Kabushiki Kaisha Sangi

Tohoku University

Sangi Co., Ltd.

Tsutomu Ishizaki

Shuji Sakuma

Kiminori Atsumi

Tadayoshi Arakawa

Kazushi Ota

Tsunemoto Kuriyagawa

Hiroyuki Kawamata

Kazushi Ohta

In order to provide a film-forming powder using hydroxyapatite which is a main component of teeth, or hydroxyapatite in which a color tone adjuster is blended, the powder being used in a jet-device for forming a film on a surface of a tooth by spraying the powder on the tooth, and being suitable for forming a film having a high hardness and extremely low solubility in acid in a short period of time, and suitable for forming a film of a powder conforming to the color tone of a tooth in a short period of time; a hydroxyapatite powder calcined in an inert gas atmosphere at 600 to 1350&#xb0; C., a powder obtained by applying to the hydroxyapatite powder calcined at 600 to 1350&#xb0; C. plasma irradiation, or plasma irradiation and mechanical energy, and additionally a film-forming powders obtained by blending color tone adjusters into these hydroxyapatite powders are produced.

Tooth-surface-membrane-forming powder containing sintered apatite

Due to the low suction strength or an unsuitable positional relationship or distance between the suction feed and the oral cavity, conventional extra-oral intake devices exhibit the problem of not being able to fully suck particulate matter and droplets from teeth, shavings from repair products, saliva, bacteria, blood, rinse water, tooth surface cleaning agents, etc., that are dispersed to outside the oral cavity during practice. In order to improve suction strength, the present invention provides an intake device that is equipped with a protruding airflow-regulating member, the top of which is oriented in the direction in which the fluid flows into the opening part of the suction feed, and that can efficiently suck dispersed particulate matter and droplets within a wide range.

Intake device

It is intended to provide a remineralization promoter for tooth enamel and a composition for an oral cavity, which can highly effectively promote the remineralization of tooth enamel and strongly inhibit dental caries. The remineralization promoter for tooth enamel and the composition for an oral cavity are characterized by containing amorphous hydroxyapatite and/or amorphized hydroxyapatite showing two peaks at 2&#x3b8;=31 to 35&#xb0; in X-ray diffraction. The amorphized hydroxyapatite is obtained by reacting calcium salt with phosphate in an aqueous solution and drying the reaction solution at a temperature of 10 to 70&#xb0; C.

Remineralization promoter and composition for oral cavity

A composition for use in dental tissues includes hydroxyapatite having a particle size in a range from about 0.05 .mu.m to about 1.0 .mu.m. The amount of the hydroxyapatite is preferably a minimum of 0.1 percent by weight.

Compositions for dental tissue

A semiconductor circuit means having an electrode of a conductive protein, cytochrome C and/or mitochondria, which is attached to an insulating film of phosphate, especially calcium phosphate, deposited on a substrate of a silicon monocrystal. A small and effective integrated circuit is obtained.

Semiconductor integrated circuit means comprising conductive protein on

A semiconductor integrated circuit comprises a conductive protein electrode, such as cytochrome c, deposited on the surface of an apatite insulating layer such as hydroxyapatite, fluorinated apatite or chlorinated apatite. The apatite insulating layer is thin film coated onto a substrate such that it is substantially C-axis (002) oriented, which allows the integrated circuit to be of small size while minimizing undesired electron transfer between electrodes because the conductive protein electrode adopts the orientation of the apatite insulating film.

Growing community of inventors

Tokyo, Japan

Tsutomu Ishizaki