公开(公告)号：EP4455109A1

公开(公告)日：2024-10-30

申请号：EP22911376.6

申请日：2022-12-22

Applicant: Kuraray Noritake Dental Inc.

Inventor： NAKANO Kirihiro ,  KASHIKI Nobusuke

IPC: C04B35/486

Abstract: The present invention provides a zirconia composition that exhibits excellent translucency in its sintered body and that enables the mitigation of opalescent properties in the sintered body. The invention also provides a zirconia pre-sintered body and zirconia sintered body therefrom, along with methods that enable easy production of these. The present invention relates to a zirconia composition comprising a zirconia particle, and a stabilizer particle capable of preventing a phase transformation of zirconia, wherein: the zirconia has an average particle diameter (r1) of 1 to 60 nm, the stabilizer has an average particle diameter (r2) of 1 to 60 nm, and the half width of a peak derived from the stabilizer in a powder X-ray diffraction pattern by CuKα radiation is 0.05° to 1.0°. Using the zirconia composition allows the zirconia sintered body to exhibit reduced regularity in its structure, mitigating wavelength-selective reflection and/or transmission, resulting in reduced opalescent properties. This leads to the production of a zirconia sintered body that exhibits excellent translucency and low opalescent properties.

公开(公告)号：EP4438026A1

公开(公告)日：2024-10-02

申请号：EP22968572.2

申请日：2022-12-16

Applicant: Kuraray Noritake Dental Inc.

Inventor： NAKANO Kirihiro ,  SAKAMOTO Hiroyuki ,  KASHIKI Nobusuke ,  KATO Shinichiro ,  ISHINO Hiroshige

IPC: A61K6/802 ,  A61C5/70 ,  A61C13/00 ,  A61C13/083 ,  A61K6/17 ,  A61K6/804 ,  C04B35/117

CPC classification number: A61C5/70 ,  A61C13/00 ,  A61C13/083 ,  A61K6/17 ,  A61K6/802 ,  A61K6/804 ,  C04B35/117

Abstract: The present invention provides an alumina pre-sintered body that demonstrates reduced yellowing after sintering, exhibits high translucency and high linear light transmittance in the sintered body even when sintered under atmospheric pressure, and yields an alumina sintered body with high aesthetics suitable for dental applications. The present invention relates to an alumina pre-sintered body for dental use comprising alumina particles with an average primary particle diameter of 30 to 300 nm, a sintering aid, and a bluish colorant, wherein the content of the sintering aid is 10 to 5,000 ppm.

公开(公告)号：EP4413967A1

公开(公告)日：2024-08-14

申请号：EP22878638.0

申请日：2022-10-07

Applicant: Kuraray Noritake Dental Inc.

Inventor： NOJIRI, Yamato ,  KAWANA, Mariko ,  OKADA, Keishu

IPC: A61K6/887 ,  A61K6/60 ,  A61K6/831 ,  A61K6/836 ,  A61K6/84

CPC classification number: A61K6/887 ,  A61K6/831 ,  A61K6/84 ,  A61K6/836 ,  A61K6/60

Abstract: The present invention provides a separate-pack type dental curable composition having favorable chemical polymerization curability, and excellent bond durability to CAD/CAM resins. The present invention relates to a separate-pack type dental curable composition comprising a polymerizable monomer (A) having an acidic group, a polymerizable monomer (B) having no acidic group, an ascorbic acid compound (C), an organic peroxide (D), a transition metal compound (E), and a silane coupling agent (F) represented by the following general formula (f-1). (Description of the symbols in the formula is omitted.)

公开(公告)号：EP4403162A1

公开(公告)日：2024-07-24

申请号：EP22870061.3

申请日：2022-09-16

Applicant: Kuraray Noritake Dental Inc.

Inventor： SUZUKI, Kenji

IPC: A61K6/887 ,  A61K6/813 ,  A61K6/816

CPC classification number: A61K6/887 ,  A61K6/816 ,  A61K6/813

Abstract: The present invention relates to a plate denture production kit for stereolithography including a curable composition for a denture base (I) containing a (meth)acrylic based polymerizable monomer component (A) containing a (meth)acrylic based polymerizable monomer (m) as a major monomer, and a photopolymerization initiator, and a composition for a prosthetic tooth (II) containing a (meth)acrylic based polymerizable monomer component (B) containing the same (meth)acrylic based polymerizable monomer (m) as contained in the curable composition for a denture base (I), having a content of the (meth)acrylic based polymerizable monomer (m) of 20% by mass or more based on 100% by mass of the (meth)acrylic based polymerizable monomer component (B), and a method of producing a plate denture.

公开(公告)号：EP4403159A1

公开(公告)日：2024-07-24

申请号：EP22870060.5

申请日：2022-09-16

Applicant: Kuraray Noritake Dental Inc.

Inventor： SUZUKI, Kenji

IPC: A61K6/30 ,  A61K6/58 ,  A61K6/62 ,  A61K6/887

CPC classification number: A61K6/58 ,  A61K6/887 ,  A61K6/30 ,  A61K6/62

Abstract: The present invention relates to a method of producing a denture, including adhering a denture base that is a stereolithographic article of a curable composition (I) containing a (meth)acrylic based polymerizable monomer component (A) containing a (meth)acrylic based polymerizable monomer (m) as a major monomer, and a photopolymerization initiator, and a prosthetic tooth containing an acrylic based resin (II), with an adhesive composition containing a composition (III) containing a (meth)acrylic based polymerizable monomer component (C) containing the same (meth)acrylic based polymerizable monomer (m) as contained in the curable composition (I).

公开(公告)号：EP4364718A1

公开(公告)日：2024-05-08

申请号：EP22833188.0

申请日：2022-06-28

Applicant: Kuraray Noritake Dental Inc.

Inventor： SAKAMOTO, Hiroyuki ,  KASHIKI, Nobusuke ,  YOSHIDA, Miki ,  NOZAKI, Akira ,  HARA, Chihiro

IPC: A61K6/896 ,  A61K6/20 ,  A61K6/60 ,  A61K6/64 ,  A61K6/71 ,  A61K6/76 ,  A61K6/818 ,  A61K6/887 ,  A61K6/893

CPC classification number: A61K6/896 ,  A61K6/893 ,  A61K6/76 ,  A61K6/887 ,  A61K6/64 ,  A61K6/20 ,  A61K6/71 ,  A61K6/60 ,  A61K6/818

Abstract: The present invention provides a dental curable composition and a dental prosthesis therewith with which shade changes in the base material can be reduced, and that exhibit excellent gloss retention in the cured product while demonstrating excellence in operability. The present invention relates to a dental curable composition comprising a polymerizable compound (A), a polyfunctional thiol (B) having two or more mercapto groups per molecule, a polysiloxane (C), and a polymerization initiator (D).

公开(公告)号：EP4324807A1

公开(公告)日：2024-02-21

申请号：EP22788224.8

申请日：2022-04-15

Applicant: Kuraray Noritake Dental Inc.

Inventor： KUDO, Yasutaka ,  NAKANO, Kirihiro

IPC: C04B35/486 ,  A61C5/77 ,  A61C13/083 ,  C01G25/02 ,  C04B35/63 ,  C04B35/632

Abstract: The present invention provides a zirconia sintered body that excels in both mechanical strength and translucency, and a zirconia molded body and zirconia pre-sintered body capable of providing such a zirconia sintered body, and containing a binder in an amount that assumes a thickness of 10 mm or more. The invention also provides methods of production of these. The present invention relates to a zirconia molded body comprising: a zirconia particle containing 2.0 to 9.0 mol% of yttria relative to the total number of moles of zirconium oxide and yttria, and having an average primary particle diameter of 60 nm or less; a polyol; and a binder, the polyol and the binder satisfying the relational formula X1 _ 500°C. (The descriptions of the symbols in the formula are omitted.)

公开(公告)号：EP4268792A1

公开(公告)日：2023-11-01

申请号：EP21915324.4

申请日：2021-12-28

Applicant: Kuraray Noritake Dental Inc.

Inventor： SUZUKI, Kenji

IPC: A61K6/60 ,  A61K6/35 ,  A61K6/62 ,  A61L24/06

Abstract: The present invention provides a stereolithographic article adhesive composition having excellent adhesiveness with respect to a shaped article produced by stereolithography. The present invention relates to a stereolithographic article adhesive composition comprising a multifunctional (meth)acrylic-based polymerizable monomer (A) and a photopolymerization initiator (B). The multifunctional (meth)acrylic-based polymerizable monomer (A) preferably contains at least one of a urethanated (meth)acrylic acid ester compound (a-1), an aromatic compound-based (meth)acrylic acid ester compound (a-2) containing no urethane bond, and a (meth)acrylamide group-containing polymerizable monomer (a-3).

公开(公告)号：EP4223723A1

公开(公告)日：2023-08-09

申请号：EP21875649.2

申请日：2021-09-28

Applicant: Kuraray Noritake Dental Inc.

Inventor： NAKANO, Kirihiro ,  SAKAI, Kazuya ,  KASHIKI, Nobusuke ,  ITO, Sho ,  MATSUMOTO, Atsushi ,  ITO, Yoshihisa

IPC: C04B35/486 ,  A61C5/70 ,  A61C13/083

Abstract: The present invention provides a zirconia pre-sintered body having excellent machinability and having a low probability of pillar fracture or chipping during milling. A method of production of such a zirconia pre-sintered body is also provided. The present invention relates to a zirconia pre-sintered body comprising zirconia, and a stabilizer capable of reducing a phase transformation of zirconia, the content of the stabilizer being 3 to 8 mol% relative to the total mole of the zirconia and the stabilizer, at least a part of the stabilizer being not dissolved in zirconia as a solid solution, and the zirconia pre-sintered body having a Vickers hardness of 65 to 135HV 5/30 as measured in compliance with JIS Z 2244:2009.

公开(公告)号：EP4177234A1

公开(公告)日：2023-05-10

申请号：EP21833528.9

申请日：2021-07-01

Applicant: Kuraray Noritake Dental Inc.

Inventor： KATO, Shinichiro ,  MATSUMOTO, Atsushi

IPC: C04B35/488 ,  A61C5/77 ,  A61C13/083 ,  C01G25/02 ,  C04B35/48

Abstract: The present invention provides a zirconia pre-sintered body that exhibits suitable shade, translucency, and strength with short firing. The present invention relates to a zirconia pre-sintered body comprising a multilayer structure including at least three layers containing zirconia and a stabilizer capable of reducing a phase transformation of zirconia, the zirconia comprising predominantly monoclinic crystal system, the multilayer structure including at least two layers that differ from one another in the content of the stabilizer relative to the total mole of the zirconia and the stabilizer, the multilayer structure including at least two layers having substantially the same stabilizer content relative to the total mole of the zirconia and the stabilizer, the zirconia pre-sintered body containing a color component in all of the layers having substantially the same stabilizer content, and the layers having substantially the same stabilizer content differing from one another in the composition of the color component.