Patents Assigned to GC Corporation
  • Two-paste polymerizable compostion
    Patent number: 9844494
    Abstract: Provided is a polymerizable composition hardly having oxygen inhibition layer by polymerization under an oxygen environment, including a first paste including (a) a (meth)acrylate compound, (b) at least one of an aromatic sulfinic acid and a salt thereof, and (c) an acidic compound; and a second paste including (a) a (meth)acrylate compound, (d) an organic metal compound, and (e) an organic halogen compound, wherein at least either one of the first paste and the second paste includes (f) a filler.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: December 19, 2017
    Assignee: GC CORPORATION
    Inventors: So Ishizuka, Naofumi Matsumoto
  • Method of fabricating scaffold for tissue engineering
    Patent number: 9795710
    Abstract: A method of fabricating a scaffold for tissue engineering that includes a frame structure including one of poly-D-lactic acid and poly-L-lactic acid and a coating layer formed on a surface of the frame structure and including a lactic acid-glycolic acid copolymer. The method includes mixing a first granular porous substance including one of poly-D-lactic acid and poly-L-lactic acid with a second granular porous substance including the lactic acid-glycolic acid copolymer to prepare a mixture, and pressurizing and heating the mixture in a mold. In the heating, the mixture is heated to a temperature greater than or equal to the melting point of the lactic acid-glycolic acid copolymer and less than the melting point of one of poly-D-lactic acid and poly-L-lactic acid.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: October 24, 2017
    Assignee: GC Corporation
    Inventors: Katsuyuki Yamanaka, Yuuhiro Sakai, Yusuke Shigemitsu
  • METHOD FOR MANUFACTURING DENTAL PROSTHESIS
    Publication number: 20170296311
    Abstract: An object of the present invention is to provide a method for manufacturing a dental prosthesis capable of properly arranging a dental reinforcement when a dental prosthesis made of resin where the dental reinforcement is arranged is manufactured. The method includes turning information on an intraoral shape into data: designing, in a form of data, a shape of a resin body that is a part formed of resin based on the data; designing, in the form of data, a position of a dental reinforcement that is to be arranged inside the resin body; and forming, in the form of data, a space and an opening that communicates with an outside in the position in the resin body where the dental reinforcement are to be arranged, based on the position, to design a resin body with an opening.
    Type: Application
    Filed: September 25, 2015
    Publication date: October 19, 2017
    Applicant: GC CORPORATION
    Inventors: Takayuki UENO, Shuntaro URATA
  • Dental syringe
    Patent number: 9775685
    Abstract: A dental syringe that facilitates the expulsion of air from a syringe body when dental material is injected into the syringe body from a discharge port of the syringe body and the discharge of the dental material from the syringe body during use for treatment. The syringe includes a syringe body, a plunger, and an O-ring that is mounted in an engagement groove formed at a front end portion of the plunger. The engagement groove includes a shallow groove at the front end side and a deep groove at the rear end side. When the dental material is injected into the syringe body, the O-ring engages with the shallow groove, and when discharging the dental material, the O-ring engages with the deep groove.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: October 3, 2017
    Assignee: GC Corporation
    Inventors: Fumiko Suzuki, Tatsunosuke Miyano
  • POLYMERIZATION APPARATUS FOR DENTAL TECHNIQUE
    Publication number: 20170252138
    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: Application
    Filed: September 8, 2015
    Publication date: September 7, 2017
    Applicant: GC CORPORATION
    Inventors: Yukie NOGUCHI, Mitsuaki TAKADA
  • METHOD FOR MANUFACTURING CALCIUM CARBONATE BLOCK
    Publication number: 20170210635
    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: Application
    Filed: September 29, 2015
    Publication date: July 27, 2017
    Applicants: GC CORPORATION, KYUSHU UNIVERSITY, National University Corporation
    Inventors: Kunio ISHIKAWA, Katsushi YAMAMOTO
  • Dental ultrasonic cleaning device and method for cleaning teeth or dentures by using ultrasonic waves
    Patent number: 9700394
    Abstract: Provided is a dental ultrasonic cleaning device that efficiently cleans teeth or dentures in an oral cavity using ultrasonic waves. A dental ultrasonic cleaning device 1 emits ultrasonic waves through a cleaning-liquid (W1) to the surface of a cleaning-target 26, ultrasonically cleaning it. An ultrasonic horn 24 propagates ultrasonic waves being generated by an ultrasonic-wave transducer 23 and emits them from the vibratory surface 25 provided at the tip-end of the horn 24. A liquid-reserving part 27 is provided, surrounding the vibratory surface 25 of the ultrasonic horn 24, which temporarily reserves the cleaning-liquid (W1) between the vibratory surface 25 and the cleaning-target 26. A cap-member 33 is provided at a certain interval opposite the liquid-reserving part 27.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: July 11, 2017
    Assignees: SHOWA UNIVERSITY, HONDA ELECTRONICS CO., LTD., GC CORPORATION
    Inventors: Matsuo Yamamoto, Takashi Takiguchi, Masanori Sato, Katsuyuki Inagaki, Kazumasa Kubota, Hideo Kozaka, Toshiaki Miyamoto
  • Method for producing dental prosthesis, method for producing lithium disilicate blank for dental prosthesis and lithium disilicate blank for dental prosthesis
    Patent number: 9700392
    Abstract: Provided is a method for quickly producing a dental prosthesis with a good accuracy. The method for producing a dental prosthesis including: a melting step of melting a material including no less than 60.0 mass % and no more than 80.0 mass % of SiO2, no less than 10.0 mass % and no more than 20.0 mass % of Li2O, and no less than 5.1 mass % and no more than 10.0 mass % of Al2O3; a glass blank production step of cooling to solidify the molten material to obtain a glass blank; a lithium disilicate blank production step of heating the glass blank to obtain a lithium disilicate blank whose main crystalline phase is lithium disilicate; and a processing step of processing the lithium disilicate by machining.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: July 11, 2017
    Assignee: GC CORPORATION
    Inventors: Tomohiro Hoshino, Go Mashio, Tatsuya Fujimoto, Masatoshi Yoshinaga, Hayato Yokohara, Daisuke Ohta
  • Dental block
    Patent number: 9610146
    Abstract: A dental block includes a block body having a one surface, and an engagement portion to be engaged with a dental implant fixture. The engagement portion has a bolt through hole and is formed in the one surface of the block body. The dental block further includes a ring-shaped abutment surface to be abutted against a top surface on the oral cavity inner side of the dental implant fixture. The ring-shaped abutment surface is positioned more inside the block body than the one surface and is formed from an end portion positioned at the most oral cavity inner side of the engagement portion to surround the end portion, and to be parallel to the one surface of the block body. The dental block further includes a diameter-enlarged portion having a tapered shape whose diameter increases from the ring-shaped abutment surface toward the one surface of the block body.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: April 4, 2017
    Assignee: GC Corporation
    Inventors: Yasuhiro Odanaka, Yuki Sakamoto
  • Flow-type ultrasonic oral cavity washing device
    Patent number: 9579174
    Abstract: This invention is achieved to provide a water-flow ultrasonic oral-cavity cleaning device. In the water-flow ultrasonic oral-cavity cleaning device (1), cleaning liquid (W1) from a cleaning-liquid supplying device (2) is supplied into a transducer case (21) through a supply port (26). Ultrasonic waves (S1) are propagated into the cleaning liquid W1 from an ultrasonic transducer (22) mounted in a transducer mounting part (23) inside the transducer case (21). The water-flow of the cleaning liquid (W1) is collected at the apical-part inside the transducer case (21), and then emitted from the issue (27) into the oral cavity, wherein power supply of 100W or less is supplied to the ultrasonic transducer (22) of 50 mm or less in diameter to propagate the ultrasonic waves (S1) of 100 kHz or more to 3 MHz or less in frequency into the cleaning liquid (W1).
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: February 28, 2017
    Assignees: SHOWA UNIVERSITY, HONDA ELECTRONICS CO., LTD., GC CORPORATION
    Inventors: Matsuo Yamamoto, Takashi Takiguchi, Masanori Sato, Kengo Uemura, Tomomi Hikida, Katsuyuki Inagaki, Hideo Kozaka, Toshiaki Miyamoto
  • Scanning jig
    Patent number: 9549790
    Abstract: Provided is a scanning jig capable of improving replacement accuracy of three-dimensional data. Provided is a scanning jig 10 for attaching to an analog 20 embedded in a model or to an artificial tooth root 30 embedded inside an oral cavity, the scanning jig including: a main body 11 formed in a bottomed cylindrical shape provided with a bottom to one end portion; a fixation member 12 of which one end side is inserted inside the cylindrical shape of the main body and the other end side is fixated to the analog or the artificial tooth root; and a magnet 13 arranged inside the cylindrical shape of the main body, wherein the main body is not provided with a hole or a groove on one end surface on a bottom side of the bottomed cylindrical shape, and the end surface is provided with an inclined surface.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: January 24, 2017
    Assignee: GC CORPORATION
    Inventors: Katsuya Mori, Naoto Fujii
  • OCCLUSION MEASUREMENT DEVICE AND METHOD FOR DETECTING OCCLUSAL FORCE
    Publication number: 20160338812
    Abstract: An information processing device (104) performs integration processing for each intersection point for raw data outputted from an occlusal force detecting device having a sensor sheet (102) which uses an organic piezoelectric film (201), to create occlusal force data, wherein the raw data includes address information of each intersection point and data obtained based on a signal indicating a change in occlusion force.
    Type: Application
    Filed: January 21, 2015
    Publication date: November 24, 2016
    Applicants: MOTT LLC, GC CORPORATION
    Inventor: Mutsuo OGAWA
  • Full denture base manufacturing method
    Patent number: 9498310
    Abstract: A full denture base manufacturing method is provided that can easily manufacture a full denture base, using a set of maxillary impression tray and a mandibular impression tray for taking an impression from a patient including an edentulous patient.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: November 22, 2016
    Assignee: GC Corporation
    Inventors: Takeo Suga, Masataka Itoda, Hideaki Yasaki, Yasuhiro Yokoyama, Shuichi Nomura, Hiroshi Kamohara
  • Impression tray set for edentulous jaw
    Patent number: 9433483
    Abstract: An impression tray set for edentulous jaw is formed by a maxillary impression tray and a mandibular impression tray respectively including a tray main body having a U-shaped groove on which an impression material is to be applied on a front surface thereof, an engaging part formed on a back surface of the U-shaped groove in a position corresponding to an alveolar ridge of front teeth, and a handle part detachably connected to the engaging part. Each of the maxillary and mandibular impression trays includes projecting parts provided on the back surface at portions corresponding to an alveolar ridge from a first molar part to a premolar part. The projecting parts determine bite position and height in a state in which at least a part of flat top surfaces of the projecting parts contact each other when taking an impression.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: September 6, 2016
    Assignee: GC Corporation
    Inventors: Takeo Suga, Masataka Itoda, Hiroshi Kamohara
  • Dental gypsum powder
    Patent number: 9408783
    Abstract: Provided is a dental gypsum powder having flowability, setting time, and strength of a set material that are suitable for producing a dental model. The dental gypsum powder contains 100 parts by weight of gypsum hemihydrate, 2 to 4 parts by weight of gypsum dihydrate, from 0.5 to 3 parts by weight of potassium sulfate, from 0.05 to 0.8 parts by weight of a polycarboxylate water reducing agent, and not contain more than 0.3 parts by weight of other additives. It is preferred that the amount of the polycarboxylate water reducing agent is from 0.15 to 0.3 parts by weight per 100 parts by weight of gypsum hemihydrate, and the amount of the potassium sulfate is from 25% by weight to the same amount of the amount of the gypsum dihydrate.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: August 9, 2016
    Assignee: GC CORPORATION
    Inventors: Daizaburo Mori, Emiko Fukushima, Haruhiko Horiuchi
  • POLYMERIZABLE COMPOSITION AND KIT FOR POLYMERIZABLE COMPOSITION
    Publication number: 20160213577
    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: Application
    Filed: September 11, 2014
    Publication date: July 28, 2016
    Applicant: GC CORPORATION
    Inventors: Naofumi MATSUMOTO, So ISHIZUKA, Mika WAKO
  • Dental mixer
    Patent number: 9381070
    Abstract: To provide a dental mixer capable of easily, certainly locking a mixing tip to a syringe body, easily removing the mixing tip, and thereby having easy handling property. The dental mixer includes a syringe body 1 and a sleeve 3. The mixing tip 2 includes a housing 2a, a paste guiding member 2b and a plate spring-shaped locking members 2c and 2c. The plate spring-shaped locking members 2c and 2c have pawl portions 2ca and 2ca on the tip-end side thereof, and the pawl portions 2ca and 2ca are locked, by elasticity, with locking grooves 1c and 1c between the syringes 1a and 1a. The sleeve 3 has a shape to cover at least the pawl portions 2ca and 2ca when sliding toward the outlet side of the housing 2a, and thereby to prevent the locking of the pawl portions 2ca and 2ca by elasticity from canceling.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: July 5, 2016
    Assignee: GC CORPORATION
    Inventors: Tatsunosuke Miyano, Kazuma Noguchi
  • Orthodontic bracket
    Patent number: 9351811
    Abstract: Provided is an orthodontic bracket that is capable of a more effective motion on the tooth surface. The orthodontic bracket includes a substrate surface that is bonded to the tooth surface and an arch wire retaining portion that is configured to retain an arch wire with the substrate surface as a bottom surface, the orthodontic bracket being connected by the arch wire and continuously applying a stress to individual teeth to thereby straighten a row of teeth, wherein the orthodontic bracket is in an approximately cambered cross-sectional shape that is orthogonal to the direction in which the arch wire is stretched with the substrate surface bonded to the tooth surface as the bottom surface, and is provided with a plurality of arch wire through holes respectively for inserting the arch wires into the holes and connecting adjacent orthodontic brackets by the arch wires.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: May 31, 2016
    Assignee: GC Corporation
    Inventor: Koutaro Maki
  • Capsule for tooth restorative material
    Patent number: 9326829
    Abstract: To prevent a bursting sound generated when a mixed and kneaded material obtained by mixing and kneading predetermined amounts of a powder component and a liquid component in a capsule for a tooth restorative material is administrated to a position to be restored in a patient's tooth, the capsule is structured such that a protrusion portion (4c) having its inner end positioned slightly inside an outer periphery of a circular hole of a first opening forming portion (1b) is provided on a rear end portion of a nozzle (4) in such a manner as to be positioned at a position which is in the vicinity of the first opening forming portion (1b) to form the circular hole for an outlet of a mixed and kneaded material (C) of a powder component storing cup (1) and is away from at least a hinge portion of the circular hole.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: May 3, 2016
    Assignee: GC Corporation
    Inventors: Shinichi Kojima, Masayuki Takahashi, Tomohiro Uchida
  • Dental applicator
    Patent number: D808523
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: January 23, 2018
    Assignee: GC Corporation
    Inventors: Takeshi Ikuhara, Atsushi Tokumura, Soichi Yamamoto, Shinichi Kojima