Patents Assigned to GC Corporation
  • BLOCK FOR DENTAL PROSTHESES
    Publication number: 20220183802
    Abstract: A block for dental prostheses is in the form of a column or a board, a main crystalline phase of the block being of lithium disilicate, and when the block is observed in a field of view of a partially enlarged cross section of the block, the proportion of the total area of crystals having a length of at least 0.5 ?m, the crystals appearing in the field of view, to an area of the field of view is at most 21%.
    Type: Application
    Filed: January 9, 2020
    Publication date: June 16, 2022
    Applicant: GC CORPORATION
    Inventors: Katsuhito KATO, Shigenori AKIYAMA, Toshihiko AZUMA
  • Dental fluoroaluminosilicate glass powder
    Patent number: 11337898
    Abstract: One aspect of the present invention relates to a dental fluoroaluminosilicate glass powder, a 50th percentile volume diameter of which is 5.0 ?m or more and 9.0 ?m or less, and a 10th percentile volume diameter of which is 2.4 ?m or more.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: May 24, 2022
    Assignee: GC Corporation
    Inventors: Ryosuke Yoshimitsu, Yusuke Shimada, Ayaka Fujimoto, Naofumi Matsumoto, Mizuki Nakayama
  • DENTAL FLOSS, CONTINUOUS DENTAL FLOSS, AND METHOD FOR MANUFACTURING CONTINUOUS DENTAL FLOSS
    Publication number: 20220079725
    Abstract: Provided is a dental floss that keeps cleaning performance thereof on one hand, and that is easy to handle because of a high rigid portion thereof on the other hand. Dental floss includes: a floss part that is formed by twisting a plurality of filaments together but not tying up the filaments; and tied-up parts that are provided continuously with the floss part, and are formed by tying up the plurality of the filaments, wherein each of the tied-up parts is formed in such a manner that filaments are covered with a contour part in a cross section thereof.
    Type: Application
    Filed: September 9, 2021
    Publication date: March 17, 2022
    Applicant: GC CORPORATION
    Inventors: Masaru NAKAMURA, Kumiko YOKONUMA, Youko SUDA, Aki SATO
  • Composite for dental pattern resin
    Patent number: 11207245
    Abstract: To provide a composite for a dental pattern resin whose shrinkage when curing and expansion when heated can be both suppressed as its usability is kept, the composite for a dental pattern resin includes a liquid formulation and a powder formulation, wherein the liquid formulation includes a polymerizable monofunctional (meth)acrylate, a polymerizable polyfunctional (meth)acrylate, and a polymerization accelerator, and the powder formulation includes more than 5 mass % of a (meth)acrylate copolymer on the basis of the total powder formulation.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: December 28, 2021
    Assignee: GC CORPORATION
    Inventors: Yoshie Nomura, Kenji Kojima, Tatsuya Fujimoto
  • Method of forming a dental prosthesis
    Patent number: 11191614
    Abstract: A processing machine and a method of using the processing machine to process a block to form a dental prosthesis is provided. The processing machine includes a polishing jig. The polishing jig is for machining tools which makes it possible for a deteriorating machining tool to be used again without detaching the machining tool, with which the processing machine is equipped, from the processing machine. The polishing jig for machining tools comprises an attachment part to be attached to the 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: Grant
    Filed: October 16, 2017
    Date of Patent: December 7, 2021
    Assignee: GC CORPORATION
    Inventors: Go Mashio, Tatsuya Fujimoto, Hayato Yokohara, Tomohiro Hoshino, Toshihiko Azuma
  • Method for producing dental prosthesis, method for producing lithium disilicate blank for dental prosthesis and lithium disilicate blank for dental prosthesis
    Patent number: 11166795
    Abstract: Provided is a block body that makes it possible to quickly produce a dental prosthesis with a good accuracy. A material of the block body including SiO2 in an amount of 60.0 mass % to 80.0 mass %, Li2O in an amount of 10.0 mass % to 20.0 mass %, Al2O3 in an amount of 5.1 mass % to 10.0 mass %, wherein the block body is formed in a column, and a main crystalline phase of the block body is lithium disilicate.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: November 9, 2021
    Assignee: GC CORPORATION
    Inventors: Tomohiro Hoshino, Go Mashio, Tatsuya Fujimoto, Masatoshi Yoshinaga, Hayato Yokohara, Daisuke Ohta
  • Dental photopolymerizable composition
    Patent number: 11135137
    Abstract: According to one aspect of the present invention, a dental photopolymerizable composition includes: a (meth)acrylate compound; a filler; a photopolymerization initiator; and a phthalic acid derivative and/or a thiophene derivative, wherein a content of the phthalic acid derivative and/or the thiophene derivative is greater than or equal to 0.05% by mass and less than or equal to 0.25% by mass.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: October 5, 2021
    Assignee: GC Corporation
    Inventors: Daisuke Takada, Shuji Kariya
  • Method of producing bioabsorbable membrane
    Patent number: 11110204
    Abstract: A method of producing a bioabsorbable membrane includes: forming a liquid membrane by spin-coating a coating liquid containing a first bioabsorbable polymer and a solvent; and forming a dense layer by causing a porous membrane containing a second bioabsorbable polymer to contact the liquid membrane.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: September 7, 2021
    Assignee: GC Corporation
    Inventors: Yuuhiro Sakai, Yusuke Shigemitsu, Kyohei Toyonaga, Hidetoshi Funabashi
  • INTRAORAL EXAMINATION METHOD USING INFORMATION ON BACTERIAL GROUP RELATED TO CLINICAL INDEXES
    Publication number: 20210238659
    Abstract: An intraoral examination method for determining the state of periodontal disease is provided. The method is an intraoral examination method for measuring a signal intensity of a nucleic acid from an oral bacterial group present in an oral sample, calculating an abundance of the bacterial group from a measured value of the signal intensity, and determining the state of periodontal disease using the obtained calculated value as an index, wherein the abundance of the bacterial group shows a correlation between a bacterial load of a bacterial species that increases as a periodontal pocket value increases and a bacterial load of a bacterial species that decreases as a periodontal pocket value increases.
    Type: Application
    Filed: November 2, 2018
    Publication date: August 5, 2021
    Applicant: GC CORPORATION
    Inventors: Naoyuki TOGAWA, Ai HARA, Shinya MURAKAMI, Takenori NOZAKI
  • ROW OF CONNECTED ARTIFICIAL TEETH
    Publication number: 20210220093
    Abstract: To provide a more convenient row of connected artificial teeth which is used for implantation, in this row of connected artificial teeth, a plurality of artificial teeth (11) that are formed of resin are integrally connected, an occlusal face (11a) is formed over one face of each of the artificial teeth, and a hole (12) is provided for at least one of the artificial teeth on an opposite side of the occlusal face, into the hole a coupling member with an artificial tooth root being to be inserted.
    Type: Application
    Filed: June 30, 2017
    Publication date: July 22, 2021
    Applicant: GC CORPORATION
    Inventor: Fumiya SATO
  • OCCLUSAL PRESSURE ANALYSIS PROGRAM
    Publication number: 20210205061
    Abstract: Provided is an occlusal pressure analysis program capable of improving the accuracy of grasping the occlusal contact state in occlusal pressure acquisition by a pressure detection means, including a step of obtaining a pressure value for each minimum unit from which the pressure value can be recognized by a pressure detection means, and a step of, regarding each of the minimum units where the pressure value exists as a detection unit, separating the detection units into the detection units which can be regarded as due to occlusion and the detection units which are unclear whether they are due to occlusion, based on the pressure value.
    Type: Application
    Filed: December 29, 2020
    Publication date: July 8, 2021
    Applicants: THE NIPPON DENTAL UNIVERSITY, GC CORPORATION
    Inventors: Hiroshi SHIGA, Tomohisa SHIRAISHI, Yukie NOGUCHI
  • SCALE
    Publication number: 20210206023
    Abstract: To provide a scale which makes it possible to adjust the temperature of a furnace so that a ceramic blank can be properly heated even if various conditions such as the combination of the used ceramic blank and investment, and the type and size of the furnace vary, the scale comprises: a scale part; and a base part, the scale part and the base part being formed of wax or resin, wherein the base part has a shape of protruding from part of the scale part, a size of the scale part is larger than that of the base part in a direction orthogonal to a protruding direction of the base part.
    Type: Application
    Filed: June 29, 2017
    Publication date: July 8, 2021
    Applicant: GC CORPORATION
    Inventors: Tatsuya FUJIMOTO, Daizaburo MORI, Masatoshi YOSHINAGA, Takuya SATO, Go MASHIO, Hayato YOKOHARA, Tomohiro HOSHINO, Takahiro MIYAKE
  • Dental brace and method for attaching dental brace
    Patent number: 11045284
    Abstract: A dental brace is formed with a bracket main body portion, an opening/closing lid portion, 3a and a tooth abutting plate portion. The tooth abutting plate portion includes, on one surface side, a first surface portion 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, a second surface portion to which the bracket main body portion is adhered, and a charge hole portion is formed which penetrates from the first surface portion to the second surface portion.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: June 29, 2021
    Assignees: KIRISHIMA SEIKO CO., LTD., MEDICAL CORPORATION KYOUJIN-KAI SHIMODA ORTHODONTIC CLINIC, GC CORPORATION
    Inventors: Junichi Nishishige, Tetsuya Shimoda
  • DENTAL HANDPIECE DEVICE
    Publication number: 20210177541
    Abstract: To provide a dental handpiece device that can suppress a case where a drilled face is in a blind spot, and thus cannot be observed, this dental handpiece device includes: a dental handpiece main body; and a dental handpiece imaging device with which the dental handpiece main body is equipped, wherein the dental handpiece imaging device includes: a plurality of camera modules each of which takes an image, to convert the image, which is taken, to an electric signal; and a processing means that receives the electric signal from each of the camera modules, to calculate for generating an image based on the electric signal, and to switch a display of the image, which is taken by each of the camera modules.
    Type: Application
    Filed: June 30, 2017
    Publication date: June 17, 2021
    Applicant: GC CORPORATION
    Inventors: Shunjirou KUME, Takahiro UENOYAMA
  • Dental impression tray
    Patent number: D925043
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: July 13, 2021
    Assignee: GC Corporation
    Inventors: Keiichi Sasaki, Takayuki Michii
  • Interdental brush
    Patent number: D927192
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: August 10, 2021
    Assignee: GC Corporation
    Inventors: Natsumi Mizuno, Norito Inagaki, Kenji Tonegi
  • Interdental brush
    Patent number: D927193
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: August 10, 2021
    Assignee: GC Corporation
    Inventors: Natsumi Mizuno, Norito Inagaki, Kenji Tonegi
  • Interdental brush
    Patent number: D927854
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: August 17, 2021
    Assignee: GC Corporation
    Inventors: Natsumi Mizuno, Norito Inagaki, Kenji Tonegi
  • Dental floss holder
    Patent number: D952259
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: May 17, 2022
    Assignee: GC Corporation
    Inventor: Natsumi Mizuno
  • Dental floss holder
    Patent number: D952260
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: May 17, 2022
    Assignee: GC Corporation
    Inventor: Natsumi Mizuno