Molten Corporation

Chugoku Shiken Kabushiki Kaisha

Kabushiki Kaisha Four Brain

Kyocera Corporation

Kyoto Ceramic Co., Ltd.

Kyocera Kabushiki Kaisha

Four Brain Company Ltd.

Fourbrain Kabushiki Kaisha

Masato Ueno

Takae Kusano

Masanori Hirakiuchi

Mitsuyuki Tasaka

Tatsuro Naito

Masayoshi Sato

A photopolymerization for dental use composed of a light of sources emitting at least visible light and infrared light transparent cells charged with coolant disposed to the emission side of said light source, whereby absorb infrared light; and a board for mounting a formed article which is composed of materials for a pattern made of photopolymerizable resin, impinging the light thereon from the light source after transmitting through said cells, wherein the tranparent cell is composed of disc-like shaped main body having a hollow space therein which is formed integrally with heat resistant glass; and two glass pipes for circulation of coolant which is disposed to the cell main body communicated to the hollow space.

Photopolymerization reactor and small-sized light irradiator for dental

A spacer for elevating occlusion position is composed of a plastic material which can be deformed by occlusion pressure; and a plurality of ball members having a predetermined diameter. The ball member is made of a material which cannot be deformed by subjecting occlusion pressure, and the ball member is embedded in the plastic material so as to be in a plane.

Spacer and mouthpiece for adjusting occlusion

Spacer and mouthpiece for adjusting occulsion

A device for supplying plastic material into a flask under pressure and a flask with the device, which are used for preparation of a denture. The device includes a cylinder having the inside end communicated to a cavity in the flask, a piston slidably inserted in the cylinder, a spring urging the piston toward inside of the flask, a stopper restricting the outside stroke end of the piston, and a device for adjusting elastic force of the spring. The adjusting device preferably includes a spring receiver abutting against the outside end of the spring, a screw-mechanism for moving the spring receiver in the axial direction of the cylinder, and a handle member for operating the screw-mechanism.

Device for supplying plastic material for denture base and flask with

Wax shaping tool

A device for determining optimum jaws position when full denture is prepared, comprising a height adjustable means to be inserted between upper and lower jaws and a means for detecting and indicating biting pressure applied on the height adjustable means. User of the device, e.g. a denter, can precisely determine the optimum jaws position by detecting a position where the maximum biting pressure is obtained by means of the device.

Device and process for determining jaws position

According to the present invention, there is provided for an attachment for a dental prosthesis comprising: (a) a male member made of a rigid material provided at a retentive tooth or a dental root; and (b) a female member provided at the dental prosthesis and facing to the male member, wherein the female member has an elastic part made of an elastic material in order to grip at least an engaging portion of the male member, and the elastic part is formed as one body with an elastic lining layer made of an elastic material and being provided at an inner surface of the dental prosthesis to be in contact with an alveolus ridge. Whereby, the dental prosthesis can be stably and softly supported on the alveolus ridge.

Attachment for dental prosthesis

A wax shaping tool comprising a handle portion, a means for slidably supporting wax rod with a stopper at the front end thereof, a forming spatula portion in front of the handle portion for holding and flowing wax, a wax melter provided on the forming spatula portion, a heater, a wax feed controller for controlling the contact of wax rod with the wax melter by means of controlling the movement of the wax rod supporting means and/or wax rod and/or the stopper and/or the wax melter. The tool enables a wax shaping work to be carried out rapidly and efficiently without a fear of wax degradation, or wax rod deformation.

In casting metals for dental prosthetic use, superior dental castings free from shrinkage cavities can be obtained by delaying the cooling and solidification of molten metal in mold members such as a sprue, runner and gate and, if necessary, a molten metal reservoir into which the molten metal is poured. Such delay in cooling and solidification can be achieved either by forming the sprue and the like from a heat resisting ceramic tubular body or by further forming a heat insulating layer on the outer periphery of the tubular body.

Mold for use in dental precision casting

In accordance with the present invention, there can be provided a denture base for a dental prosthesis comprising a body having an inner surface to be in contact with patient's alveolus ridge; a lining layer covering the inner surface of the body; and an adhesive agent for bonding the lining layer to the inner surface of the body; wherein the body is made of polymethyl methacrylate; the lining layer is made of a rubber-like resilient material comprising an olefin thermoplastic elastomer; and the adhesive agent contains a copolymer comprising an olefin and methyl methacrylate. The denture base has an advantage that adhesive force between the lining layer and the body is strong, and the lining layer has suitable hardness for supporting the dental prosthesis.

Denture base provided with rubber-like resilient lining layer and

In accordance with the present invention, there can be provided a partial dental prosthesis comprising artificial teeth and a denture base holding the artificial teeth, wherein at least one end of the partial dental prosthesis is adjacent to a retentive tooth, which is improved in that a projecting member made of an elastic material is provided at one or two ends of the partial dental prosthesis so as to be closely or elastically in contact with an undercut of the natural tooth. The partial dental prosthesis does not cause natural teeth adjacent to the partial dental prosthesis to be damaged and can be stably and steadily supported on an alveolus ridge of a patient.

Partial dental prosthesis

A dental prosthesis having artificial teeth, a denture base made of a hard polymer material and an elastic lining layer provided on an inner surface of the denture base, comprising (a) a recess portion provided on the elastic lining layer for forming a sealed chamber, (b) a small bore for communicating the sealed chamber with an exterior, (c) a check valve member for exhausting air in the chamber from the recess portion to the exterior, and (d) a member for preventing an alveolar gingiva from projecting into the recess portion. The dental prosthesis can be stably and steadily supported on an alveolus ridge of a patient.

Dental prosthesis and process for preparing the same

A novel method for firmly bonding metal and ceramics comprising the steps of applying a composite plating composition consisting of a metal containing plating solution and fine particles of ceramic on a surface of metal to which the ceramic is to be bonded, thereby forming a metal plating layer on the surface having partially projected fine particles of ceramic, and then firing the coated metal in order to fuse the ceramic thereto.

Method and compositions for bonding metals and ceramics with which to

The present invention primarily relates to an apparatus for improving the efficiency of the waxing-up work mainly in the dental technology. The apparatus comprises a casing which can be held in the palm of the operator's hand, a nozzle member connected to the end of the casing, a means for heating and a means for feeding bar-shaped solid wax which is accommodated in the casing. This apparatus allows the operator to ooze out a proper amount of melted wax required for the waxing-up work from the end of the nozzle member and can solve many problems caused by the conventional method using spatulas.

Growing community of inventors

Hiroshima, Japan

Masato Ueno