公开(公告)号：US20170151041A1

公开(公告)日：2017-06-01

申请号：US15362867

申请日：2016-11-29

Applicant: SHOFU INC.

Inventor： Masanori GOTO ,  Toshio KITAMURA ,  Mitsuji TERAMAE

IPC: A61C13/00 ,  A61C13/09 ,  A61C13/08

CPC classification number: A61C13/0022 ,  A61C5/10 ,  A61C5/30 ,  A61C13/082 ,  A61C13/087 ,  A61C13/09

Abstract: To provide a multilayer resin material for dental milling and machining, comprising an inorganic filler in a content of 40% by weight or more and a plurality of layers different in transparency and color tone from each other, wherein the thickness of the uppermost layer (U) and the thickness of the lowermost layer (L) are each 1 mm or more, the contrast ratios (uppermost layer: CU, lowermost layer: CL) as indices for the transparency of the uppermost layer (U) and the transparency of the lowermost layer (L) satisfy the following relations: 0.30≦CU≦0.60 0.55≦CL≦0.90 CU

公开(公告)号：US20190388196A1

公开(公告)日：2019-12-26

申请号：US16367459

申请日：2019-03-28

Applicant: SHOFU INC.

Inventor： Toshio KITAMURA ,  Shuhei TAKAHASHI

IPC: A61C13/00 ,  A61C13/08 ,  C04B35/48 ,  C04B41/00 ,  C04B41/46 ,  C04B41/49

Abstract: To provide a liquid material which can only adjust transparency by applying on a part of a zirconia crown having high transparency, without coloring.The present disclosure provides an opaque imparting liquid used for a prosthesis device cut and machined from a dental zirconia for cutting and machining, comprising; (a) 10 to 39 wt. % of a water-soluble aluminum compound and/or a water-soluble lanthanum compound, (b) 60 to 89 wt. % of water, and (c) 1 to 20 wt. % of an organic solvent.

公开(公告)号：US20230255734A1

公开(公告)日：2023-08-17

申请号：US18136575

申请日：2023-04-19

Applicant: SHOFU INC.

Inventor： Toshio KITAMURA ,  Rieko AIBA

IPC: A61C13/00 ,  A61C13/08

CPC classification number: A61C13/0022 ,  A61C13/0004 ,  A61C13/082

Abstract: The present disclosure relates to a dental cutting zirconia blank having high relative density for preparing a dental restoration. More specifically, the present disclosure relates to a dental cutting zirconia blank which consists of a zirconia ceramics used for the cutting with the CAD/CAM system in the dental field, a semi-sinter zirconia blank (pre-sintered body) of which has high relative density, and which can provide a prosthesis device having high aesthetics after sintering. There is provided a dental cutting zirconia blank wherein the dental cutting zirconia blank has at least one layer consisting of zirconia powder containing 4 to 15 mol % of yttria or erbium oxide as a stabilizer, a relationship among pre-sintering density, final-sintering density and relative density satisfies the following relation:


54≤Relative density (%)={(Pre-sintering density)/(Perfect-sintering density)}×100≤70

公开(公告)号：US20190380815A1

公开(公告)日：2019-12-19

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：US20180369076A1

公开(公告)日：2018-12-27

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: A61K6/083 ,  A61K6/00 ,  A61C13/087 ,  C08K9/02 ,  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：US20240315816A1

公开(公告)日：2024-09-26

申请号：US18680250

申请日：2024-05-31

Applicant: SHOFU INC.

Inventor： Seiji BAN ,  Shuhei TAKAHASHI ,  Toshio KITAMURA ,  Rieko AIBA

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

CPC classification number: A61C13/0022 ,  A61C5/73 ,  C04B35/48 ,  C04B41/87 ,  C04B2235/3246 ,  C04B2235/94 ,  Y10T428/12229

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：US20190192257A1

公开(公告)日：2019-06-27

申请号：US16145463

申请日：2018-09-28

Applicant: SHOFU INC.

Inventor： Mamoru HOSOKAWA ,  Toshio KITAMURA

IPC: A61C5/77 ,  A61K6/08 ,  A61C13/087 ,  A61C13/08 ,  A61K6/00

CPC classification number: A61C5/77 ,  A61C13/0004 ,  A61C13/0022 ,  A61C13/082 ,  A61C13/087 ,  A61K6/0073 ,  A61K6/08

Abstract: To provide a resin cured body for dental cutting processing used for cutting and machining using a dental CAD/CAM system, wherein the resin cured body consists of the cured body of a composition comprising: (a) an inorganic filler containing 55 wt. % or more of an element belonging to group II and/or group XIII of the periodic table in terms of an oxide, (b) a polymerizable monomer, and (c) a polymerization initiator.

公开(公告)号：US20180333337A1

公开(公告)日：2018-11-22

申请号：US15981980

申请日：2018-05-17

Applicant: SHOFU INC.

Inventor： Toshio KITAMURA ,  Masahiro KAZAMA

IPC: A61K6/033 ,  A61K6/02

CPC classification number: A61K6/033 ,  A61C13/20 ,  A61K6/0215 ,  A61K6/0662

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：US20180125616A1

公开(公告)日：2018-05-10

申请号：US15805396

申请日：2017-11-07

Applicant: SHOFU INC.

Inventor： Toshio KITAMURA ,  Rieko AIBA

IPC: A61C13/00 ,  A61C13/08

CPC classification number: A61C13/0022 ,  A61C13/0004 ,  A61C13/082

Abstract: The present disclosure relates to a dental cutting zirconia blank having high relative density for preparing a dental restoration. More specifically, the present disclosure relates to a dental cutting zirconia blank which consists of a zirconia ceramics used for the cutting with the CAD/CAM system in the dental field, a semi-sinter zirconia blank (pre-sintered body) of which has high relative density, and which can provide a prosthesis device having high aesthetics after sintering. There is provided a dental cutting zirconia blank wherein the dental cutting zirconia blank has at least one layer consisting of zirconia powder containing 4 to 15 mol % of yttria or erbium oxide as a stabilizer, a relationship among pre-sintering density, final-sintering density and relative density satisfies the following relation: 54≤Relative density (%)={(Pre-sintering density)/(Perfect-sintering density)}×100≤70

公开(公告)号：US20160000660A1

公开(公告)日：2016-01-07

申请号：US14737763

申请日：2015-06-12

Applicant: SHOFU INC.

Inventor： Toshiyuki NAKATSUKA ,  Toshio KITAMURA ,  Masanori GOTO ,  Tomohiro KAI ,  Satoshi TAKANO ,  Yoshiyuki JOGETSU

IPC: A61K6/083 ,  A61K6/00 ,  A61C13/087 ,  C08K9/02

CPC classification number: A61K6/083 ,  A61C13/087 ,  A61K6/0047 ,  A61K6/0088 ,  C08K9/02 ,  C08L33/04

Abstract: The present invention relates to a dental curable composition that can be suitably used 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. An object of the present invention is to provide a dental curable composition in which, when a block shape usable as a resin material for dental cutting and machining is produced while mechanical properties such as hardness, bending strength and compressive strength as well as aesthetic property 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. There is provided a dental curable composition including (a) a polymerizable monomer and (b) a filler in a weight ratio of 10:90 to 70:30, and including 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).

Abstract translation: 本发明涉及一种牙科用固化性组合物，其可以适合用作牙科用材料，该牙科用材料可以代替部分或全部天然牙齿，特别是用于牙科护理领域的牙科切割和机械加工用树脂材料。 本发明的目的是提供一种牙科用固化性组合物，其中，当可以用作用于牙科切削和机械加工的树脂材料的块形状时，产生硬度，弯曲强度和抗压强度等机械性能以及所需的美观性 为了维持冠假体器具，可以通过压力和加热来模制和加工牙科用固化性组合物，同时在块中产生的应变降低，并且不会发生裂纹和碎裂。 提供了一种牙科用固化性组合物，其包含（a）可聚合单体和（b）重量比为10:90至70:30的填料，并且包含0.01至10重量份的（c）聚合引发剂和0.001 至（d）基于100重量份的可聚合单体（a）的链转移剂为萜类化合物。