Patents Assigned to GC Corporation
  • Patent number: 10392259
    Abstract: An object is to provide a method for manufacturing a calcium carbonate block of no less than 0.1 cm in diameter and thickness, not including any impurities, and able to be employed as a raw material of an artificial bone that requires biosafety: the method includes: (a) shaping a calcium hydroxide block; (b) being exposed to carbon dioxide; and (c) immersing in a carbonate ion containing solution.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: August 27, 2019
    Assignees: GC CORPORATION, Kyushu University, National University Corporation
    Inventors: Kunio Ishikawa, Katsushi Yamamoto
  • Publication number: 20190209271
    Abstract: [Object] An object is to provide dental braces in which sufficient adhesion strength can be maintained by simple processing within the oral cavity of a person to be treated for a long time and with which it is possible to reduce an uncomfortable feeling when the dental braces are fitted. [Solution Means] A dental brace 1a is mainly formed with a bracket main body portion 2a, an opening/closing lid portion 3a and a tooth abutting plate portion 4a. The tooth abutting plate portion 4a includes, on one surface side, a first surface portion 41 which abuts on the surface of a tooth T on the side of a tongue and includes, on a side opposite to the first surface portion 41, a second surface portion 42 to which the bracket main body portion 2b is adhered, and a charge hole portion 44 is formed which penetrates from the first surface portion 41 to the second surface portion 42.
    Type: Application
    Filed: November 22, 2017
    Publication date: July 11, 2019
    Applicants: KIRISHIMA SEIKO CO., LTD., MEDICAL CORPORATION KYOUJIN-KAI-SHIMODA ORTHODONTIC CLINIC, GC CORPORATION
    Inventors: Junichi NISHISHIGE, Tetsuya SHIMODA
  • Publication number: 20190183605
    Abstract: To provide an air injection device for a dental handpiece which makes it possible to obtain a clear image even if the position of an image taking part is changed, provided is an air injection device including: a trunk connector (41) that is in a form of a column, in the trunk connector a passage being formed; an air guiding pipe (45) that is in a form of a pipe, one end of the air guiding pipe being connected to the trunk connector, the air guiding pipe having flexibility; and a means (46) that retains the air guiding pipe in the dental handpiece main body, wherein the passage in the trunk connector branches, one of the branching passages communicating with the air guiding pipedental handpiece.
    Type: Application
    Filed: July 18, 2017
    Publication date: June 20, 2019
    Applicants: GC CORPORATION
    Inventors: Osamu MOTOYAMA, Ryouji KINAMI, Shunjirou KUME, Takahiro UENOYAMA
  • Publication number: 20190167380
    Abstract: Provided is a packaging body for viscous dental material of easy structure, including a container (11) of cylindrical shape whose wall thickness is 0.1 mm to 0.8 mm, including one end closed with a sealed part (12a) that is formed of facing edges of the one end, the edges being joined together; and a viscous dental material (15) filled inside the container, having a consistency of 10 mm to 25 mm.
    Type: Application
    Filed: June 26, 2017
    Publication date: June 6, 2019
    Applicant: GC Corporation
    Inventors: Takumi SUZUKI, Yuji FUJIMAKI
  • Publication number: 20190142705
    Abstract: A method for kneading a dental gypsum powder is provided that includes putting the dental gypsum powder and water in a bottle, the dental gypsum powder containing gypsum hemihydrate and a polycarboxylate-based water reducing agent, contained at 0.05 parts by mass to 0.8 parts by mass with respect to 100 parts by mass of the gypsum hemihydrate, sealing the bottle, and shaking the bottle.
    Type: Application
    Filed: April 20, 2017
    Publication date: May 16, 2019
    Applicant: GC Corporation
    Inventors: Daizaburo MORI, Masatoshi YOSHINAGA, Kaori WATANABE
  • Publication number: 20190142549
    Abstract: A dispenser includes a guide shaft, a housing, accommodating the guide shaft, and supporting the guide shaft movably frontward and rearward along an axial direction, a slide block slidably mounted on the guide shaft, a piston shaft having one end mounted on the slide block, and another end projecting from the housing as the slide block moves frontward, a handle projecting from the housing, a slide bar having one end rotatably supported on the housing, and another end approaching the handle when rotated, and an engaging piece provided on the one end of the slide bar and engaging a guide groove formed in the guide shaft, wherein the engaging piece moves the guide shaft frontward when the other end of the slide bar is rotated to approach the handle due to an operation of a user.
    Type: Application
    Filed: April 26, 2017
    Publication date: May 16, 2019
    Applicants: GC Corporation, SHIODA Dental Company
    Inventors: Tatsunosuke MIYANO, Shigeaki MATSUNAGA
  • Publication number: 20190105133
    Abstract: A method for designing dentures according to which artificial teeth can be easily and accurately attached to a denture base, which is designed and shaped by CAD/CAM, when the artificial teeth are arranged on the denture base is provided. The method for designing a denture (10) on a computer based on data on an intraoral shape comprises: creating data on a shape of a denture base (20) based on the intraoral shape (S22); creating data on a position of an artificial tooth (30) to be arranged on the denture base (S23); and creating data on a shape of an occlusal guide (40) that is tabular and has a recess part corresponding to a shape of the arranged artificial tooth in an occlusal surface side (S24).
    Type: Application
    Filed: October 5, 2017
    Publication date: April 11, 2019
    Applicant: GC CORPORATION
    Inventors: Kiyotaka NAKAO, Takayuki MICHII
  • Patent number: 10245130
    Abstract: An object is to provide a polymerization apparatus for dental technique with which both of preliminary polymerization and final polymerization can be carried out by one apparatus. The apparatus includes a plurality of light sources whose light axes run at least in two directions; a cover that covers the light sources, forms a polymerization space inside thereof and switches a formation and closure of an opening that communicates inside and outside the polymerization space; a sensor that detects the formation and closure of the opening by the cover; a controller that receives signals from the sensor, and based on the formation and closure of the opening, turns on some of the light sources having two or more directions of light axis with the opening closed, and turns on some of the light sources having fewer directions of light axis than with the opening closed, with the opening open.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: April 2, 2019
    Assignee: GC CORPORATION
    Inventors: Yukie Noguchi, Mitsuaki Takada
  • Patent number: 10182894
    Abstract: An object is to provide a method for manufacturing a dental prosthesis consisting of a plurality of layers with high productivity. The method for manufacturing a dental prosthesis comprises: filling a cavity (21a) formed in a mold which has a shape of the dental prosthesis with a layered material body (23) that is made by layering materials (23a, 23b) corresponding to the plurality of layers; and after this filling, rotating the mold on a material inlet (21b) of the mold and cutting the materials.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: January 22, 2019
    Assignee: GC CORPORATION
    Inventors: Tatsuya Fujimoto, Masatoshi Yoshinaga, Go Mashio, Daisuke Ohta
  • Patent number: 10064789
    Abstract: A polymerizable composition includes at least one of an acrylate compound and a methacrylate compound; a barbiturate compound; an amino carboxylic acid-based chelating agent; a peroxy compound; and filler.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: September 4, 2018
    Assignee: GC Corporation
    Inventors: Naofumi Matsumoto, So Ishizuka, Mika Wako
  • Publication number: 20180237300
    Abstract: There is provided a method for manufacturing a porous material including a calcium carbonate, the method including a digestion carbonation process of causing digestion and carbonation of a porous material including a calcium oxide in a presence of water under a flow of a gas including carbon dioxide.
    Type: Application
    Filed: August 3, 2016
    Publication date: August 23, 2018
    Applicant: GC Corporation
    Inventors: Yuuhiro SAKAI, Katsuyuki YAMANAKA, Yusuke SHIGEMITSU
  • Patent number: 10039623
    Abstract: Provided is an impression tray with which three-dimensional data is easily obtained, including an upper jaw impression tray and lower jaw impression tray, wherein the upper jaw impression tray includes an upper jaw impression tray main body 11 including a surface where the impression material is to be placed; the lower jaw impression tray includes a lower jaw impression tray main body including a surface where the impression material is to be placed; a handle is attachably and detachably provided on at least either one of the upper jaw impression tray main body and lower jaw impression tray main body; and the handle, having a posture of attachment, projects from at least any one of a labial side, the upper jaw impression tray excepting the surface where the impression material is to be placed, and lower jaw impression tray excepting the surface where the impression material is to be placed.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: August 7, 2018
    Assignee: GC CORPORATION
    Inventors: Takayuki Michii, Hiroshi Kamohara, Tomohiro Kumagai
  • Publication number: 20180133113
    Abstract: In order to provide a material for forming a dental prosthesis which does not require further heat treatment after machining and can improve cutting ability even after obtaining necessary strength, the material for a dental prosthesis comprises 60.0 mass % or more and 80.0 mass % or less of SiO2, 10.0 mass % or more and 20.0 mass % or less of Li2O, and 5.1 mass % or more and 10.0 mass % or less of Al2O3.
    Type: Application
    Filed: April 20, 2016
    Publication date: May 17, 2018
    Applicant: GC Corporation
    Inventors: Tomohiro HOSHINO, Go MASHIO, Tatsuya FUJIMOTO, Masatoshi YOSHINAGA, Hayato YOKOHARA, Daisuke OHTA, Takuya SATO
  • Publication number: 20180110586
    Abstract: A polishing jig for machining tools which makes it possible for a deteriorating machining tool to be used again without detaching the machining tool, with which a processing machine is quipped, from the processing machine is provided. The polishing jig for machining tools comprises an attachment part to be attached to a processing machine; and a polishing face that is at least part of a surface of the polishing jig, the polishing face adapted to polish a processing part of a machining tool.
    Type: Application
    Filed: October 16, 2017
    Publication date: April 26, 2018
    Applicant: GC CORPORATION
    Inventors: Go MASHIO, Tatsuya FUJIMOTO, Hayato YOKOHARA, Tomohiro HOSHINO, Toshihiko AZUMA
  • Patent number: 9949896
    Abstract: Provided is a filler for dental glass ionomer cements, the filler to a surface of which a compound(s) having a carboxyl group(s) is/are bound via a silicon atom, for the purpose of providing: a filler suitable for dental glass ionomer cements that can provide a hardened cement having a high strength by being mixed with a dental glass ionomer cement composition, the filler that can be easily manufactured from a general inorganic powder as a raw material; and a manufacturing method of the filler for dental glass ionomer cements. The manufacturing method includes binding a carboxylic acid having an unsaturated double bond(s) exclusive of a (meth)acrylate compound to an inorganic powder whose surface is treated with a silane coupling agent having an unsaturated double bond(s).
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: April 24, 2018
    Assignee: GC CORPORATION
    Inventors: Yusuke Hokii, Ryosuke Yoshimitsu, Futoshi Fusejima
  • Patent number: 9937107
    Abstract: Provided is a fluoroaluminosilicate glass powder that can provide a dental glass ionomer cement hardened body excellent in acid resistance, the glass powder including sodium and potassium which have an effect of lowering the reflective index of glass. A mass ratio of potassium to sodium in the component is in the range of from 1.2 to 1.9 in terms of oxide.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: April 10, 2018
    Assignee: GC CORPORATION
    Inventors: Yusuke Hokii, Ryosuke Yoshimitsu, Shoichi Fukushima, Futoshi Fusejima
  • Patent number: 9877811
    Abstract: Provided is a method for producing a temporary prosthesis that can be easily performed at a dental clinic and that at the same time enables fabrication of a temporary prosthesis that is less susceptible to wear and damage. The present invention is achieved by fabricating an occlusal surface with a dental composite resin that has higher strength compared to a conventional room temperature polymerization resin. The method includes fabricating a prosthesis model, using an impression material to take an impression of a prepared tooth model having the prosthesis model mounted thereon, applying a layer of dental composite resin material to a portion that is to become a crown within the impression that has been removed from the prepared tooth model and polymerizing the composite resin material, putting a powder-liquid mixture of a powder-liquid type room temperature polymerization resin into the impression, refitting the prepared tooth model to the impression, and curing the room temperature polymerization resin.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: January 30, 2018
    Assignee: GC Corporation
    Inventor: Keisuke Ikushima
  • Patent number: D811600
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: February 27, 2018
    Assignee: GC Corporation
    Inventors: Kazuhisa Kashiwabara, Takayuki Michii
  • Patent number: D813397
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: March 20, 2018
    Assignee: GC Corporation
    Inventors: Kazuhisa Kashiwabara, Takayuki Michii
  • Patent number: D847659
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: May 7, 2019
    Assignee: GC Corporation
    Inventor: Takumi Suzuki