressure of 20 mPa to 40 mPa for 8 to 24 hours or under a pressure of 25 mPa to 35 mPa for 10 to 15 hours. Within the above numerical range, the physical properties of the material are maintained, and the raw material can be prevented from being thermally damaged.

[0053] In one embodiment of the present invention, the base resin may include a polyaryletherketone resin. The polyaryletherketone may include an aryl group, an ether group, and a ketone group as its unit structure. In this case, the polyaryletherketone may have a linear polymer structure in which the aryl group is bonded through an ether group and a ketone group. The aryl group may be a phenyl group.

[0054] In one embodiment of the present invention, the glass transition temperature of the base resin may be 120°C to 200°C. Preferably, it may be 130°C to 180°C or 140°C to 150°C. Within the above numerical range, resistance to harsh environments during high-temperature processing may be improved.

[0055] In one embodiment of the present invention, the melting point of the base resin may be 300°C to 500°C. Preferably, it may be 320°C to 450°C or 330°C to 400°C. Within the above numerical range, resistance to harsh environments during high-temperature processing may be improved, thereby improving heat resistance.

[0056] In one embodiment of the present invention, the polyaryl ether ketone may be polyether ketone (PEK), polyether ether ketone (PEEK), polyether ketone ketone (PEKK), polyether ketone ether ketone ketone (PEKEKK), or a combination thereof. Preferably, it may be polyether ether ketone (PEEK).

[0057] In one embodiment of the present invention, the average diameter (D50) of the inorganic filler may be 0.1 μm to 50 μm. Preferably, it may be 0.2 μm to 30 μm or 0.5 μm to 20 μm. Within the above numerical range, compatibility with other materials may be improved.

[0058] In one embodiment of the present invention, the inorganic filler may include silica, aluminum silicate, alumina, calcium fluoride, strontium fluoride, calcium carbonate, kaolin, clay, mica, aluminum sulfate, calcium sulfate, barium sulfate, titanium oxide, calcium phosphate, hydroxyapatite, calcium hydroxide, strontium hydroxide, zeolite, titanium dioxide, zirconia, or a combination thereof.

[0059] In one embodiment of the present invention, the inorganic filler may include an inorganic glass filler. The inorganic glass filler has excellent aesthetics due to its low light transmittance, and has excellent compatibility with the inorganic filler or base resin.

[0060] In one embodiment of the present invention, the refractive index of the inorganic glass filler may be 1.5 to 1.6. Preferably, it may be 1.52 to 1.58 or 1.54 to 1.56. Within the above numerical range, the inorganic filler exhibits excellent aesthetic effects.

[0061] In one embodiment of the present invention, the inorganic glass filler may be fluorine glass, borosilicate glass, soda glass, barium glass, barium aluminosilicate glass, strontium-containing glass, zirconium-containing glass, glass ceramic, fluoroaluminosilicate glass, etc.

[0062] In one embodiment of the present invention, the monomer may be a methyl methacrylate monomer.

[0063] In one embodiment of the present invention, the monomer is 2,2-bis-(4-(2-hydroxy-3methacryloyloxypropoxy)phenyl)propane (Bisphenol A glycerolate dimethacrylate: Bis-GMA), ethylene glycol dimethacrylate (EGDMA), triethylene glycol dimethacrylate (TEGDMA), ethoxylated bisphenol A dimethacrylate (Bisphenol A ethoxylate diacrylate: Bis-EMA), urethane dimethacrylate (UDMA), dipentaerythritol pentaacrylate monophosphate (PENTA), 2-hydrozyethyl methacrylate (HEMA), polyalkenoic acid, biphenyl dimethacrylate dimethacrylate (BPDM), glycerol phosphate dimethacrylate (GPDM), or mixtures thereof.

[0064] In one embodiment of the present invention, the high viscosity monomer may include 2,2-bis-(4-(2-hydroxy-3methacryloyloxypropoxy)phenyl)propane (Bisphenol A glycerolate dimethacrylate: Bis-GMA), urethane dimethacrylate (UDMA), etc.

[0065] In one embodiment of the present invention, the low viscosity monomer may include ethoxylated bisphenol A dimethacrylate (Bis-EMA), triethylene glycol dimethacrylate (TEGDMA), etc.

[0066] In one embodiment of the present invention, the content of the monomer may be 100 parts by weight to 1,000 parts by weight based on 100 parts by weight of the base resin. Preferably, it may be 300 parts by weight to 800 parts by weight or 400 parts by weight to 600 parts by weight. Within the above numerical range, the miscibility between the monomer and the base resin may be improved, and the curing efficiency may be enhanced.

[0067] In one embodiment of the present invention, the content of the inorganic filler may be 1,000 parts by weight to 2,000 parts by weight based on 100 parts by weight of the base resin. Preferably, it may be 1,200 parts by weight to 1,900 parts by weight or 1,400 parts by weight to 1,800 parts by weight. Within the above numerical range, the miscibility between the monomer and the base resin may be improved, and the curing efficiency may be enhanced.

[0068] In one embodiment of the present invention, the inorganic filler includes an inorganic glass filler, and the content of the inorganic glass filler may be 80 parts by weight or more and 98 parts by weight or less, based on 100 parts by weight of the total inorganic filler. Preferably, it may be 85 parts by weight or more and 96 parts by weight or less, or 90 parts by weight or more and 95 parts by weight or less. Within the above numerical range, the aesthetic appeal due to the inorganic glass filler can be excellently maintained.

[0069] In one embodiment of the present invention, the block composition may include a photoinitiator, a polymerization retardant, a pigment, or a combination thereof.

[0070] In one embodiment of the present invention, the photoinitiator may include 1-hydroxy-cyclohexyl-phenyl-ketone, diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO), Irgacure 819, Irgacure 2959, Omnirad 500, thioxanthone (TX), a thioxanthone derivative, benzophenone (BPO), a benzophenone derivative, or a combination thereof.

[0071] In one embodiment of the present invention, the content of the photoinitiator may be 5 to 30 parts by weight based on 100 parts by weight of the base resin. Preferably, it may be 10 to 28 parts by weight or 15 to 25 parts by weight. Within the above numerical range, the photocuring speed may be improved.

[0072] In one embodiment of the present invention, the polymerization retardant may include butylated hydroxytoluene (BHT), tribenzylamine (TBA), or a combination thereof.

[0073] In one embodiment of the present invention, the pigment may include a red pigment, a yellow pigment, a black pigment, or a combination thereof.

[0074] In one embodiment of the present invention, the red pigment may be red iron oxide.

[0075] In one embodiment of the present invention, the yellow pigment may be yellow iron oxide, yellow bismuth, yellow vanadium-zirconium, yellow cerium-praseodymium, or a combination thereof.

[0076] In one embodiment of the present invention, the black pigment may be black iron oxide.

[0077] In one embodiment of the present invention, the content of the pigment may be 0.01 to 5 parts by weight based on 100 parts by weight of the base resin. Preferably, it may be 0.05 to 3 parts by weight or 0.1 to 1 part by weight. Within the above numerical range, excellent coloring effects are achieved.

[0078] A method for manufacturing a dental resin block according to one embodiment of the present invention may include a step of removing and obtaining a cured block composition from a mold.

[0079] One embodiment of the present invention provides a dental resin block manufactured by the above-described manufacturing method.

[0080] In one embodiment of the present invention, the dental resin block may have a shape selected from the group consisting of a rectangular parallelepiped, a cube, a cylinder, and a sphere.

[0081] Hereinafter, the present invention will be described in more detail through examples.

[0082]

[0083] <Manufacturing Example>

[0084] Materials A to F below were prepared.

[0085] Base resin (A)

[0086] a1: polyether ether ketone (PEEK), cas no: 29658-26-2

[0087] Weapon Filler (B)

[0088] b1: Barium aluminosiliacate (BaAl2O4), D50: 0.5~20㎛, Cas no: 12004-04-5

[0089] b2: Silica (silicon dioxide: SiO2), D50: 5~20㎛, Cas no: 68611-44-9

[0090] b3: Titanium Dioxide (TiO2), Cas no: 13463-67-7

[0091] Monomer (C)

[0092] c1: Bisphenol A glycerolate dimethacrylate (Bis-GMA), pH: 6.2~7.9, viscosity (@25℃): 4,000~8,000 cPs, Cas no: 1565-94-2

[0093] c2: Bisphenol A ethoxylate diacrylate (Bis-EMA), pH: 6.3~7.5, viscosity (@25℃): 700~1,200 cPs, Cas no: 64401-02-1

[0094] c3: Triethylene glycol dimethacrylate (TEGDMA), viscosity (@25℃): 5~15 cPs, Cas no: 109-16-0

[0095] c4: Urethane dimethacrylate (UDMA), viscosity (@25℃) 5.900~11,900 cPs, Cas no: 934705-15-4

[0096] Photoinitiator (D)

[0097] d1: Benzoyl peroxide (BPO), CAS no: 94-36-0

[0098] d2: Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO), cas no: 75980-60-8

[0099] polymerization retardant (E)

[0100] e1: Butylated hydroxytoluene (BHT), cas no: 128-37-0

[0101] pigment (F)

[0102] f1: Iron oxide red (IOR), cas no: 1314-13-2

[0103] f2: Iron oxide yellow (IOY), cas no: 15201-61-3

[0104] f3: Iron oxide black (IOB), cas no: 1317-61-9

[0105] <Example 1>

[0106] The base resin, inorganic filler, and monomer were prepared according to the composition ratios shown in Table 1 below. Each material was mixed well in an independent system at a speed of 2,500 rpm for 5 minutes.

[0107] Afterwards, each material was placed into the mixing equipment and mixed at a speed of 250 rpm for 24 hours. At this time, high-viscosity monomers and low-viscosity monomers were sequentially placed into the mixing equipment.

[0108] The mixed composition was placed in a pressurized molding device, and the temperature was increased from a starting temperature of 30°C to a final temperature of 129°C at an increment of approximately 8°C. At this time, the pressurizing pressure was maintained at 25 to 35 mpa, and the process was performed at the final temperature for 12 hours.

[0109] The pressure-molded block composition was simultaneously cured under a first wavelength band of 405 nm and a second wavelength band of 385 nm.

[0110] The cured block composition was separated from the mold to obtain the final product.

[0111] Classification Example 1 Example 2 Example 3 Example 4 Example 5 Base resin (A) a 1 4.4 4.5 4.5 4.5 4.5 Inorganic filler (B) b 1 67.98 167.98 167.97 667.96 7.96 b 2 5 5 5 5 5 b 3 0.00 9 0.00 8 0.00 8 0.00 8 0.00 8 Monomer (C) c 1 3.5 3.5 3.5 3.5 3.5 c 2 5 10 6 5 5 5 5 c 3 6 6 6 6 c 4 6.5 6.5 6.5 6.5 6.5 Photoinitiator (D) d 10.6 50.70.70.70.7d20.350.30.30.30.3Polymerization retardant (E)e10.50.50.50.50.5Pigment (F)f10.0050.0030.0050.0090.01f20.0030.0070.010.0150.021f30.00030.0010.0010.0010.001

[0112] The surface color photographs of the manufactured resin blocks of Examples 1 to 5 are shown in Fig. 1. From the left, they are resin blocks corresponding to Example 1 (B1), Example 2 (A1), Example 3 (A2), Example 4 (A3), and Example 5 (A3.5). The five resin blocks each have colors corresponding to the same white series, but the color of the resin block A3.5 shown on the far right corresponds to the color with the darkest brightness (beige color) among the five white series, and the resin block B1 shown on the far left corresponds to the lightest color (light ivory color). The colors of the resin blocks gradually become darker as they move from resin block B1 to resin block A3.5. At this time, it was confirmed that according to the manufacturing method of the dental resin block of the present invention, the composition ratio can be adjusted to express a color difference in a fine range. According to such a resin block, a customized color matching the original color of a patient's teeth can be implemented.

[0113]

[0114] The method for manufacturing a dental resin block according to the embodiments of the present application can realize a customized color that matches the original color of a patient's teeth, and thus is expected to have high industrial applicability in the dental field.

Claims

1. A step of preparing a block composition including a base resin, an inorganic filler and a monomer; A step of mixing the above block composition; A step of pressurizing and molding the above mixed block composition; and A method for manufacturing a dental resin block, comprising the step of curing the pressure-molded block composition under a first wavelength band of 395 nm to 550 nm and a second wavelength band of 200 nm to 393 nm.

2. In claim 1, A method for manufacturing a dental resin block, wherein the step of curing the pressure-molded block composition is performed for 5 to 24 hours.

3. In claim 1, A method for manufacturing a dental resin block, wherein the step of preparing a block composition including the base resin, inorganic filler and monomer includes a step of dispersing each of the base resin, inorganic filler and monomer individually in an independent system.

4. In claim 3, A method for manufacturing a dental resin block, wherein the step of individually dispersing each of the base resin, inorganic filler, and monomer is performed for 1 to 30 minutes under conditions of 1,000 rpm to 5,000 rpm.

5. In claim 1, The above monomers include high viscosity monomers and low viscosity monomers having different viscosities, A method for manufacturing a dental resin block, wherein the step of mixing the above block composition is to sequentially introduce a high-viscosity monomer and a low-viscosity monomer into a mixing means.

6. In claim 5, A method for manufacturing a dental resin block, wherein the dynamic viscosity of the high-viscosity monomer at 25°C is 3,000 cPs or more, and the dynamic viscosity of the low-viscosity monomer at 25°C is 2,500 cPs or less.

7. In claim 1, A method for manufacturing a dental resin block, wherein the step of mixing the above block composition is performed for 1 to 48 hours under mixing conditions of 100 to 600 rpm.

8. In claim 1, A method for manufacturing a dental resin block, wherein the step of pressurizing and molding the above-mentioned mixed block composition includes a step of starting from a starting temperature of 25°C to 35°C and heating at a heating rate of 2°C / hour to 12°C / hour to a final temperature of 100°C to 130°C.

9. In claim 1, A method for manufacturing a dental resin block, wherein the step of pressurizing and molding the above mixed block composition is performed under a pressure of 5 mPa to 50 mPa for 5 to 48 hours.

10. In claim 1, A method for manufacturing a dental resin block, wherein the base resin comprises a polyaryletherketone resin.

11. In claim 1, A method for manufacturing a dental resin block, wherein the average diameter (D50) of the above-mentioned inorganic filler is 0.1㎛ to 50㎛.

12. In claim 1, A method for manufacturing a dental resin block, wherein the inorganic filler comprises silica, aluminum silicate, alumina, calcium fluoride, strontium fluoride, calcium carbonate, kaolin, clay, mica, aluminum sulfate, calcium sulfate, barium sulfate, titanium oxide, calcium phosphate, hydroxyapatite, calcium hydroxide, strontium hydroxide, zeolite, titanium dioxide, zirconia, or a combination thereof.

13. In claim 1, A method for manufacturing a dental resin block, wherein the above inorganic filler includes an inorganic glass filler.

14. In claim 1, A method for manufacturing a dental resin block, wherein the content of the monomer is 100 to 1,000 parts by weight based on 100 parts by weight of the base resin.

15. A dental resin block manufactured by a manufacturing method according to any one of claims 1 to 14.

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