公开(公告)号：US12213849B2

公开(公告)日：2025-02-04

申请号：US16357373

申请日：2019-03-19

Applicant: SHOFU INC.

Inventor： Rieko Aiba ,  Shuhei Takahashi ,  Toshio Kitamura

IPC: A61C13/00 ,  C04B35/486

Abstract: To provide a dental zirconia blank which has high permeability, can reproduce a color tone close to a natural tooth and a strength to be able to tolerate in oral cavity. Furthermore, to provide a dental zirconia blank from which a prosthesis device of 4 or more units having high strength can be prepared. To provide a dental zirconia blank having a plurality of layers, comprising; a first layer consisting of a high permeability ceramic containing 91.6 to 96.5 mol % of zirconium oxide and 3.5 to 8.4 mol % of yttrium oxide, and a second layer consisting of a low permeability ceramic containing 95.6 to 98.5 mol % of zirconium oxide and 1.5 to 4.4 mol % of yttrium oxide, wherein a content rate of yttrium oxide in the low permeability ceramic is lower than a content rate of yttrium oxide in the high permeability ceramic by 0.5 to 5.4 mol %, and the first layer is positioned at one end of the plurality of layers in a layering direction.

公开(公告)号：US12193897B2

公开(公告)日：2025-01-14

申请号：US16487129

申请日：2018-02-20

Applicant: SHOFU INC.

Inventor： Seiji Ban ,  Shuhei Takahashi ,  Toshio Kitamura ,  Rieko Aiba

IPC: A61C13/00 ,  A61C5/73 ,  C04B35/48 ,  C04B41/87

Abstract: To provide a zirconia perfect sintered body which has a chroma of an excellent color tone and excellent translucency as compared with a zirconia mill blank for dental cutting and machining prepared from a zirconia raw material powder containing various stabilizing materials while maintaining high strength, and does not cause deformation. The zirconia mill blank of the present invention is a semi-fired zirconia mill blank for dental cutting and machining containing a semi-fired body of a ceramic particle, the zirconia mill blank for dental cutting and machining contains zirconium oxide, a stabilizing material consisting of an oxide, and a water-soluble compound salt which contains at least one element selected from calcium, magnesium and a rare earth element and is not an oxide, the content of the stabilizing material in terms of the oxide in the semi-fired body of the ceramic particle is within a range of 2 to 7 mol %, and the content of the water-soluble compound salt in the zirconia mill blank for dental cutting and machining is within a range of 0.1 to 3.5 mol %.

公开(公告)号：US11737957B2

公开(公告)日：2023-08-29

申请号：US16117044

申请日：2018-08-30

Applicant: SHOFU INC.

Inventor： Toshiyuki Nakatsuka ,  Toshio Kitamura ,  Masanori Goto ,  Tomohiro Kai ,  Satoshi Takano ,  Yoshiyuki Jogetsu

IPC: A61K6/00 ,  A61C13/087 ,  C08K9/02 ,  C08L33/04 ,  A61K6/887 ,  A61K6/60 ,  A61K6/76

CPC classification number: A61K6/887 ,  A61C13/087 ,  A61K6/60 ,  A61K6/76 ,  C08K9/02 ,  A61K6/887 ,  C08L33/04

Abstract: A dental curable composition capable of use as a dental material that can substitute part or all of a natural tooth, in particular, a resin material for dental cutting and machining in the field of dental care. When a block shape usable as the resin material is produced, while mechanical properties and aesthetic properties required for a crown prosthetic appliance are maintained, the dental curable composition can be molded and processed with pressure and heating while strain generated in the block is reduced and no cracks and chipping occur. The dental curable composition includes (a) a polymerizable monomer and (b) a filler in a weight ratio of 10:90 to 70:30, and 0.01 to 10 parts by weight of (c) a polymerization initiator and 0.001 to 1 part by weight of (d) a chain transfer agent being a terpenoid compound based on 100 parts by weight of the polymerizable monomer (a).

公开(公告)号：US10945927B2

公开(公告)日：2021-03-16

申请号：US15981980

申请日：2018-05-17

Applicant: SHOFU INC.

Inventor： Toshio Kitamura ,  Masahiro Kazama

IPC: C09K3/00 ,  A61K6/838 ,  A61C13/20 ,  A61K6/807 ,  A61K6/827 ,  A61K6/871

Abstract: To provide a phosphate-based dental investment material which can used for metal and press ceramic and especially can impart the lubricity to the surface of a press ceramic, and a phosphate-based dental investment material which can be subjected to a flash heating for press ceramic, can obtain sufficient the hardening expansion, and can easily remove the investment material after press molding. A phosphate-based dental investment material of the present disclosure comprising a powder material and a liquid material, wherein the powder material contains (a) magnesium oxide: 5 to 20 wt. %; (b) ammonium dihydrogenphosphate: 8 to 25 wt. % and the liquid material contains (c) aqueous solution including a cation-treated colloidal silica.

公开(公告)号：US09180073B2

公开(公告)日：2015-11-10

申请号：US13762910

申请日：2013-02-08

Applicant: SHOFU INC.

Inventor： Shun Shimosoyama ,  Toshio Kitamura

IPC: A61K6/10

CPC classification number: A61K6/10 ,  C08L83/04 ,  C08L83/12

Abstract: Provided is a silicone impression material with high hydrophilicity that exhibits instantaneous hydrophilicity before being cured, that exhibits high hydrophilicity after being cured, that has preferable properties for a dental impression material, and that has good preservation stability. A sorbitan fatty acid ester based surfactant and a nonionic surfactant composed of polyether modified silicone are used in combination as a hydrophilizing agent not containing a siloxane polymer and a hydrophilizing agent containing a siloxane polymer, respectively.

Abstract translation: 本发明提供具有高亲水性的硅氧烷印模材料，其在固化前具有瞬时亲水性，在固化后表现出高的亲水性，对于牙印模材料具有优选的性能，并具有良好的保存稳定性。 作为不含硅氧烷聚合物的亲水剂和含有硅氧烷聚合物的亲水剂，组合使用脱水山梨醇脂肪酸酯系表面活性剂和由聚醚改性硅氧烷构成的非离子表面活性剂。