WO2021132861A1 - Procédé de fabrication d'une ébauche composite dentaire - Google Patents

Procédé de fabrication d'une ébauche composite dentaire Download PDF

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Publication number
WO2021132861A1
WO2021132861A1 PCT/KR2020/014300 KR2020014300W WO2021132861A1 WO 2021132861 A1 WO2021132861 A1 WO 2021132861A1 KR 2020014300 W KR2020014300 W KR 2020014300W WO 2021132861 A1 WO2021132861 A1 WO 2021132861A1
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Prior art keywords
composite blank
composition
composite
composition layer
blank
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PCT/KR2020/014300
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English (en)
Korean (ko)
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오명환
강종호
김윤기
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(주) 베리콤
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Publication of WO2021132861A1 publication Critical patent/WO2021132861A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0022—Blanks or green, unfinished dental restoration parts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/08—Artificial teeth; Making same
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/08—Artificial teeth; Making same
    • A61C13/082—Cosmetic aspects, e.g. inlays; Determination of the colour
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/08—Artificial teeth; Making same
    • A61C13/087—Artificial resin teeth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/08—Artificial teeth; Making same
    • A61C13/09—Composite teeth, e.g. front and back section; Multilayer teeth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/70—Preparations for dentistry comprising inorganic additives
    • A61K6/71—Fillers
    • A61K6/76—Fillers comprising silicon-containing compounds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/70—Preparations for dentistry comprising inorganic additives
    • A61K6/78—Pigments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
    • A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
    • A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Definitions

  • the present invention relates to a method for manufacturing a dental composite blank, and more particularly, to a method for manufacturing a dental composite blank having a color gradient similar to that of natural teeth in a composite paste and having improved mechanical properties.
  • Dental prosthetic materials used in dental prosthetic procedures can be used in a wide range of dental procedures such as dental fixation and aesthetic dental treatment, in addition to general dental procedures that restore the entire crown or restoration of damaged teeth caused by caries or fractures, etc. It is one of the key dental materials used throughout.
  • dental prostheses include restorations, supplements, inlays, onlays, veneers, full and partial crowns, bridges, implants, posts, etc. can be heard
  • the prosthesis is manufactured by hand by a dentist with specialized knowledge or by a technician who is a professional manufacturer who is skilled in a laboratory that can manufacture it.
  • CAD/CAM processing is possible for zirconia ceramic restorative materials, sintering time of 6 to 12 hours is required after milling.
  • CAD/CAM processing and a build-up method in which the powder of glass powder is raised is used.
  • the color is similar to the natural tooth using a natural tooth, it is manufactured by a skilled technician and requires a lot of time due to the heat treatment process, so patients need 2-3 visits to the hospital until complete treatment, which is a complicated revisit. causing discomfort to the patient.
  • Recent advances in dental CAD/CAM technology and processing technology place higher demands on related dental materials.
  • Hybrid ceramic is a resin for restoration, has good elasticity, and excellent machinability and wear resistance, making it a relatively ideal material for dental restoration.
  • the monochromatic hybrid ceramic is difficult to implement various color gradients according to the tooth tip, tooth surface, and gum side like natural teeth, so it lacks aesthetic effect, so a colored monomer is applied to the restoration surface to imitate natural teeth. Since it is not monolithic, it has the disadvantage of easy separation, fracture and wear during processing and use.
  • An object of the present invention is to solve the above problems, by pressing before curing of the laminate for a composite blank laminated with a plurality of composition layers, one composition layer penetrates into the inside of the other composition layer and has a color gradient to match natural teeth
  • An object of the present invention is to provide a method capable of manufacturing a dental composite blank having similar esthetics.
  • the dental composite blank manufactured by the manufacturing method of the present invention has the effect of improving the mechanical properties by making the inside of the composite blank more dense by curing while pressing.
  • the composition for the first composite blank having a first color and the composition for the second composite blank having a second color are respectively filled in a mold to form a first composite blank composition layer/second composite preparing a laminate including a composition layer for a blank; (b) applying pressure to the laminate filled in the mold to infiltrate some or all of the composition for the second composite blank of the second composition layer for the composite blank into the first composition layer for the composite blank to form a laminate having a color gradient manufacturing; and (c) preparing a composite blank having a color gradient by curing the laminate having the color gradient.
  • the viscosity of the second composition for a composite blank may be smaller than that of the first composition for a composite blank.
  • the second composition for a composite blank may have greater flowability than the composition for the first composite blank at 25° C. and 1 atm.
  • step (b) may be 5 to 300 MPa.
  • Step (b) may also be carried out at a temperature of 10 to 59°C.
  • step (b) may be performed for 10 minutes to 24 hours.
  • step (b) may be performed once or may be performed 2 to 10 times at the same or different pressures.
  • step (b) may be performed under an inert gas atmosphere.
  • the inert gas may include at least one selected from the group consisting of nitrogen, helium, neon, argon, and krypton.
  • step (a) comprises the steps of (a-1) filling a mold with a composition for a first composite blank having a first color to prepare a composition layer for a first composite blank; and (a-2) a composition for a first composite blank/a composition layer for a second composite blank by filling a second composition for a composite blank having a second color into the mold filled with the composition for a first composite blank layer It may include; manufacturing a sieve.
  • step (a) comprises the steps of (a-1') filling a mold with a composition for a second composite blank having a second color to prepare a composition layer for a second composite blank; and (a-2') a composition layer for a first composite blank / a composition layer for a second composite blank by filling the mold with a composition for a first composite blank having a first color and a second composition layer for a composite blank. It may include; manufacturing a laminate.
  • the color gradient of the laminate may be adjusted by adjusting the content ratio of the composition layer for the first composite blank and the composition layer for the second composite blank.
  • step (c) may be performed at a pressure of 5 to 300 MPa.
  • step (c) may be carried out at a temperature of 80 to 200 °C.
  • the color gradient may include some or all of the color gradient between the first color and the second color.
  • the composition for the first composite blank may include at least one first unsaturated double bond compound selected from the group consisting of a monomer containing an unsaturated double bond and an oligomer of a monomer containing an unsaturated double bond; a first filler; a first polymerization initiator; and a first dye
  • the composition for the second composite blank includes at least one second unsaturated double bond compound selected from the group consisting of a monomer containing an unsaturated double bond and an oligomer of a monomer containing an unsaturated double bond; a second polymerization initiator; and a second pigment.
  • composition for the second composite blank may further include a second filler.
  • composition for the second composite blank may include an amount of the pigment from more than 0 parts by weight to 5 parts by weight or less based on 100 parts by weight of the unsaturated double bond compound.
  • first unsaturated double bond compound or the second unsaturated double bond compound may be a methacrylate (MA)-based compound or an acrylate-based compound.
  • the first unsaturated double bond compound or the second unsaturated double bond compound is each independently 2,2-bis[4-(2-hydroxy-3-methacryloxypropoxy)phenyl]propane (Bis-GMA) , Ethylene glycol dimethacrylate (EGDMA), ethylene glycol diacrylate (EDGA), triethylene glycol dimethacrylate (TEGDMA), triethylene glycol diacrylate (TEGDA), ethoxylate bisphenol A dimethacrylate (Bis-EMA), urethane dimethacrylate (UDMA), polyurethane diacrylate (PUDA), dipentaerythritol pentaacrylate monophosphate (PENTA), 2-hydroxyethyl methacrylate ( 2-hydroxyethyl methacrylate, HEMA), polyalkenoic acid, biphenyl dimethacrylate (BPDM), biphenyl diacrylate BPDA, and glycerol phosphate dimethacrylate, GPDM) may include one or more selected
  • first filler or the second filler may each independently include one selected from the group consisting of an inorganic filler and an organic filler.
  • the inorganic filler is synthetic amorphous silica, crystalline silica, barium silicate, barium borosilicate, barium fluoroaluminoborosilicate ), barium aluminoborosilicate, strontium silicate, strontium borosilicate, MTA (Mineral Trioxide Aggregates), strontium aluminoborosilicate (strontium aluminoborosilicate), calcium silicate calcium silicate), aluminosilicate (alumino silicate), silicon nitrides, titanium dioxide (titanium dioxide), calcium hydroxy apatite (calcium hydroxy apatite), zirconia (zirconia), and bioactive glass (Bioactive glass) It may include one or more selected from the group.
  • the synthetic amorphous silica (Synthetic amorphous silica), crystalline silica (Crystalline silica) and zirconia may be in the form of particles, and the average diameter of the particles may be 0.01 to 0.5 ⁇ m.
  • barium silicate, barium borosilicate, barium fluoroaluminoborosilicate, barium aluminoborosilicate, strontium silicate, Strontium borosilicate, Mineral Trioxide Aggregates (MTA) and strontium aluminoborosilicate are in the form of particles, and the average diameter of the particles may be 0.1 to 3 ⁇ m.
  • first polymerization initiator or the second polymerization initiator may each independently include at least one selected from the group consisting of a photopolymerization initiator and a thermal polymerization initiator.
  • first dye or the second dye may each independently include at least one selected from the group consisting of iron III oxide and titanium dioxide (TiO 2 ).
  • the dental composite blank manufactured by the manufacturing method of the present invention may have excellent esthetic properties by creating a color gradient similar to that of natural teeth in the dental composite blank.
  • the manufacturing method of the present invention can provide a dental composite blank with improved mechanical properties by making the inside of the composite blank more dense by curing while pressing.
  • 1 is a flow chart showing a procedure for manufacturing a dental composite blank in which compositions having different colors are laminated.
  • Example 2 is a photograph of the bonding surface between the composition layers of the composite blank prepared according to Example 2 and Comparative Example 2.
  • first, second, etc. used below may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.
  • a certain component when it is said that a certain component is “formed” or “stacked” on another component, it may be formed or laminated by being directly attached to the front surface or one surface on the surface of the other component, but in the middle It should be understood that other components may be present in the .
  • the composition for the first composite blank having a first color and the composition for the second composite blank having a second color are respectively filled in a mold to form a first composite blank composition layer/second composite preparing a laminate including a composition layer for a blank; (b) applying pressure to the laminate filled in the mold to infiltrate some or all of the composition for the second composite blank of the second composition layer for the composite blank into the first composition layer for the composite blank to form a laminate having a color gradient manufacturing; and (c) preparing a composite blank having a color gradient by curing the laminate having the color gradient.
  • a composition for a first composite blank having a first color and a composition for a second composite blank having a second color are respectively filled in a mold for the first composite blank composition layer/second composite blank It may include the step of preparing a laminate including the composition layer.
  • step (a) comprises the steps (a-1) of preparing a composition layer for a first composite blank by filling a mold with a composition for a first composite blank having a first color; and filling the mold with a second composition for a composite blank having a second color into the mold filled with the composition layer for a first composite blank to prepare a laminate including a composition layer for a first composite blank/a composition layer for a second composite blank (a-2) may be included.
  • step (a) may include filling a mold with a composition for a second composite blank having a second color to prepare a composition layer for a second composite blank (a-1'); and filling the mold with a composition for a first composite blank having a first color into the mold filled with a composition layer for a second composite blank to prepare a laminate including a composition layer for a first composite blank/a composition layer for a second composite blank (a-2') may be included.
  • the viscosity of the second composition for a composite blank may be smaller than that of the first composition for a composite blank.
  • a composition with a lower viscosity may penetrate into a composition with a higher viscosity.
  • the second composition for a composite blank may have greater flowability than the composition for the first composite blank at 25° C. and 1 atm.
  • the color gradient of the laminate may be adjusted by adjusting the content ratio of the composition layer for the first composite blank and the composition layer for the second composite blank.
  • a content ratio of the first composition layer for a composite blank to the second composition layer for a composite blank may be 9.9:0.1 to 7:3, preferably 9:1 to 8:2.
  • the content ratio of the second composition layer for a composite blank is less than 9.9:0.1, the color gradient in the laminate appears insignificant, and when it exceeds 7:3, the composition for the second composite blank is the composition layer for the first composite blank. It is not economical because it takes a lot of time to penetrate into
  • the color gradient may include some or all of the color gradient between the first color and the second color.
  • composition for the first composite blank may include at least one first unsaturated double bond compound selected from the group consisting of a monomer containing an unsaturated double bond and an oligomer of a monomer containing an unsaturated double bond; a first filler; a first polymerization initiator; and a first pigment.
  • the composition for the first composite blank may include 200 parts by weight to 600 parts by weight of the first filler based on 100 parts by weight of the unsaturated double bond compound, and when less than 200 parts by weight, the viscosity of the composition for the first composite blank is lowered, so it is difficult to have a constant color gradient when penetrating the composition for the second composite blank, so the aesthetic effect may be reduced, and when it exceeds 600 parts by weight, the first filler of the composition for the first composite blank and the unsaturated double bond The compound is difficult to mix and the unsaturated double bond compound is difficult to form a polymer.
  • composition for the second composite blank may include at least one second unsaturated double bond compound selected from the group consisting of a monomer containing an unsaturated double bond and an oligomer of a monomer containing an unsaturated double bond; a second polymerization initiator; and a second pigment.
  • composition for the second composite blank may further include a second filler.
  • the composition for the second composite blank may include an amount of the dye from more than 0 parts by weight to 5 parts by weight or less based on 100 parts by weight of the unsaturated double bond compound, wherein in excess of 5 parts by weight, for the first composite blank Since the filler mixed in the composition for the second composite blank interferes with the penetration of the composition for the second composite blank into the composition layer, it is difficult to form a color gradient, which is not preferable because the aesthetic effect is reduced.
  • a methacrylate (MA)-based compound or an acrylate-based compound may be used alone or in combination of two or more.
  • the content of the unsaturated double bond compound may vary depending on the field and purpose of use, and may play an important role in the dispersion degree of the filler in the composite blank, and may be an important factor determining abrasion resistance and workability.
  • an inorganic filler or an organic filler may be used independently or in combination of two or more thereof.
  • the synthetic amorphous silica (Synthetic amorphous silica), crystalline silica (Crystalline silica) and zirconia may be in the form of particles, and the average diameter of the particles may be 0.01 to 0.5 ⁇ m.
  • barium silicate, barium borosilicate, barium fluoroaluminoborosilicate, barium aluminoborosilicate, strontium silicate, Strontium borosilicate, Mineral Trioxide Aggregates (MTA) and strontium aluminoborosilicate are in the form of particles, and the average diameter of the particles may be 0.1 to 3 ⁇ m.
  • a photopolymerization initiator or a thermal polymerization initiator may be used independently or in combination of two or more, preferably, a thermal polymerization initiator may be used.
  • the thermal polymerization initiator may be a peroxide type such as benzoyl peroxide.
  • the first or second composite blank composition may further include 0.01 to 5 parts by weight of the polymerization initiator, preferably 0.01 to 3 parts by weight, and more preferably 0.01 to 1 parts by weight.
  • the content of the polymerization initiator is less than 0.01 parts by weight, there is a problem that photopolymerization initiation does not occur, and if it exceeds 5 parts by weight, the effect is not increased depending on the content added, and it is not preferable because it may adversely affect the physical properties of the composition .
  • each independently iron III oxide or titanium dioxide (TiO 2 ) may be used alone or in combination of two or more.
  • iron oxide yellow iron oxide or red iron oxide may be used alone or in combination of two or more kinds.
  • step (b) Produce a laminate with a color gradient
  • a part or all of the composition for a second composite blank of the composition layer for the second composite blank is infiltrated into the first composition layer for a composite blank by applying pressure to the laminate filled in the mold to give a color It may include the step (b) of producing a laminate having a gradient.
  • the laminate filled in the mold is pressurized, and during the pressurization, the composition for the second composite blank penetrates into the composition layer for the first composite blank into the laminate during the pressurization. At this time, 90 to 100% of the amount of the second composite blank laminate injected into the mold penetrates into the first composite blank composition layer, so that a color gradient appears inside the final laminate.
  • the pressure of step (b) may be 5 to 300 MPa, wherein if it is less than 5 MPa, it is difficult for the composition for the second composite blank to penetrate into the inside of the composition layer for the first composite blank, and if it exceeds 300 MPa It is not desirable because it is not economical.
  • step (b) may be performed for 10 minutes to 24 hours, wherein when the time is less than 10 minutes, the penetration amount of the second composite blank composition layer is insignificant, and the amount of penetration of the first composite blank composition layer is insignificant, exceeding 24 hours. case is not economical.
  • step (b) may be performed once or may be performed 2 to 10 times at the same or different pressures.
  • step (b) may be performed once or may be performed 2 to 10 times at the same or different pressures.
  • more than 10 times the additional synergistic effect of the color gradient is insignificant, which is not preferable.
  • step (b) may be performed at a temperature of 10 to 59° C. in step (b).
  • the temperature is less than 10 °C, the flowability (fluidity) of the composition for the second composite blank decreases, so it is difficult for the composition for the second composite blank to penetrate into the inside of the composition layer for the second composite blank.
  • a composite paste in which only the paste and color are mixed is not preferable because it can be cured.
  • step (b) may be performed under an inert gas atmosphere, and nitrogen, helium, neon, argon, or krypton may be used alone or in combination of two or more as the inert gas.
  • the method for manufacturing a composite blank of the present invention may include the step (c) of preparing a composite blank having a color gradient by curing the laminate having the color gradient.
  • step (c) may be performed at a pressure of 5 to 300 MPa, where less than 5 MPa may cause cracks during curing, which may adversely affect strength, and is not economical if it exceeds 300 MPa, which is not preferable.
  • step (c) may be carried out at a temperature of 80 to 200 °C curing may proceed.
  • the inside was cut in the form of a rectangular prism with a height of 18 mm and a length of 17 mm x 17 mm from a nylon prism with a length of 15 mm X 15 mm and a height of 18 mm to prepare a mold in the form of a square pillar with a thickness of 1 mm and an empty inside.
  • the composite paste composition prepared according to Preparation Example 1 was filled in the mold and the composite paste composition prepared according to Preparation Example 2 was filled, and the thickness ratio of the paste composition layer of Preparation Example 1 and the paste composition layer of Preparation Example 2 was 8:2.
  • a laminate was obtained.
  • the mold filled with the laminate was fixed in a HIP (Hot Isostatic Pressing, hot isostatic pressure sintering) apparatus. After that, the temperature inside the HIP device was raised to 50° C. and pressurized with nitrogen at a pressure of 40 MPa.
  • HIP Hot Isostatic Pressing, hot isostatic pressure sintering
  • the temperature inside the HIP device was raised to 120° C., the pressure was maintained at 40 MPa, and the laminate was cured for 2 hours. After 2 hours, the pressure was gradually lowered to atmospheric pressure, and separated from the mold to prepare a dental composite blank.
  • a composite blank was prepared in the same manner as in Example 1, except for obtaining a laminate having a thickness ratio of the composition layer of 9:1 instead of obtaining a laminate having a thickness ratio of the composition layer of 8:2 in Example 1.
  • Example 1 the composite paste composition prepared according to Preparation Example 1 was filled in the mold and the composite paste composition prepared according to Preparation Example 2 was filled, and the thickness ratio of the paste composition layer of Preparation Example 1 and the paste composition layer of Preparation Example 2 Instead of obtaining a laminate of 8:2, the composite paste composition prepared according to Preparation Example 1 is filled in the mold, and the composite paste composition prepared according to Preparation Example 5 is filled to form the paste composition layer of Preparation Example 1 and Preparation Example 5 A composite blank was prepared in the same manner as in Example 1, except that a laminate having a thickness ratio of the paste composition layer of 8:2 was obtained.
  • Example 1 the composite paste composition prepared according to Preparation Example 1 was filled in the mold and the composite paste composition prepared according to Preparation Example 2 was filled, and the thickness ratio of the paste composition layer of Preparation Example 1 and the paste composition layer of Preparation Example 2 Instead of obtaining a laminate of 8:2, the composite paste composition prepared according to Preparation Example 3 is filled in the mold, and the composite paste composition prepared according to Preparation Example 4 is filled, the paste composition layer of Preparation Example 3 and Preparation Example 4 A composite blank was prepared in the same manner as in Example 1, except that a laminate having a thickness ratio of the paste composition layer of 8:2 was obtained.
  • Example 1 the composite paste composition prepared according to Preparation Example 1 was filled in the mold and the composite paste composition prepared according to Preparation Example 2 was filled, and the thickness ratio of the paste composition layer of Preparation Example 1 and the paste composition layer of Preparation Example 2 Instead of obtaining a laminate of 8:2, the composite paste composition prepared according to Preparation Example 3 is filled in the mold, and the composite paste composition prepared according to Preparation Example 4 is filled, the paste composition layer of Preparation Example 3 and Preparation Example 4 A composite blank was prepared in the same manner as in Example 1, except that a laminate having a thickness ratio of the paste composition layer of 9:1 was obtained.
  • Example 1 the composite paste composition prepared according to Preparation Example 1 was filled in the mold and the composite paste composition prepared according to Preparation Example 2 was filled, and the thickness ratio of the paste composition layer of Preparation Example 1 and the paste composition layer of Preparation Example 2 Instead of obtaining a laminate of 8:2, the composite paste composition prepared according to Preparation Example 3 was filled in the mold, and the composite paste composition prepared according to Preparation Example 5 was filled to form the paste composition layer of Preparation Example 3 and Preparation Example 5 A composite blank was prepared in the same manner as in Example 1, except that a laminate having a thickness ratio of the paste composition layer of 8:2 was obtained.
  • Test Example 1 Confirmation of color gradient inside dental composite blank and measurement of bending strength
  • the color gradient of the paste is determined after the pressing and curing process, when the composition for the second composite blank penetrates into the composition for the first composite blank, the color of the existing composition for the second composite blank is diffused into the composition for the first composite blank, resulting in a color change.
  • the color change of the composition for the first composite blank is large on the contact surface with the composition for the second composite blank, and the color change becomes small as it becomes farther away from the contact surface, so that a color gradient occurs inside the blank.
  • the surface of the cured dental composite blank was homogenized with abrasive paper No. 2000, and the color gradient was visually confirmed.
  • the degree of color gradient indicates the degree of color change inside the composition for the first composite blank as a percentage, and the overall color change of the composition for the first composite blank based on the contact surface of the composition for the first composite blank and the composition for the second composite blank If it occurs, it is indicated as 100% change, if only half color change occurs, it is indicated as 50% change.
  • the cured dental composite blank was processed to have a thickness of 1.2 mm ⁇ 0.2 mm, a width of 4.0 mm ⁇ 0.2 mm, and a length of 14 mm or more, and the surface was homogenized with abrasive paper No. 2000.
  • a three-point bending test was performed on the processed specimen under the conditions of a spanning distance of 12 mm and a crosshead speed of 1.0 mm/min.
  • Example 1 With internal color gradient 30% occurrence 255 MPa
  • Example 2 With internal color gradient 50% occurrence 265MPa
  • Example 3 With internal color gradient 25% occurrence 249MPa Comparative Example 1 No internal color gradient less than 1% 200 MPa Comparative Example 2 No internal color gradient less than 1% 205MPa Comparative Example 3 No internal color gradient less than 1% 203MPa
  • the dental composite blanks prepared according to Examples 1 to 3 had a color gradient in the range of 25 to 50%, but in Comparative Examples 1 to 3, the color gradient was not achieved at less than 1%.
  • the high filler content of the composite pastes of Examples 1 to 3 allows composite pastes with a low filler content to penetrate into the space between the filler and the monomer or between the fillers. The space that can penetrate between the filler and the monomer or between the fillers of the composite paste is not effective for color gradient.
  • the dental composite blank manufactured by the manufacturing method of the present invention may have excellent esthetic properties by creating a color gradient similar to that of natural teeth in the dental composite blank.
  • the manufacturing method of the present invention can provide a dental composite blank with improved mechanical properties by making the inside of the composite blank more dense by curing while pressing.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dentistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Plastic & Reconstructive Surgery (AREA)
  • Dental Preparations (AREA)
  • Dental Prosthetics (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'une ébauche composite. Le procédé de fabrication d'une ébauche composite comprend les étapes de : (a) remplissage d'un moule avec chacune d'une composition pour une première ébauche composite, ayant une première couleur, et une composition pour une seconde ébauche composite, ayant une seconde couleur, afin de fabriquer un stratifié comprenant une couche de composition pour une première ébauche composite/une couche de composition pour une seconde ébauche composite ; (b) application de pression au stratifié rempli dans le moule afin d'amener une partie ou toute la composition pour une seconde ébauche composite, de la couche de composition pour une seconde ébauche composite, afin de pénétrer la couche de composition pour une première ébauche composite, fabriquant ainsi un stratifié ayant un gradient de couleur ; et (c) durcissement du stratifié ayant un gradient de couleur afin de fabriquer une ébauche composite ayant un gradient de couleur, l'ébauche composite fabriquée par le procédé de fabrication d'une ébauche composite ayant un gradient de couleur.
PCT/KR2020/014300 2019-12-27 2020-10-20 Procédé de fabrication d'une ébauche composite dentaire WO2021132861A1 (fr)

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