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：US20240400739A1

公开(公告)日：2024-12-05

申请号：US18594341

申请日：2024-03-04

Applicant: SHOFU INC.

Inventor： Takahiro FUKAMI ,  Keita KAWATA

IPC: C08F222/22 ,  A61C13/00

Abstract: [Problem]
It has been difficult to prepare a mill blank for dental cutting and machining in a state of no cracks or breaks.
[Solution]
To provide a curable composition for use in a mill blank for dental cutting and machining, comprising 14 to 36% by mass of (A) bifunctional urethane methacrylate monomer represented by Formula 1, 2 to 12% by mass of (B) bifunctional methacrylate monomer not containing a urethane group, 60 to 80% by mass of (C) inorganic filler, 0.1 to 0.5% by mass of (D) thermal polymerization initiator, and 0.1 to 0.5% % by mass of (E) chain transfer agent.

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：US20240252292A1

公开(公告)日：2024-08-01

申请号：US18234611

申请日：2023-08-16

Applicant: SHOFU INC.

Inventor： Shuhei TAKAHASHI ,  Satoshi FUJIWARA ,  Munehira TAKENAKA

IPC: A61C13/00

CPC classification number: A61C13/0022 ,  A61C2201/00

Abstract: To provide a ceramic mill blank for dental cutting and machining in which cracks or chips are not caused on the outer edge of the ceramic mill blank even if attaching to and detaching from a dental milling machine are repeated and it is possible to machine the vicinity of the outer edge of the ceramic mill blank.
To provide a ceramic mill blank for dental cutting and machining, wherein, the ceramic mill blank for dental cutting and machining comprises a ceramic portion to be cut and machined and one or more seal members, the ceramic portion consists of a ceramic material which is not finally sintered, the ceramic portion has an outer peripheral surface which is engageable with a holding tool, the one or more seal members are provided on the outer peripheral surface of the ceramic portion, and a length of the one or more seal members is 50% or more of a length in a circumferential direction of the outer peripheral surface provided with the one or more seal members.

公开(公告)号：US20240164868A1

公开(公告)日：2024-05-23

申请号：US18423978

申请日：2024-01-26

Applicant: SHOFU INC.

Inventor： Kazumichi NONAKA ,  Shuhei TAKAHASHI

IPC: A61C1/08 ,  A61C3/02 ,  B22F3/04 ,  C04B35/622 ,  C04B38/00

CPC classification number: A61C1/08 ,  A61C3/02 ,  B22F3/04 ,  C04B35/622 ,  C04B38/0074 ,  B22F2003/242

Abstract: To provide a zirconia mill blank for dental cutting and machining which has excellent machinability in a thin workpiece such as an inlay, an onlay and a veneer, and may impart high strength and high translucency to a zirconia perfect sintered body without a special sintering such as HIP treatment, and a preparing method thereof.
The zirconia mill blank for dental cutting and machining has a porosity within a range of 15 to 30%.

公开(公告)号：US11767411B2

公开(公告)日：2023-09-26

申请号：US17032284

申请日：2020-09-25

Applicant: SHOFU INC.

Inventor： Daisuke Hara ,  Kenzo Yamamoto ,  Yasuhiro Nishino ,  Kazuya Shinno

IPC: C08F2/46 ,  C08F2/50 ,  C08G61/04 ,  C08K5/00 ,  C08K3/11 ,  C08F220/12 ,  C08K3/16 ,  C08K3/22 ,  C08K3/30 ,  C08K3/36 ,  C08K3/40 ,  C08K5/1575 ,  C08K9/02 ,  C08K9/06 ,  C08L33/12

CPC classification number: C08K5/0091 ,  C08F220/12 ,  C08K3/11 ,  C08K3/16 ,  C08K3/22 ,  C08K3/30 ,  C08K3/36 ,  C08K3/40 ,  C08K5/1575 ,  C08K9/02 ,  C08K9/06 ,  C08L33/12 ,  C08K2003/2227 ,  C08K2003/2244 ,  C08K2003/3045

Abstract: To provide a dental curable composition having excellent curability and storage stability. The dental curable composition contains (a) transition metal adsorbent in which a transition metal compound of the period 4 in the periodic table is adsorbed on an inorganic particle which is non-reactive with a transition metal of the period 4 in the periodic table, (b) thiourea derivative, (c) organic peroxide having a hydroperoxide group, and (d) polymerizable monomer, wherein the (d) polymerizable monomer contains (d-1) acidic group-non-containing polymerizable monomer, and wherein a pore volume of the inorganic particle which is non-reactive with a transition metal of the period 4 in the periodic table is 0.2 cc/g or less.

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：US11547541B2

公开(公告)日：2023-01-10

申请号：US16575867

申请日：2019-09-19

Applicant: SHOFU INC.

Inventor： Daisuke Hara ,  Naoya Kitada ,  Kenzo Yamamoto ,  Yasuhiro Nishino ,  Yoshiyuki Jogetsu

IPC: G01J3/00 ,  A61C19/10 ,  A61K6/849 ,  A61K6/15 ,  A61K6/30 ,  A61K6/78

Abstract: [Problem]
To select a dental cement or a trial test material for easily obtaining high color tone adaptability to peripheral tooth substances, in mounting of or trial test of a prosthesis device
[Solution]
To provide a dental cement set consisting of a plurality of dental cements having color tones including color tones of 3 to n colors for selecting and using a dental cement from the plurality of dental cements having the color tones including the color tones of the 3 to n colors after trial test with trial test materials for the dental cement to be used from the plurality of dental cements having the color tones including the color tones of the 3 to n colors, wherein: the amount of information loss Pin with regard to first principal component determined by principal component analysis is less than 2, and. the dental cement set satisfies following Formula 1. 2≤((CL*p−1−CL*p)2+(Ca*p−1−Ca*p)2+(Cb*p−1−Cb*p)2)1/2

公开(公告)号：US20220401312A1

公开(公告)日：2022-12-22

申请号：US17692568

申请日：2022-03-11

Applicant: SHOFU INC.

Inventor： Kenzo YAMAMOTO ,  Hideto KASABA ,  Daisuke HARA ,  Shunsuke MIYATA

IPC: A61K6/896 ,  A61C5/00 ,  A61K6/76 ,  A61K6/62

Abstract: [Problem]
To provide a dental photocurable composition which has sufficient mechanical property and whose rheological property is not deactivated even after long-term storage.
[Solution]
The dental photocurable composition of the present disclosure comprises (A) polymerizable monomer, (B) photosensitizer, (D) photopolymerization accelerator and (E) filler, wherein, the dental photocurable composition comprises (D1) aliphatic tertiary amine compound represented by formula (1) as the (D) photopolymerization accelerator, and the dental photocurable composition comprises (E1) hydrophobized silica fine particle having an average diameter of primary particle of 1 to 40 nm as the (E) filler. (wherein R1 represents a substituent consisting of three or more carbons having an electron-withdrawing group at α-carbon and/or ε-carbon of an amine starting from N, R2 represents a substituent consisting of three or more carbons which may have an electron-withdrawing group, R3 represents a substituent consisting of one or more carbons which may have an electron-withdrawing group, and α-carbon of N in the formula (1) is not an electron-withdrawing group.)

公开(公告)号：US20220202656A1

公开(公告)日：2022-06-30

申请号：US17502404

申请日：2021-10-15

Applicant: SHOFU INC.

Inventor： Kazumichi NONAKA ,  Shuhei TAKAHASHI

IPC: A61K6/84 ,  A61K6/818

Abstract: To provide a liquid for improving translucency for dental zirconia calcined body which may impart high translucency which is similar to an enamel of a natural tooth to a zirconia sintered body and a method for using thereof.
The liquid for improving translucency for dental zirconia calcined body of the present disclosure contains a solvent and an indium compound, wherein a content of the indium compound based on the total amount of the liquid improving translucency for dental zirconia calcined body is within a range of 2.0 wt. % to 20.0 wt. % in terms of indium.