Shofu Inc.

Kabushikikaisha Shofu

Satoshi Takano

Toshiyuki Nakatsuka

Shuji Sakamoto

Ryouji Takei

Tsukasa Sasaki

Satoshi Kawahara

Yusei Kadobayashi

Toshio Kitamura

Masanori Goto

Yoshiyuki Jogetsu

Tomohiro Kai

A dental curable composition capable of use as a dental material that can substitute part or all of a natural tooth, in particular, a resin material for dental cutting and machining in the field of dental care. When a block shape usable as the resin material is produced, while mechanical properties and aesthetic properties required for a crown prosthetic appliance are maintained, the dental curable composition can be molded and processed with pressure and heating while strain generated in the block is reduced and no cracks and chipping occur. The dental curable composition includes (a) a polymerizable monomer and (b) a filler in a weight ratio of 10:90 to 70:30, and 0.01 to 10 parts by weight of (c) a polymerization initiator and 0.001 to 1 part by weight of (d) a chain transfer agent being a terpenoid compound based on 100 parts by weight of the polymerizable monomer (a).

Dental curable composition including chain transfer agent

The present invention relates to a dental curable composition that can be suitably used as a dental material that can substitute part or all of a natural tooth, in particular, a resin material for dental cutting and machining in the field of dental care. An object of the present invention is to provide a dental curable composition in which, when a block shape usable as a resin material for dental cutting and machining is produced while mechanical properties such as hardness, bending strength and compressive strength as well as aesthetic property required for a crown prosthetic appliance are maintained, the dental curable composition can be molded and processed with pressure and heating while strain generated in the block is reduced and no cracks and chipping occur. There is provided a dental curable composition including (a) a polymerizable monomer and (b) a filler in a weight ratio of 10:90 to 70:30, and including 0.01 to 10 parts by weight of (c) a polymerization initiator and 0.001 to 1 part by weight of (d) a chain transfer agent being a terpenoid compound based on 100 parts by weight of the polymerizable monomer (a).

Provided is a nozzle mounting structure of a component container by which a nozzle configured to rotate between a first position and a second position may be mounted to a housing without the need for a high processing precision and a high assembly precision. A pair of shaft portions support a body with the nozzle unitarily formed therewith. The nozzle rotates between the first position and the second position. A curved convex surface provided on the body is pressed against a curved concave surface provided on a first bottom wall portion of a housing by a pressing force imparted from a support portion.

Nozzle mounting structure of component container

Provided is a two-component mixing container in which a piston member may be capable of a rotation motion operation and a linear motion operation without the need for a complex guide groove. Two or more spring structure portions are provided at the piston member. The two or more spring structure portions impart a pressing force on an inner wall surface of the third cylindrical portion. Two or more fitting grooves are formed in the third cylindrical portion. In this fitting state, the piston member and a second-component containing member rotate together without contact portions getting out of the fitting grooves. When a force of a predetermined level or higher toward a third bottom wall portion is applied to an operating rod portion with a second-component containing chamber and a mixing chamber being communicable with each other, the contact portions get out of the fitting grooves.

Two-component mixing container including piston using spring engagement

Provided is a two-component mixing container in which a communication passage may be formed between a partition wall member and a second-component containing member without the need for a high processing precision and a high assembly precision. A columnar portion provided at the central portion of a second bottom wall portion of a partition wall member and a circular through hole provided in the central portion of a third bottom wall portion of a second-component containing member are fitted. A first communication passage and a second communication passage are communicated with each other, using a fitting surface formed between the columnar portion and the circular through hole.

Two-component mixing container with communication passage of liquid-tight structure

A chemicals mixing container includes: a cylinder () having a tubular shaped outer tube (), and an end wall () which seals one end of the outer tube; an elastic partition wall () placed inside the outer tube to define a mixing chamber () within the cylinder; and an ejection auxiliary member () placed inside the outer tube and outside the mixing chamber, and which has an end face swollen toward the mixing chamber and moreover which is enabled to press the elastic partition wall against the end wall. The chemicals mixing container is enabled to reliably mix a liquid material and a powder material together and discharge a mixture () of the liquid material and the powder material without waste.

Chemicals mixing container with elastic partition wall

A chemicals mixing container (), which allows two kinds of chemicals, a liquid material () and a powder material (), to be stored therein in isolation from each other and which allows the liquid material () and the powder material () to be mixed together. The mixing container includes: a first cylinder (); a first piston () which is fitted in the first cylinder () to define a first internal space (); a second cylinder () which is connected to the first cylinder () or the first piston () so as to be rotationally slidable thereon; and a second piston () which is fitted in the second cylinder to define a second internal space (). The second cylinder () and the first cylinder () or the first piston () to which the second cylinder () is connected have communicating holes () formed in their mutual sliding surfaces at positions, respectively, eccentric relative to a rotation axis X. The first internal space () and the second internal space () are communicated with or isolated from each other depending on a rotational sliding angle between the second cylinder () and the first cylinder () or the first piston () to which the second cylinder () is connected.

Growing community of inventors

Kyoto, Japan

Satoshi Takano