Patents Assigned to Kuraray Noritake Dental Inc.
  • Adhesive composition for dental use
    Patent number: 11304879
    Abstract: The present invention provides a dental adhesive composition that, even after photocuring with a high-output LED irradiator, shows high bond strength not only for dentin untreated by phosphoric acid etching but also for dentin treated by phosphoric acid etching. The present invention relates to a dental adhesive composition comprising a phosphoric acid group-containing polymerizable monomer (A), the phosphoric acid group-containing polymerizable monomer (A) comprising: a dihydrogen phosphate monoester group-containing polymerizable monomer (A-1) represented by general formula (1); a hydrogen phosphate diester group-containing polymerizable monomer (A-2) represented by general formula (2); and a phosphoric acid tetraester group-containing polymerizable monomer (A-3) represented by general formula (3).
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: April 19, 2022
    Assignee: KURARAY NORITAKE DENTAL INC.
    Inventors: Yamato Nojiri, Naoki Nishigaki, Mitsunobu Kawashima
  • Workpiece unit
    Patent number: 11284975
    Abstract: A workpiece unit including a workpiece body having a protruding portion; and a holding member arranged on at least a part of an outer side of the protruding portion.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: March 29, 2022
    Assignee: KURARAY NORITAKE DENTAL INC.
    Inventors: Yoshihisa Ito, Tetsuo Yamada
  • DENTAL MILL BLANK AND DENTAL PROSTHESIS
    Publication number: 20220087794
    Abstract: A mill blank may have a multilayer structure and desirable aesthetics. Such dental mill blanks may include a mill blank portion having a layered structure of two or more layers, and in which the layered structure includes an enamel layer and a core layer, the core layer comprising a first portion that is substantially a frustum, the frustum having a side face forming a part of an interface between the enamel layer and the core layer.
    Type: Application
    Filed: December 25, 2019
    Publication date: March 24, 2022
    Applicant: KURARAY NORITAKE DENTAL INC.
    Inventors: Atsushi MATSUMOTO, Hiroyuki SAKAMOTO, Shinichiro KATO, Yoshihisa ITO
  • DENTAL MILL BLANK WITH OPTIMIZED COLOR TONE
    Publication number: 20220071746
    Abstract: A dental mill blank can be fabricated, through a milling process, into a highly aesthetic dental prosthesis having an opalescent quality characteristic of natural teeth and also having a sufficient chroma level. Such a dental mill blank may include: 40 mass % or more of an inorganic filler, the dental mill blank satisfying conditions (1) and (2): (1) a specimen with a thickness of 1.20±0.01 mm has a chromaticity satisfying ?0.5?a*black?2.5 and 12.0?b*black?25.0 in the L*a*b* color system when measured against a black background; and (2) the specimen with a thickness of 1.20±0.01 mm has an opalescence value of 17.5 or more.
    Type: Application
    Filed: December 27, 2019
    Publication date: March 10, 2022
    Applicant: KURARAY NORITAKE DENTAL INC.
    Inventor: Shogo HIRAMATSU
  • ADHESIVE COMPOSITION FOR DENTAL USE
    Publication number: 20220071852
    Abstract: The present invention provides a dental adhesive composition that exhibits high bond strength (initial bond strength and bond durability) to sandblasted zirconia. The present invention relates to a dental adhesive composition comprising a dihydrogen phosphate monoester group-containing polymerizable monomer (A) represented by a general formula (1) and a dihydrogen phosphate monoester group-containing compound (B) represented by a general formula (2). (The definitions of the symbols are omitted.
    Type: Application
    Filed: December 20, 2019
    Publication date: March 10, 2022
    Applicant: KURARAY NORITAKE DENTAL INC.
    Inventors: Yamato NOJIRI, Naoki NISHIGAKI, Mitsunobu KAWASHIMA
  • COLORING SOLUTION FOR ZIRCONIA
    Publication number: 20220061967
    Abstract: The present invention provides a coloring solution for zirconia, which, when used on zirconia before firing of the zirconia, causes the zirconia to exhibit only a slight color difference before and after the firing and thus enables accurate prediction of the post-firing color tone of the zirconia. The present invention relates to a coloring solution for zirconia, comprising: a coloring agent (A) that is decolorized after firing of zirconia; and a metal ion solution (B), wherein, when zirconia is colored with the coloring solution and then subjected to firing, the color difference of the zirconia before and after the firing satisfies ?L*?5.8, ?a*?2.4, and ?b*?4.3.
    Type: Application
    Filed: December 25, 2019
    Publication date: March 3, 2022
    Applicant: KURARAY NORITAKE DENTAL INC.
    Inventor: Yuta TAJIMA
  • ZIRCONIA SINTERED BODY
    Publication number: 20220047364
    Abstract: The present invention provides a zirconia sintered body that has less excess material to be removed when making a prosthesis by milling, providing a reduction of work time, more durability for a working tool, and a faster treatment for patients, and that undergoes little deformation during firing, and provides enhanced aesthetics. The present invention relates to a columnar zirconia sintered body having a base and a side face, the base having a surface shape that is neither square nor rectangular but has at least one straight portion.
    Type: Application
    Filed: December 16, 2019
    Publication date: February 17, 2022
    Applicant: KURARAY NORITAKE DENTAL INC.
    Inventors: Shinji HARADA, Yoshihisa YAMADA
  • RESIN COMPOSITION FOR OPTICAL SHAPING
    Publication number: 20220041777
    Abstract: A resin composition for optical shaping comprising: an ?,?-unsaturated double bond group-containing compound (A) having a ring structure (a) containing a nitrogen atom; a (meth)acrylic acid ester compound (B) having a boiling point of 280° C. or more at normal pressure, having a carbocyclic group, and having no nitrogen-containing heterocyclic group; a photopolymerization initiator (C); and optionally, a polyfunctional polymerizable monomer (E) having a molecular weight of 500 or less and not comprised in the ?,?-unsaturated double bond group-containing compound (A) and the (meth)acrylic acid ester compound (B), wherein the content of the polyfunctional polymerizable monomer (E) having a molecular weight of 500 or less is 20 mass % or less relative to the total amount of polymerizable compounds comprised in the resin composition for optical shaping.
    Type: Application
    Filed: December 9, 2019
    Publication date: February 10, 2022
    Applicant: KURARAY NORITAKE DENTAL INC.
    Inventors: Misaki ITO, Kenji SUZUKI
  • ZIRCONIA PRE-SINTERED BODY SUITABLE FOR DENTAL USE
    Publication number: 20220017423
    Abstract: The present invention provides a zirconia pre-sintered body that can be fired into a sintered body having translucency and strength suited for dental use (particularly, at the dental clinic), even with a short firing time. The present invention relates to a zirconia pre-sintered body comprising: zirconia; and a stabilizer capable of inhibiting a phase transformation of zirconia, wherein the zirconia predominantly comprises a monoclinic crystal system, and the zirconia pre-sintered body comprises a plurality of layers that differ from each other in the content of the stabilizer relative to the total mole of the zirconia and the stabilizer.
    Type: Application
    Filed: December 26, 2019
    Publication date: January 20, 2022
    Applicant: KURARAY NORITAKE DENTAL INC.
    Inventors: Shinichiro KATO, Yoshihisa ITO
  • DENTAL COMPOSITION
    Publication number: 20220008297
    Abstract: A dental composition may have good handling properties and low polymerization shrinkage stress, and be capable of producing a cured product having desirable mechanical strength and excellent transparency. A dental composition may include a polymerizable monomer (A), a filler (B), and a polymerization initiator (C), wherein the polymerizable monomer (A) includes a polyfunctional (meth)acrylic monomer (a-1) having an aromatic ring but no hydroxyl group, and a polyfunctional (meth)acrylic monomer (a-2) having an alicyclic skeleton, and the polyfunctional (meth)acrylic monomer (a-1) and the polyfunctional (meth)acrylic monomer (a-2) have a mass ratio (a-1)/(a-2) of 30/70 to 95/5.
    Type: Application
    Filed: November 26, 2019
    Publication date: January 13, 2022
    Applicant: KURARAY NORITAKE DENTAL INC.
    Inventors: Hayato MIYAKAWA, Hirotaka HORIGUCHI, Tatsuya KAJIKAWA
  • DENTAL CLEANER AND DENTAL REMOVER FOR TEMPORARY ADHESIVES
    Publication number: 20220008314
    Abstract: The present invention provides a dental cleaner that provides desirable cleanliness against contamination of dental restorations and abutment teeth due to protein-containing body fluids while ensuring uniform quality by reducing precipitation of salts, and that ensures desirable bond durability after cleaning while being safe to use in the oral cavity. The present invention relates to a dental cleaner comprising an acidic group-containing radical polymerizable monomer (a), water (b), and an organic amine compound (c). The present invention also relates to a dental remover for temporary adhesives comprising an acidic group-containing compound (A), water (B), and a basic compound (C).
    Type: Application
    Filed: November 19, 2019
    Publication date: January 13, 2022
    Applicant: KURARAY NORITAKE DENTAL INC.
    Inventors: Keishu OKADA, Mariko KAWANA, Nobusuke KASHIKI, Yamato NOJIRI, Yuko TAJIRI, Atsushi MINE, Hirofumi YATANI
  • Liquid pouring member and container
    Patent number: 11214415
    Abstract: A liquid pouring member capable of effectively preventing the liquid from spouting upon opening. An inner plug includes a nozzle, a base to be engaged with an opening of a container, and a hollow cylindrical skirt. The nozzle includes a nozzle upper part extending from an upper surface of the base and a nozzle lower part extending from a lower surface of the base. The nozzle upper part includes an outlet port, and the nozzle lower part includes an inlet port. An inner passage is formed from the inlet port to the outlet port while penetrating therethrough. The nozzle lower part is formed in a radial inner side of the hollow cylindrical skirt, and includes an end portion with an inclined surface. The inlet port is formed in the inclined surface.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: January 4, 2022
    Assignee: KURARAY NORITAKE DENTAL INC.
    Inventors: Yamato Nojiri, Kazutoshi Ikeda, Takashi Makabe, Yusuke Fujimura, Shuji Bunno, Kaori Tada
  • DENTAL ADHESIVE MATERIAL KIT
    Publication number: 20210393488
    Abstract: The present invention provides a dental adhesive material kit that has desirable adhesive properties for tooth structure, and that, while ensuring appropriate strength, enables easy removal of excess cement in a semi-cured state created by temporarily applying light to excess portions of cement with a photoirradiator. The present invention relates to a dental adhesive material kit comprising a dental aqueous adhesive composition (A) and a dental curable composition (B), and satisfying the following formula (I) 0?t2?t1?3.0??(I), wherein t1 (min) represents a contactual polymerization start time of the dental aqueous adhesive composition (A) and the dental curable composition (B), and t2 (min) represents a polymerization start time of the dental curable composition (B).
    Type: Application
    Filed: November 27, 2019
    Publication date: December 23, 2021
    Applicant: KURARAY NORITAKE DENTAL INC.
    Inventors: Ling HONG, Nobusuke KASHIKI
  • Workpiece unit and method for producing same
    Patent number: 11185397
    Abstract: A workpiece unit containing a workpiece body is provided. A method for producing the workpiece unit is also provided. The workpiece body contains a plurality of sections. The sections divide the processing surface of the workpiece body. The size of each section of the workpiece body can be adjusted or selected according to the demand so that it is possible to increase utilization efficiency of the workpiece body.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: November 30, 2021
    Assignee: KURARAY NORITAKE DENTAL INC.
    Inventors: Yoshihisa Ito, Yoshihisa Yamada, Naofumi Murata
  • Multi-part dental cement
    Patent number: 11173100
    Abstract: The present invention provides a dental cement showing excellent storage stability, undergoing little change in paste properties during long-term storage, and having a small solidification risk during long-term storage. The present invention relates to a multi-part dental cement comprising: a first paste comprising an acid group-containing (meth)acrylic polymerizable monomer (a), a polyfunctional (meth)acrylic polymerizable monomer (b) containing no acid group, an oxidizing agent (c-1) of a chemical polymerization initiator, and a filler (d); and a second paste comprising a polyfunctional (meth)acrylic polymerizable monomer (b) containing no acid group, a reducing agent (c-2) of a chemical polymerization initiator, and a filler (e), wherein the filler (d) is treated with a surface treatment agent and has an average particle diameter of 0.01 to 50.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: November 16, 2021
    Assignee: KURARAY NORITAKE DENTAL INC.
    Inventors: Mariko Kawana, Shumei Ishihara, Mitsuru Takei, Kengo Futami
  • DENTAL TREATMENT ASSISTANCE DEVICE, DENTAL TREATMENT ASSISTANCE SYSTEM, DENTAL TREATMENT ASSISTANCE METHOD, DENTAL TREATMENT ASSISTANCE PROGRAM, AND DENTAL PRODUCT SALES PROMOTION DEVICE
    Publication number: 20210338400
    Abstract: A dental treatment assistance device includes a display, an input part into which input information on at least one of a use purpose and a use product is input, a memory that stores product information and process procedure information for a purpose of each product, a product information acquiring part that acquires the product information and the process procedure information corresponding to the input information input from the input part; and a display image control part that displays a predetermined process procedure selected from the process procedure information on the display.
    Type: Application
    Filed: October 10, 2019
    Publication date: November 4, 2021
    Applicant: KURARAY NORITAKE DENTAL INC.
    Inventors: Naofumi MURATA, Satoshi YAMAGUCHI
  • ZIRCONIA COMPOSITION, PARTIALLY SINTERED MATERIAL AND SINTERED MATERIAL AND METHODS FOR PRODUCTION THEREOF, AND LAMINATE
    Publication number: 20210308018
    Abstract: A composition includes granules in which zirconia particles are aggregated. The granules have an average circularity of 0.81 or greater based on a projected image.
    Type: Application
    Filed: April 9, 2021
    Publication date: October 7, 2021
    Applicant: KURARAY NORITAKE DENTAL INC.
    Inventor: Yoshihisa ITO
  • WORKPIECE UNIT AND METHOD OF PRODUCING SAME
    Publication number: 20210298880
    Abstract: Provided are a workpiece unit in which a holding member is attached to a workpiece body without use of an adhesive, and a method of producing the unit. The workpiece unit comprises a workpiece body, and a holding member which is arranged at at least a part of an outer circumferential portion of the workpiece body and directly contacts with at least a part of the outer circumferential portion.
    Type: Application
    Filed: March 11, 2021
    Publication date: September 30, 2021
    Applicant: KURARAY NORITAKE DENTAL INC.
    Inventors: Yoshihisa ITO, Tetsuo YAMADA
  • ZIRCONIA SINTERED BODY, ZIRCONIA COMPOSITION, ZIRCONIA PRE-SINTERED BODY AND DENTAL PROSTHESIS
    Publication number: 20210282907
    Abstract: A zirconia sintered body is provided in which the strength between layers of powders is improved. A flexural strength of a test sample of the zirconia sintered body, measured pursuant to JISR1601, is not less than 1000 MPa. The test sample is formed by preparing a plurality of zirconia powders, each containing zirconia and preferably yttria as a stabilizer that suppresses phase transition of zirconia, the zirconia powders differing in a composition, layering the zirconia powders to form a zirconia composition, and sintering the zirconia composition to form a zirconia sintered body. The flexural strength is measured such that a load point is positioned at a boundary of the zirconia powders, the boundary traversing the test sample of the sintered body along a direction of load application.
    Type: Application
    Filed: May 27, 2021
    Publication date: September 16, 2021
    Applicant: KURARAY NORITAKE DENTAL INC.
    Inventors: Yoshihisa YAMADA, Atsushi MATSUMOTO, Yoshihisa ITO
  • ZIRCONIA SINTERED BODY, ZIRCONIA COMPOSITION, ZIRCONIA PRE-SINTERED BODY AND DENTAL PROSTHESIS
    Publication number: 20210282908
    Abstract: A zirconia pre-sintered body suitable for dental milling, grinding and/or cutting can provide a sintered body in which the strength between layers of powders is improved. A flexural strength of a test sample of the zirconia sintered body, measured pursuant to JISR1601, is preferably not less than 1000 or 1100 MPa.
    Type: Application
    Filed: May 27, 2021
    Publication date: September 16, 2021
    Applicant: KURARAY NORITAKE DENTAL INC.
    Inventors: Yoshihisa YAMADA, Atsushi MATSUMOTO, Yoshihisa ITO