Patents Assigned to GC Corporation
  • Impression tray for local area
    Patent number: 9283058
    Abstract: The invention provides a plastic impression tray for a local area having an outer wall provided in an outer side of a curve of a bottom portion, and an inner wall provided in an inner side of the curve of the bottom portion. A rim having a particular height is provided in the bottom portion side along each of upper ends of the outer wall and the inner wall, elongated through holes each reaching the bottom portion from a portion just below the rim are formed approximately at uniform distances in the outer wall and the inner wall, circular through holes each having a particular diameter are formed at particular positions in the bottom portion, and elongated end portion side through holes each having a particular width and a particular length are provided vertically to an axial direction of the bottom portion, in both ends of the bottom portion.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: March 15, 2016
    Assignee: GC CORPORATION
    Inventors: Hidefumi Marumori, Hiroshi Kamohara
  • Dental glass ionomer cement composition
    Patent number: 9241880
    Abstract: To provide a dental glass ionomer cement composition having excellent adhesion strength to a metallic prosthesis. A dental glass ionomer cement composition includes a copolymer (A), a fluoroaluminosilicate glass powder (B) and water (C). The copolymer (A) includes a polymer or copolymer of ?-? unsaturated carboxylic acid, or includes a copolymer of ?-? unsaturated carboxylic acid and one or more kinds selected from a group of acrylamide, acrylonitrile, methacrylic acid ester, acrylates, vinyl chloride, allyl chloride and vinyl acetate. In the copolymer (A), the number of molecules of ?-? unsaturated carboxylic acid occupies 50% or more of the total number of molecules. The dental glass ionomer cement composition further includes a compound (D) which contains a sulfur atom in one molecule, includes a carboxylic group and an amino group and does not include a polymerizable group.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: January 26, 2016
    Assignee: GC CORPORATION
    Inventors: Koji Tanaka, Daisuke Ota, Hideki Yarimizu
  • DENTAL SYRINGE
    Publication number: 20150342705
    Abstract: Provided is a dental syringe that enables easy discharge of air within a syringe body 1 to the exterior while injecting dental material into the syringe body 1 from a discharge port 1a of the syringe body 1 and easy discharge of the dental material that has been injected into the syringe body 1 during use for treatment. A dental syringe includes a syringe body 1, a plunger 2, and an O-ring 3 to be mounted in an engagement groove 2a formed along a circumferential direction of a front end portion of the plunger 2. The engagement groove 2a includes a shallow groove 2aa at the front end side and a deep groove 2ab at the rear end side.
    Type: Application
    Filed: September 11, 2013
    Publication date: December 3, 2015
    Applicant: GC Corporation
    Inventors: Fumiko SUZUKI, Tatsunosuke MIYANO
  • Dental gypsum-bonded investment material powder
    Patent number: 9198837
    Abstract: The invention provides a dental gypsum-bonded investment material powder which can inhibit air bubbles from being generated in a mixed material, only by being mixed with water without using any special device or tool, and is easily mixed with the water. A specific siloxane is blended at a specific amount in relation to the dental gypsum-bonded investment material powder which includes an anionic surfactant and is excellent in a mold releasing action. In other words, the dental gypsum-bonded investment material powder is structured such as to have 0.001 to 0.2 weight % anionic surfactant, and 0.00001 to 0.0005 weight % cyclic siloxane having 3 to 10 SiO(CH3)2 units.
    Type: Grant
    Filed: September 26, 2013
    Date of Patent: December 1, 2015
    Assignee: GC CORPORATION
    Inventors: Daizaburo Mori, Emiko Fukushima, Haruhiko Horiuchi
  • BONE TISSUE REGENERATION SHEET AND PRODUCTION METHOD THEREOF
    Publication number: 20150240207
    Abstract: To provide a bone tissue regeneration sheet having a cortical bone tissue layer of 200 ?m or more in thickness, the bone tissue regeneration sheet is produced by seeding chondroblast or stem cells for differentiating to chondrocyte on one side of a porous bioabsorbable polymer sheet, taking the seeded porous body into a culture medium, applying centrifugal force of 100 to 1000 G to the culture medium for a predetermined time so as to aggregate the chondroblast or the stem cells for differentiating to chondrocyte, culturing the aggregated cells in a culture medium not containing serum but containing one or two or more kinds selected from ascorbic acid, an ascorbic acid derivative, and dexamethasone without applying centrifugal force to form a chondrocyte layer having a thickness of 200 ?m or more.
    Type: Application
    Filed: April 28, 2015
    Publication date: August 27, 2015
    Applicant: GC CORPORATION
    Inventors: Katsuyuki YAMANAKA, Katsushi YAMAMOTO, Youko SUDA, Yuhiro SAKAI, Tadashi KANEKO
  • Fluoroaluminosilicate glass powder and production method thereof
    Patent number: 9102813
    Abstract: [Problems to be Solved] To provide fluoroaluminosilicate glass powder enabling to improve acid resistance of dental glass ionomor cement and a production method thereof. [Solution] A lanthanum compound eluted in the presence of polycarboxylic acid and water exists only in a surface layer of a fluoroaluminosilicate glass powder. An amount of the fluoroaluminosilicate glass powder is preferably 1 to 5% by weight in terms of oxide. The fluoroaluminosilicate glass powder is produced by mixing an aqueous solution of a lanthanum compound and a fluoroaluminosilicate glass powder not containing lanthanum, and heating them. The aqueous solution of lanthanum compound is an aqueous solution of a water solvable lanthanum compound, preferably an aqueous solution of lanthanum nitrite and/or an aqueous solution of lanthanum chloride.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: August 11, 2015
    Assignee: GC CORPORATION
    Inventors: Yusuke Hokii, Katsuhito Kato, Futoshi Fusejima
  • Polymerizable compositions
    Patent number: 9079994
    Abstract: A polymerizable composition that comprises a first component comprising a (meth)acrylate and an organic peroxide as an oxidizing agent and a second component comprising a (meth)acrylate and a cysteine as a reducing agent which has a partial structure represented by the following structural formula, the first component and/or the second component further comprising a polymerization promoter:
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: July 14, 2015
    Assignee: GC CORPORATION
    Inventors: Koji Tanaka, Miki Nishiya, Futoshi Fusejima
  • Impression tray for upper jaw
    Patent number: 9050155
    Abstract: The invention provides a plastic impression tray for an upper jaw having a bottom portion provided with an outer wall and a bulge portion. A rim is provided along an upper end of the outer wall, elongated through holes having a particular width are provided in the outer wall such that a distance between the adjacent through holes is particular times the width, similar elongated through holes are provided in the bulge portion, circular through holes having a particular diameter are provided at the center of the distances of the adjacent elongated through holes in the outer wall, and elongated end portion side through holes having particular width and length are provided on a line connecting the bottom portion side end portions of the elongated through holes at the closest side to the end portions of the U-like shaped portion in the outer wall and the bulge portion.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: June 9, 2015
    Assignee: GC CORPORATION
    Inventors: Hidefumi Marumori, Hiroshi Kamohara
  • NOZZLE TIP
    Publication number: 20150041571
    Abstract: An nozzle tip capable of securely and unremovably locking after temporary fixing at a tip-end of a discharging portion of a mixing tip is provided. The nozzle tip includes an insertion portion having a cylindrical portion for temporary fixing, a taper portion, and a cylindrical portion for engaging. The cylindrical portion for temporary fixing has the same outer diameter as an inner diameter of a protrusion portion of the mixing tip. The taper portion is continuously provided on the cylindrical portion for temporary fixing and has a step portion. The cylindrical portion for engaging is continuously provided on the step portion of the taper portion and has an outer diameter which is equal to the diameter of the taper portion at the step portion and a length longer than a length of the protrusion portion of the mixing tip.
    Type: Application
    Filed: July 31, 2014
    Publication date: February 12, 2015
    Applicant: GC CORPORATION
    Inventors: Takumi SUZUKI, Tatsunosuke Miyano
  • Implant fixture storage case and implant fixture storage case set
    Patent number: 8950577
    Abstract: Provided is an implant fixture storage case capable to prevent mistake in combination. The implant fixture storage case comprises an implant fixture holding member (20) for holding an implant fixture and which has a length based on the implant fixture to be held, and a storage main body (10) on which a value related to the length of the implant fixture is displayed, and which holds the implant fixture holding member thereinside and has at least one part being transparent, and a position display means (12) provided to the storage main body based on a position of an end portion of the implant fixture holding member, wherein the end portion of the implant fixture holding member and the position display means are viewable at the same time.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: February 10, 2015
    Assignee: GC Corporation
    Inventors: Yoshihiro Sakaguchi, Kinya Nihei, Seiko Muraoka
  • IMAGE ACQUISITION DEVICE FOR DENTAL HANDPIECE, IMAGING APPARATUSF OR DENTAL HANDPIECE, DENTAL HANDPIECE AND DENTAL HANDPIECE SYSTEM
    Publication number: 20150037751
    Abstract: Provided is an image acquisition device for dental handpiece capable of acquiring a clear image even though cooling water is supplied. An image acquisition device (11) detachable to a dental handpiece body (1), the device including a light inlet part having a light acquisition port capable of acquiring light, a holding member (14, 15) holding the light inlet part to the dental handpiece body, wherein the light acquisition port can be held to the dental handpiece body by means of the holding member in such a manner that it can be shifted to a side which is away from an instrument than a plane of an instrument-mounting surface of a head (2) of the dental handpiece body and in a region outside of an outer peripheral surface of the head.
    Type: Application
    Filed: February 19, 2013
    Publication date: February 5, 2015
    Applicant: GC CORPORATION
    Inventor: Osamu Motoyama
  • FLUORESCENCE IMPARTING AGENT FOR CERAMICS
    Publication number: 20140367613
    Abstract: Provided is a fluorescence imparting agent for ceramics that does not require the use of an acidic solution during production. The fluorescence imparting agent for ceramics is a water solution containing 5 to 90% by weight of glycerin and 0.01 to 10% by weight of one or more bismuth compound selected from bismuth bromide (BiBr3), bismuth bromate (Bi(BrO3)3), bismuth chloride (BiCl3), bismuth chlorate (Bi(ClO3)3), bismuth fluoride (BiF3), bismuth pentafluoride (BiF5), bismuth hydroxide (Bi(OH)3), bismuth iodide (BiI3), bismuth iodate (Bi(IO3)3), bismuth nitrate (Bi(NO3)3), bismuth subnitrate (Bi5O(OH)9(NO3)4), bismuth phosphate (BiPO4), and bismuth sulfate (Bi2(SO4)3).
    Type: Application
    Filed: December 20, 2012
    Publication date: December 18, 2014
    Applicant: GC CORPORATION
    Inventors: Go Mashio, Syuji Kariya
  • FRACTURE TREATMENT DEVICE
    Publication number: 20140371748
    Abstract: Provided is a fracture treatment device enabling efficient bone regeneration. The fracture treatment device (10) for connecting a bone on one side of a fracture site and a bone on the other side of the fracture site, the device including a fixation member (11) having a stick shape, a tissue regeneration structure (15) disposed in a manner to cover at least a part of the fixation member, wherein the tissue regeneration structure includes a support body made of a bioabsorbable material and cells retained in the support body, which cells regenerate bone.
    Type: Application
    Filed: June 4, 2014
    Publication date: December 18, 2014
    Applicant: GC CORPORATION
    Inventors: Katsuyuki YAMANAKA, Yuuhiro SAKAI, Katsushi YAMAMOTO, Yusuke SHIGEMITSU, Tadashi KANEKO
  • CONTAINER COVER AND DRIPPING CONTAINER
    Publication number: 20140353337
    Abstract: Provided is a dripping container capable of inhibiting variation in dripping. The dripping container (1) capable of containing and dripping a liquid medicine, the dripping container includes a container (10) provided with a main body (11) to contain the liquid medicine formed in a tubular shape including a bottom on one side thereof and an opening portion (13a) with which the dripping container capable of dripping the liquid medicine, and a container cover (20) to cover the main body of the container, wherein the container cover includes an outer peripheral wall portion (21) to cover an outer peripheral portion of the container formed in a tubular shape and a bottom portion (22) to cover a bottom of the container, and a surface of the outer peripheral wall portion facing to the container is a surface having a close contact with the container.
    Type: Application
    Filed: May 23, 2014
    Publication date: December 4, 2014
    Applicant: GC CORPORATION
    Inventors: Takumi SUZUKI, Shinichi KOJIMA
  • Dental dispenser
    Patent number: D724202
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: March 10, 2015
    Assignee: GC Corporation
    Inventors: Tatsunosuke Miyano, Shigeru Igarashi
  • Dental plunger
    Patent number: D724722
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: March 17, 2015
    Assignee: GC Corporation
    Inventors: Tatsunosuke Miyano, Shigeru Igarashi
  • Tray for taking a partial dental impression
    Patent number: D726325
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: April 7, 2015
    Assignee: GC Corporation
    Inventors: Masahiro Tanaka, Junko Tanaka, Hiroshi Kamohara
  • Implant housing container
    Patent number: D731064
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: June 2, 2015
    Assignee: GC CORPORATION
    Inventors: Masaya Seto, Reo Takanohashi
  • Storage container for storing a dental implant fixture
    Patent number: D731169
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: June 9, 2015
    Assignee: GC CORPORATION
    Inventors: Yoshihiro Sakaguchi, Seiko Muraoka, Kinya Nihei
  • Dental dispenser
    Patent number: D750224
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: February 23, 2016
    Assignee: GC CORPORATION
    Inventors: Tatsunosuke Miyano, Takumi Suzuki