Tokyo, Japan
Tokyo, Japan

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Patent
GC Corporation and Dental Corp | Date: 2017-02-15

Provided is an artificial tooth that can be unfailingly attached to a denture base in arranging the artificial tooth on the denture base designed and formed with a CAD/CAM, including a convex portion (21a) to be inserted in an internal corner (13a) of a concave portion (13) of the denture base, wherein the convex portion is configured to form a predetermined gap with the internal corner without having contact with the internal corner when inserted in the internal corner.


A tool for obtaining a dental occlusion in an edentulous patient has a main body (1) including a rear curved plate (1a) to be positioned at an intraoral buccal of maxillary and mandibular ridges of the edentulous patient, a front curved plate (1b) to be positioned at extraoral upper and lower lips of the edentulous patient, a connecting part (1c) that connects respective intermediate parts of the rear curved plate (1a) and the front curved plate (1b) along a vertical direction, and a through-hole (1d) that penetrates the rear curved plate (1a), the front curved plate (1b), and the connecting part (1c), wherein a position of the main body (1) is fixed in a state in which the connecting part (1c) is held between the upper and lower lips, and an adjusting shaft (2) inserted into the through-hole (1d), and has one end thereof projecting extraorally from a center between the upper and lower lips, and another end which has a tongue support (2a), thereof intraorally holding a tip end of a tongue, wherein the adjusting shaft (2) adjusts a position of the tongue support (2a) to suppress movement of the tongue when obtaining the dental occlusion.


Patent
GC Corporation | Date: 2017-04-05

Provided is a bite registration tool configured to properly adjust its inclination in taking a bite registration and with which an accurate bite registration can be taken. The bite registration tool includes a rear curved plate that has a curved plate shape and is to be arranged between lips and alveolar ridges of a patient; and a front curved plate that has a plate shape, arranged in a manner that one plate surface faces to the rear curved plate having a predetermined gap, to be arranged forward having contact with the lips, wherein the other plate surface of the front curved plate is provided with at least one ridge protruding and extending in a predetermined direction.


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).


Patent
GC Corporation | Date: 2016-06-22

Provided is an impression tray with which three-dimensional data is easily obtained. An impression tray 1 for holding an impression material to be inserted into an oral cavity for taking an impression, includes: an upper jaw impression tray 10 on which an impression material for taking an impression of an upper jaw side is to be placed; and a lower jaw impression tray 20 on which an impression material for taking an impression of a lower jaw side is to be placed, wherein: the upper jaw impression tray includes an upper jaw impression tray main body 11 including a surface 12a on which the impression material is to be placed; the lower jaw impression tray includes a lower jaw impression tray main body 21 including a surface 22a on which the impression material is to be placed; a handle 17 is attachably and detachably provided on at least either one of the upper jaw impression tray main body and the lower jaw impression tray main body; and the handle, having a posture of attachement, projects from at least any one of a labial side, the upper jaw impression tray excepting the surface on which the impression material is to be placed, and the lower jaw impression tray excepting the surface on which the impression material is to be placed.


Patent
GC Corporation | Date: 2016-07-20

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.


Patent
GC Corporation | Date: 2016-02-03

The problem to be solved is to provide a dental gypsum powder capable of suppressing mixing of bubbles in a kneaded object while including a resin component. A dental gypsum powder includes 0.5 to 4 wt.% of a solid component included in acrylic polymer dispersion; and 0.001 to 0.2 wt.% of cyclic siloxane including 3 to 10 SiO(CH_(3))_(2) units. More preferably, it includes 1 to 3 wt.% of the solid component included in the acrylic polymer dispersion.


Patent
GC Corporation | Date: 2016-02-17

Provided is an impression tray which enables impressions of upper and lower jaws to be taken at the same time, and on which an impression material can be heaped stably and sufficiently. An impression tray (10) that holds an impression material and that is inserted into an oral cavity to take an impression includes an outer frame (21) that curves and extends from a side to be arranged at an incisors side toward a side to be arranged at a molars side, an inner frame (22) that curves and extends with a predetermined distance away from the outer frame, a connecting part (23) that is a linear member that one end of which is fixed to the outer frame and another end of which is fixed to the inner frame, the connecting part keeping a positional relationship between the outer frame and the inner frame, a face material (24) that is spread over the distance between the outer frame and the inner frame, and a handle (30) that is arranged at a face of the outer frame, the face being at the side to be arranged at the incisors side. A portion of the outer frame at the incisors side is formed highest position, height of the portion being kept for no less than 2 mm and no more than 15 mm toward the molars side.


Patent
GC Corporation | Date: 2016-05-31

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.


A scaffold for tissue engineering 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.

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