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公开(公告)号：US11779447B2
公开(公告)日：2023-10-10
申请号：US17056665
申请日：2019-05-31
Applicant: TOKUYAMA DENTAL CORPORATION
Inventor： Hiroshi Morisaki , Naoto Shiohira
IPC: A61C19/10 , A61C13/087 , G09B23/28
CPC classification number: A61C19/10 , A61C13/087 , G09B23/283 , A61C2201/002
Abstract: [Object] To provide, for a composite resin (CR) having a wide range of applicable colors (shades) (wide-ranging color applicable CR), such as a CR having light diffusion properties and a CR that produces color by means of a structural color, a technology with which an excellent effect, specifically, an increased breadth (number) of applicable shades in comparison to an existing CR other than a wide-ranging color applicable CR, can be achieved.
[Solving Means] For example, in a demonstration instrument, a plurality of samples is prepared, a single wide-ranging color applicable CR has been used to restore a cavity in artificial teeth each having a different shade, the cavity being formed at a predetermined position of the artificial teeth, and the plurality of samples is disposed side by side and fixed on a display surface of a display plate, thereby making it possible to compare/contrast conditions of restored portions of the samples to each other and the color tone applicability thereof to those of a teeth to be restored.-
公开(公告)号：US20230165759A1
公开(公告)日：2023-06-01
申请号：US17927466
申请日：2021-04-28
Applicant: TOKUYAMA DENTAL CORPORATION
Inventor： Hiroshi Morisaki , Hironobu Akizumi
Abstract: Provided is a dental curable composition containing: (A) a porous organic-inorganic composite filler which comprises an organic resin component obtained by polymerizing a polymerizable monomer component (a) including at least 50 mass % of a polymerizable monomer having a hydrogen-bonding functional group, and an inorganic component composed of a plurality of inorganic particles; (B) a polymerizable monomer component including at least 10 mass % of a polymerizable monomer having a hydrogen-bonding functional group; and (C) a polymerization initiator, wherein (C) the polymerization initiator comprises, as photopolymerization initiators, (c1) a photosensitizer compound, (c2) a reducing agent, and (c3) a photoacid generator composed of an aryliodonium salt compound, and the content of the aryliodonium salt compound is 0.1-5 parts by mass with respect to 100 parts by mass of the total mass of (B) the polymerizable monomer component.
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公开(公告)号：US11058608B2
公开(公告)日：2021-07-13
申请号：US16605617
申请日：2018-04-16
Applicant: TOKUYAMA DENTAL CORPORATION
Inventor： Hiroshi Morisaki , Hironobu Akizumi
IPC: A61K6/887 , A61K6/76 , A61K6/17 , C08F122/20 , C08F122/22 , C08K3/34 , C08K7/18
Abstract: Provided is a method for producing a dental curable composition, the method includes mixing a polymerizable monomer (A); a spherical filler (B) having an average primary particle diameter within a range of 230 nm to 290 nm; a spherical filler (C) having an average primary particle diameter within a range of 100 nm to 500 nm, the spherical filler having an average primary particle diameter different from that of the spherical filler (B); and a polymerization initiator (D), in which 90% or more in number of the individual particles constituting the spherical filler (B) and the spherical filler (C) are present in a range of ±5% from the average primary particle diameter, and the refractive indices of the spherical filler (B) and the spherical filler (C) are larger than the refractive index of a polymer of a polymerizable monomer (A).
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Patent Agency Ranking
公开(公告)号：US20250101205A1
公开(公告)日：2025-03-27
申请号：US18728369
申请日：2022-12-13
Applicant: TOKUYAMA DENTAL CORPORATION
Inventor： Naoyuki Oya , Hiroshi Morisaki , Hironobu Akizumi
Abstract: Provided is a method for producing composite oxide particles consisting of spherical particles having a predetermined average primary particle diameter within a range of 230 to 350 nm, wherein 90% or more of a total number of the spherical particles have primary particle diameters within a range of the predetermined average primary particle diameter plus or minus 5%, each particle constituting the spherical particles is a core-shell particle comprising a silica-based composite oxide particle and a silica layer that coats a surface of the silica-based composite oxide particle, and the silica layer has an average thickness of 3 to 15 nm, and a production method thereof. Additionally, a curable composition comprising such composite oxide particles is provided.
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公开(公告)号：US11453761B2
公开(公告)日：2022-09-27
申请号：US17273225
申请日：2019-08-29
Applicant: TOKUYAMA DENTAL CORPORATION
Inventor： Takuma Matsuo , Hiroshi Morisaki , Hironobu Akizumi
IPC: C08K7/18 , A61K6/887 , A61K6/831 , A61K6/76 , A61K6/16 , A61K6/17 , C08F222/10 , C08F2/44 , C08F2/50 , C08K3/36
Abstract: Provided is a composite material which comprises a resin matrix and inorganic particles dispersed therein, wherein the inorganic particles comprise: one or more groups (G-PID) of spherical particles uniform in particle diameter which comprise aggregates of inorganic spherical particles having a specific average primary-particle diameter, have a narrow particle-size-distribution width, and have a lower refractive index than the resin matrix; and a group (G-SFP) of ultrafine particles. The inorganic spherical particles which constitute all the groups of spherical particles uniform in particle diameter contained in the resin matrix have an arrangement structure which is a short-range order structure satisfying a specific requirement. Also provided are a curable composition giving the composite material and a method for producing the curable composition.
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公开(公告)号：US20230039514A1
公开(公告)日：2023-02-09
申请号：US17788253
申请日：2020-11-26
Applicant: TOKUYAMA DENTAL CORPORATION
Inventor： Hiroshi Morisaki , Tatsuya Yamazaki , Takuma Matsuo , Hironobu Akizumi
Abstract: Provided is a curable composition that is for dentistry and that contains: a polymerizable monomer (A); an inorganic filler (B) having an average particle size of 0.1-1 μm; an organic-inorganic composite filler (C) having an aggregate structure in which inorganic primary particles having an average particle size of 10-1000 nm are bonded together through a resin layer covering the surface of the particles, to form a void having a specific pore volume; and a polymerization initiator (D). In the organic-inorganic composite filler (C), a curved surface-shaped organic-inorganic composite filler (C1) formed of organic-inorganic composite aggregate particles having a curved surface shape, and an amorphous organic-inorganic composite filler (C2) formed of amorphous organic-inorganic composite aggregate particles having an edge portion, are mixed such that C1/(C1+C2) equals 0.2-0.8 in terms of the number of particles having a particle size of 5 μm or more.
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公开(公告)号：US20230045524A1
公开(公告)日：2023-02-09
申请号：US17787823
申请日：2020-11-27
Applicant: TOKUYAMA DENTAL CORPORATION
Inventor： Hironobu Akizumi , Hiroshi Morisaki , Takuma Matsuo
Abstract: Provided is a dental filling and repairing material kit that is for repairing a tooth having a cavity and that includes a first polymerization curable composition (A) for forming a surface exposed layer exposed to a surface after repairing and a second polymerization curable composition (B) for forming a foundation layer to serve as a foundation of the surface exposed layer. The first polymerization curable composition (A) is formed into a cured body that expresses a structure color by dispersion of inorganic spherical particles in a specific dispersion state in a matrix. Regarding the second polymerization curable composition (B), the brightness (V) of colored light when a sample of said composition with a thickness of 1 mm is measured by using a color difference meter under a black background, is not less than 5 in terms of a color measurement value in the Munsell color system.
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公开(公告)号：US20210324178A1
公开(公告)日：2021-10-21
申请号：US17273225
申请日：2019-08-29
Applicant: TOKUYAMA DENTAL CORPORATION
Inventor： Takuma Matsuo , Hiroshi Morisaki , Hironobu Akizumi
IPC: C08K7/18 , A61K6/16 , A61K6/76 , A61K6/17 , A61K6/831 , A61K6/887 , C08K3/36 , C08F2/44 , C08F2/50 , C08F222/10
Abstract: Provided is a composite material which comprises a resin matrix and inorganic particles dispersed therein, wherein the inorganic particles comprise: one or more groups (G-PID) of spherical particles uniform in particle diameter which comprise aggregates of inorganic spherical particles having a specific average primary-particle diameter, have a narrow particle-size-distribution width, and have a lower refractive index than the resin matrix; and a group (G-SFP) of ultrafine particles. The inorganic spherical particles which constitute all the groups of spherical particles uniform in particle diameter contained in the resin matrix have an arrangement structure which is a short-range order structure satisfying a specific requirement. Also provided are a curable composition giving the composite material and a method for producing the curable composition.
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