Patents Assigned to GC Corporation
  • Patent number: 8585339
    Abstract: For certainly handling a screw member, a screw member 1 includes a male screw 2, and an inner peripheral face of the hole 4 has an engaging recessed part 5 to be engaged with an engaging projected part 11 of a tapered engaging part 10 of a rotary tool 9, and a stepped part 6, said inner peripheral face is parallel or make close to a center axis 7 of the screw member 1 from the head part 3 in a direction of the male screw and from the stepped part 6 in the direction of the male screw, and head part side end edge 8a and an end edge of the stepped part 8b to be engaged with the engaging projected part 11 have an angle of said inner peripheral face being 90±5 degrees with respect to the head part 3 and the stepped part 6.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: November 19, 2013
    Assignee: GC Corporation
    Inventor: Yusuke Ishikawa
  • Patent number: 8562347
    Abstract: A dental implant has a dental implant fixture with a fitting hole at the oral cavity-side end, and an abutment with a fitting portion at one end which is to be fitted, not to be rotatable, in the fitting hole in the dental implant fixture. The dental implant fixture has at a side of the fitting hole opposite to the oral cavity an internal thread with which external threads formed on a cover screw and healing abutment are to be put into engagement. The abutment has a truncated-conical gum piercing portion with a cross section which is larger in area as it goes away from the fitting portion, and a columnar portion which is not circular in cross section and to which a dental prosthesis fixing device is to be attached. The fitting portion has an internal thread smaller in inside diameter than that in the dental implant fixture.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: October 22, 2013
    Assignee: GC Corporation
    Inventor: Yuki Sakamoto
  • Patent number: 8551410
    Abstract: The present invention provides a photopolymerization device which allows a space irradiated with a light to have a high temperature while inhibiting a temperature rise of a light source used for the space. The photopolymerization device comprises: a housing; a polymerization space which is surrounded by a wall in the housing and in which polymerization is carried out; a light-emitting diode light source which irradiates a light for polymerization into the polymerization space; and a temperature control device which heats inside the polymerization space, wherein the light-emitting diode light source is arranged outside the polymerization space.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: October 8, 2013
    Assignee: GC Corporation
    Inventors: Yukie Noguchi, Kazuhisa Kashiwabara
  • Publication number: 20130260331
    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: Application
    Filed: March 29, 2013
    Publication date: October 3, 2013
    Applicant: GC Corporation
    Inventors: Hidefumi MARUMORI, Hiroshi Kamohara
  • Publication number: 20130230824
    Abstract: The invention provides a plastic impression tray for a lower jaw having an outer wall, an inner wall and a bottom portion and forming a U-shaped flat surface. A rim with a particular height is provided along each of upper ends of the outer wall and the inner wall, through holes with particular widths are provided with a particular relationship between the distance between the adjacent through holes and a width of the through hole, circular through holes with particular diameters are provided between the through holes in the bottom portion, and bottom portion through holes with particular widths and lengths are provided on a line connecting the bottom portion sides of the through holes which are positioned at the closest side to the end portion of the U-shaped portion in the end portion thereof, or in a closer side to the end portion than the line, respectively.
    Type: Application
    Filed: March 1, 2013
    Publication date: September 5, 2013
    Applicant: GC Corporation
    Inventors: Hidefumi MARUMORI, Hiroshi Kamohara
  • Patent number: 8518432
    Abstract: A block-shaped scaffold for a tissue engineering with improved shape stability and less volume change in water is produce by the steps of approximate-uniformly mixing the particle-shaped material having 100 to 2000 ?m diameter with a solution, where a biodegradable polymer is dissolved with an organic solvent, freezing, drying it to remove the solvent, pulverizing thus obtained intermediate product, dissolving it with a liquid, where the biodegradable polymer is not dissolved, to remove the particle-shaped material taking thus obtained intermediate product into a mold, and pressing and heating it, the scaffold having ununiform and continuous holes occupying 20 to 80% in a cross-section area in a three-dimensional network structure having a small hole structure with 5 to 50 ?m diameter, elastic coefficient being 0.1 to 2.5 MPa, and volume change being 95 to 105% when dipping it in water for 24 hours.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: August 27, 2013
    Assignee: GC Corporation
    Inventors: Katsushi Yamamoto, Katsuyuki Yamanaka, Youko Suda, Tadashi Kaneko
  • Publication number: 20130180870
    Abstract: A packaging container is constructed by a packaging container main body with a lid portion, and a label adhered to an upper surface of the packaging container main body. An accommodating portion main body of the packaging container main body has a first flange portion around an accommodating portion, and second flange portions positioned at right and left side ends of the first flange portion and extending in an outward direction from an upper end of each of step portions having the same height as a thickness of the lid portion. Further, an engagement concave portion engaging with an engagement portion of the lid portion is formed in a front portion in the center of the first flange portion, and the label is adhered to upper surfaces of the lid portion and the second flange portions to seal the container main body, and is unsealed by a cut line.
    Type: Application
    Filed: January 17, 2013
    Publication date: July 18, 2013
    Applicant: GC Corporation
    Inventor: GC Corporation
  • Publication number: 20130101778
    Abstract: To provide a most suitable block body for producing a denture base used when producing a denture base by cutting, the block body for producing a denture base is produced by polymerizing a (meth)acrylate monomer so as to have a color tone within a range that L* is 40 to 55, a* is 14 to 31, and b* is 5 to 20 when the color tone is measured with a sample thickness of 4 mm based on JIS Z8729, and to be preferably in a cylindrical shape having a diameter of 8 to 15 cm and a height of 1.5 to 5 cm, or in an elliptical-cylindrical shape having a major diameter and minor diameter of 8 to 15 cm and a height of 1.5 to 5 cm.
    Type: Application
    Filed: April 25, 2011
    Publication date: April 25, 2013
    Applicants: National University Corporation Tokyo Medical and Dental University, GC Corporation
    Inventors: Shunsuke Minakuchi, Manabu Kanazawa, Muzuki Nakayama, Tomohiro Kumagai
  • Patent number: 8420712
    Abstract: To provide a silicone impression material having high viscosity of a kneaded material before curing and low hardness after curing. A dental silicone impression material composition includes: A) an organopolysiloxane mixture comprising a) an organopolysiloxane having at least two aliphatic unsaturated hydrocarbons in one molecule and having viscosity of 1,000,000 mPa·s or more at 25° C., and b) an organopolysiloxane having at least one aliphatic unsaturated hydrocarbon in one molecule and having viscosity of 100 to 5,000 mPa·s at 25° C., wherein a ratio of a):b) is 1:0.5 to 10; B) an organohydrogenpolysiloxane having at least three hydrogen atoms directly bonded to a silicon atom in one molecule; C) a silicone-soluble platinum compound; D) an organopolysiloxane not having a functional group; and E) an inorganic filler.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: April 16, 2013
    Assignee: GC Corporation
    Inventors: Hiroshi Kamohara, Shouichi Fukushima
  • Patent number: 8403670
    Abstract: A method for creating three-dimensional data of a position of an outer periphery at the occlusal surface side of a keeper includes steps of placing a keeper analog having a reference plane in same shape as and in parallel to a surface at the occlusal surface side of a keeper to be embedded projectingly on an abutment model, three-dimensionally measuring an outside shape of the abutment model having the keeper analog, acquiring a normal vector and an outer periphery of the reference plane based on the measured three-dimensional data, moving the outer periphery to a position at the abutment model side by a height of the keeper analog from the reference plane along the normal vector and acquiring three-dimensional data of the outer periphery based on the position.
    Type: Grant
    Filed: December 31, 2009
    Date of Patent: March 26, 2013
    Assignee: GC Corporation
    Inventor: Yoshinori Matsuda
  • Publication number: 20130034826
    Abstract: Provided is an intraoral inspection apparatus for dental use capable of distinguishing and detecting more kinds of diseased sites etc. with one apparatus. The apparatus comprises: a light source unit provided with color-producing light sources capable of inducing fluorescent lights from diseased sites; a wavelength adjusting device provided with a first filter that transmits, among the fluorescent lights, a light having a wavelength of a fluorescent light from a predetermined diseased site and blocks or attenuates a light having a wavelength other than this, and provided with a second filter that transmits, among the fluorescent lights, a light having a wavelength of a fluorescent light from a diseased site different therefrom and blocks or attenuates a light having a wavelength other than this; and an imaging device which receives the fluorescent lights transmitted through the first filter and the second filter, and converts them into electrical signals.
    Type: Application
    Filed: July 30, 2012
    Publication date: February 7, 2013
    Applicant: GC Corporation
    Inventors: Laurence J. WALSH, Mitsuaki TAKADA, Takao SHINJO
  • Patent number: 8367745
    Abstract: To provide a dual curing type composite resin for core build-up having improved curing property by chemical polymerization with improved mechanical strength of a cured body under the condition of no light irradiation and with a shortened setting time, the composite resin is composed of a first component including a (meth)acrylate polymerizable resin and an organic peroxide, and a second component including (meth)acrylate polymerizable resin and a reducing agent, a photopolymerizaton initiator and a filler are included in the first component and/or the second component, and oxide powder of a Group II element in the periodic table having an average particle diameter of 1 ?m or less is blended in the first component and/or the second component.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: February 5, 2013
    Assignee: GC Corporation
    Inventors: Yugo Kosaka, Yutaka Shinozaki, Tomohiro Kumagai
  • Patent number: 8360775
    Abstract: For proper fitness of a core portion of an abutment to a patient, a wax model base for an abutment of a dental implant includes an engagement portion 1 engaging with an implant fixture analog embedded in a gypsum model without rotation, a truncated conical portion 2, a building portion 4 provided directly on an inner peripheral edge of a ring-like first stepped portion 3, which is provided on an oral cavity inner side of the truncated conical portion 2, or through a cylindrical portion 4a having a low height to have a conical shape expanding toward the oral cavity inner side and have a cutoff portion 5 on an outer peripheral surface, a cylindrical portion 7 provided on an inner peripheral edge of a ring-like second stepped portion 6 provided on the building portion 4, and a screw hole 8 along a center axis of the base.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: January 29, 2013
    Assignee: GC Corporation
    Inventors: Takamitsu Takagi, Yusuke Noguchi, Fumiya Sato, Tsuyoshi Noguchi, Ryosuke Ikeya, Yoshihiro Sakaguchi
  • Patent number: 8350842
    Abstract: Designing of a coping for proper working is made possible. Based on three-dimensional data on a model of an abutment tooth to which a dental prosthesis is applied stored in RAM (Random Access Memory) and on three-dimensional position information about a margin line of the model stored in another RAM, on a face containing a reference axis of the model, three-dimensional position information about a side face of a coping is determined so that a specified angle is formed between a margin line and a surface of the model and three-dimensional position information about the side face of the coping on each of a plurality of different faces containing the reference axis over an entire circumference in a direction surrounding the reference axis is detected by a coping processing section.
    Type: Grant
    Filed: February 14, 2007
    Date of Patent: January 8, 2013
    Assignee: GC Corporation
    Inventors: Tsutomu Shibata, Yoshinori Matsuda
  • Publication number: 20120225403
    Abstract: The present invention provides a stand for a dental technical material which is capable of increasing flexibility and reducing difficulty in arranging a dental model. The stand for a dental technical material, for attaching thereto a dental model holding a dental technical material, the dental model being provided with a pin, comprises a body; the body is provided with a holding device which holds the pin; and the holding device is deformable.
    Type: Application
    Filed: February 23, 2012
    Publication date: September 6, 2012
    Applicant: GC Corporation
    Inventors: Yukie NOGUCHI, Takao SHINJO
  • Publication number: 20120214132
    Abstract: To provide a dental implant abutment made of titanium, which is mounted on the intraoral side of a dental implant fixture embedded in a jawbone and coming to be an artificial tooth root, penetrates through gingiva, and comes to be a base of an upper structure. The dental implant abutment does not remarkably impair aesthetic property even when the intraoral portion of the dental implant abutment is seen through gingiva. The surface of the dental implant abutment made of titanium is colored to have the value of L* within a range from 40 to 44, the value of a* within a range from 21 to 40 and the value of b* within a range from ?20 to 10, which are represented by L*a*b* color system.
    Type: Application
    Filed: February 22, 2012
    Publication date: August 23, 2012
    Applicant: GC Corporation
    Inventors: Akio TAKAHASHI, Go Mashio, Shogo Yamamoto
  • Patent number: D684724
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: June 18, 2013
    Assignee: GC Corporation
    Inventors: Kaori Tokui, Kumiko Yokonuma
  • Patent number: D686327
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: July 16, 2013
    Assignee: GC Corporation
    Inventors: Hidefumi Marumori, Hiroshi Kamohara
  • Patent number: D686732
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: July 23, 2013
    Assignee: GC Corporation
    Inventors: Hidefumi Marumori, Hiroshi Kamohara
  • Patent number: D686733
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: July 23, 2013
    Assignee: GC Corporation
    Inventors: Hidefumi Marumori, Hiroshi Kamohara