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公开(公告)号：US20240366348A1
公开(公告)日：2024-11-07
申请号：US18285805
申请日：2022-05-13
Applicant: TOKUYAMA DENTAL CORPORATION
Inventor： Yusaku SHINAGAWA , Ayumu GYAKUSHI , Tatsuya YAMAZAKI
Abstract: Provided are a denture base material package capable of improving operation efficiency while securing quality, without being influenced by an operator's skill level, in the production of a denture by a production method for a denture involving using a reference denture, and a production method for a denture involving using the same. A denture base material package includes: a string-shaped molded body obtained by molding a photocurable denture base material having plastic deformability into a string shape; and a light-shielding member having an internal space kept airtight, and accommodating the string-shaped molded body in the internal space. The light-shielding member includes (i) a tray having a groove for accommodating the string-shaped molded body, and (ii) at least one kind of member selected from the group consisting of: a bag body configured to house the tray thereinside; and a lid member configured to seal an opening of the groove.
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公开(公告)号：US12102494B2
公开(公告)日：2024-10-01
申请号：US17613419
申请日：2020-05-13
Applicant: TOKUYAMA DENTAL CORPORATION
Inventor： Takuma Matsuo , Anna Soshi , Yuukou Nagasawa , Hironobu Akizumi
CPC classification number: A61C13/0022 , A61K6/17 , A61K6/79
Abstract: Provided are a blank for dental cutting having a part to be cut made from a resin material, wherein the resin material includes a composite material in which inorganic particles are dispersed in a resin matrix, the inorganic particles are made from aggregates of inorganic spherical particles having a specific average primary particle diameter, have a narrow particle size distribution, and include one or a plurality of spherical particle groups of the same particle diameter (G-PID) having a refractive index smaller than that of the resin matrix and an ultrafine particle group (G-SFP), and the arrangement structure of all of the inorganic spherical particles constituting the spherical particle groups of the same particle diameter in the resin matrix has a short-range ordered structure that fulfills specific conditions, and a method for producing the same.
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公开(公告)号：US20240180788A1
公开(公告)日：2024-06-06
申请号：US18550553
申请日：2022-02-28
Applicant: TOKUYAMA DENTAL CORPORATION
Inventor： Hideaki MIYAKE , Moeno TAGO , Hironobu AKIZUMI , Ryuta KIRA , Naoto NOMURA
Abstract: The photocationically curable composition of the present invention contains a cationically polymerizable monomer (a), a photo acid generator (b), a photosensitizer (c), and a thiophene compound (d). The present invention can provide a photocationically curable composition that can be rapidly cured at room temperature, can provide a cured material having high color tone stability, and is relatively resistant to gelation.
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公开(公告)号：US20240000670A1
公开(公告)日：2024-01-04
申请号：US18252802
申请日：2021-10-22
Applicant: TOKUYAMA DENTAL CORPORATION
Inventor： Hiroshi Hara , Akari Hashimoto , Kei Nakashima
IPC: A61K6/818 , A61C13/00 , A61C13/083 , A61K6/822
CPC classification number: A61K6/818 , A61C13/0006 , A61C13/083 , A61K6/822
Abstract: Provided are a zirconia dental mill blank and a manufacturing method therefor, said mill bank having a to-be-cut part composed of a composite material, which includes fine particles of an inorganic oxide (excluding zirconium oxide, an inorganic oxide functioning as a stabilizer, and aluminum oxide) and a matrix composed of a temporarily sintered body of a crystalline zirconium oxide powder containing a stabilizer and an aluminum oxide additive, wherein the temporarily sintered body is a microporous temporarily sintered body having a relative density of 45-65% and having pores opened outward, and the fine particles of the inorganic oxide are held in the pores of the microporous temporarily sintered body. Moreover, provided are a method for manufacturing a dental zirconia ceramic prosthesis, and a method for manufacturing an article composed of a zirconia composite ceramic.
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公开(公告)号：US11857385B2
公开(公告)日：2024-01-02
申请号：US17758562
申请日：2021-02-26
Applicant: Tokuyama Dental Corporation
Inventor： Akiko Iwasaki , Tatsuya Yamazaki , Takeshi Suzuki
CPC classification number: A61C13/0013 , A61C13/01 , A61C13/10 , B29C64/124 , B33Y10/00 , B33Y80/00 , C09J7/10 , C09J7/30 , C09J2301/416 , C09J2433/00 , C09J2433/008
Abstract: [Object] To provide a method of producing a plate denture using a stereolithography 3D printer, which is capable of producing a plate denture in a short time with a more simplified production process, the plate denture exhibiting excellent occlusion.
[Solving Means] The problem is solved by a method of producing a plate denture, including: adhering an artificial tooth and a denture base photochemically solidified by a stereolithography 3D printer to each other by polymerizing an unpolymerized curable composition for stereolithography present on a surface of the denture base. Further, stronger adhesion between the artificial tooth and the denture base is achieved by mixing, in the curable composition for stereolithography, a polymerization initiator other than a photopolymerization initiator for stereolithography.-
Patent Agency Ranking
公开(公告)号：US20230320940A1
公开(公告)日：2023-10-12
申请号：US18010594
申请日：2021-07-26
Applicant: TOKUYAMA DENTAL CORPORATION
Inventor： Hideaki MIYAKE , Hironobu AKIZUMI , Ryuta KIRA
CPC classification number: A61K6/61 , A61K6/891 , C08G59/72 , C08G59/68 , C08G59/687 , C08G59/685
Abstract: To prevent gelling even during storage for a long time period under high temperature or room temperature, and to achieve rapid curing under a room-temperature condition at the time of photoirradiation, provided are a photocationically curable composition containing a cationically polymerizable monomer and photoacid generators, and being substantially free of a hydrogen ion scavenger, wherein the photoacid generators include: at least one kind of photoacid generator selected from a photoacid generator formed of an ion pair whose anion is a noncoordinating anion, and a photoacid generator formed of a zwitterionic compound whose anionic moiety is a noncoordinating anionic moiety; and at least one kind of photoacid generator selected from a photoacid generator formed of an ion pair whose anion is not a noncoordinating anion and a photoacid generator formed of a zwitterionic compound whose anionic moiety is not a noncoordinating anionic moiety, and a dental curable composition using the same.
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公开(公告)号：US20230137898A1
公开(公告)日：2023-05-04
申请号：US17758562
申请日：2021-02-26
Applicant: Tokuyama Dental Corporation
Inventor： Akiko IWASAKI , Tatsuya YAMAZAKI , Takeshi SUZUKI
Abstract: To provide a method of producing a plate denture using a stereolithography 3D printer, which is capable of producing a plate denture in a short time with a more simplified production process, the plate denture exhibiting excellent occlusion. [Solving Means] The problem is solved by a method of producing a plate denture, including: adhering an artificial tooth and a denture base photochemically solidified by a stereolithography 3D printer to each other by polymerizing an unpolymerized curable composition for stereolithography present on a surface of the denture base. Further, stronger adhesion between the artificial tooth and the denture base is achieved by mixing, in the curable composition for stereolithography, a polymerization initiator other than a photopolymerization initiator for stereolithography.
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公开(公告)号：US11452675B2
公开(公告)日：2022-09-27
申请号：US16647045
申请日：2018-09-14
Applicant: Tokuyama Dental Corporation
Inventor： Junichiro Yamagawa , Akiyoshi Mori , Yuko Nagasawa , Takuya Suzuki , Yohei Seya
Abstract: A dental curable composition which comprises a radically polymerizable monomer component (A), a polymerizing catalyst (B) and an inorganic granular material (C), characterized in that:
the radically polymerizable monomer component (A) contains a bifunctional monomer (A-1) represented by the following formula (α), RP—SP1—RP (α) where, RP is a radically polymerizable group represented by CH2═C(R)—COO— or CH2═C(R)—CONH—, wherein R is a hydrogen atom or a hydrocarbon group having 1 to 3 carbon atoms, and SP1 is a hydrocarbon group having 5 to 15 carbon atoms, and the content of the bifunctional monomer (A-1) in the radically polymerizable monomer component (A) is 5 to 40% by mass under a condition that the content of a diluting monomer (A-2) represented by the following formula (β), RP—SP2—RP (β) where, RP is as defined in the above formula (α), and SP2 is an aliphatic hydrocarbon group different from SP1, an oxygen-containing aliphatic hydrocarbon group having not less than 2 oxygen atoms, or an oxygen-containing aromatic hydrocarbon group having not less than 3 oxygen atoms, is zero or not more than 10% by mass.-
公开(公告)号：US20220218450A1
公开(公告)日：2022-07-14
申请号：US17613419
申请日：2020-05-13
Applicant: TOKUYAMA DENTAL CORPORATION
Inventor： Takuma Matsuo , Anna Soshi , Yuukou Nagasawa , Hironobu Akizumi
Abstract: Provided are a blank for dental cutting having a part to be cut made from a resin material, wherein the resin material includes a composite material in which inorganic particles are dispersed in a resin matrix, the inorganic particles are made from aggregates of inorganic spherical particles having a specific average primary particle diameter, have a narrow particle size distribution, and include one or a plurality of spherical particle groups of the same particle diameter (G-PID) having a refractive index smaller than that of the resin matrix and an ultrafine particle group (G-SFP), and the arrangement structure of all of the inorganic spherical particles constituting the spherical particle groups of the same particle diameter in the resin matrix has a short-range ordered structure that fulfills specific conditions, and a method for producing the same.
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公开(公告)号：US20210244519A1
公开(公告)日：2021-08-12
申请号：US17273624
申请日：2019-08-21
Applicant: Tokuyama Dental Corporation
Inventor： Masaki KINOSHITA , Tatsuya YAMAZAKI
Abstract: [Object] To provide a photocurable composition capable of reducing the amount of surface-unpolymerized-products of an obtained cured body and achieving a high photocuring depth, and to provide, particularly, a photocurable composition that can be suitably used in a photocuring-type denture reline material.
[Solving Means] A photocurable composition includes: a polymerizable monomer such as 2-methacryloxyethyl propionate and 1,9-nonamethylene methacrylate; resin particles such as spherical poly(ethyl methacrylate) particles; an α-diketone compound such as camphorquinone; a tertiary amine compound such as ethyl p-dimethylaminobenzoate; and an α-hydroxycarboxylic acid having an acid dissociation constant of 3.0 or more in water (at 25° C.) and two or more carbonyl groups in the same molecule, such as malic acid.
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