Hitachi, Ltd.

Fuji Photo Film Company, Limited

Kuraray Co., Ltd.

Kuraray Noritake Dental Inc.

Okayama University

Fujifilm Corporation

Jgc Catalysts & Chemicals Ltd.

Kuraray Medical Inc.

Junsei Educational Institution

Kurray Medical Inc.

Koichi Okada

Hiroyasu Nishiyama

Takahiro Sekiguchi

Motoki Obata

Hiroshige Ishino

Kei Nakajima

Yasuhiro Yoshida

Kazuomi Suzuki

Akiyori Tamura

Mitsunobu Kawashima

Yamato Nojiri

Kazumitsu Nakatsuka

Keisuke Ohtsuka

Masaki Okubayashi

Takuma Nagase

Junichi Yamauchi

Eiichi Masuhara

Ikuo Omura

Yoshinori Kadoma

Yasuhiko Tsuchitani

Satoshi Imazato

Yusuke Takahata

Shogo Takashiba

Masao Irie

Toshifumi Ozaki

Yoshinobu Sakakibara

Ai Hinamoto

Junichi Ohtsuki

Tomohiro Takahata

Hidehiro Morita

Tadashi Hashimoto

Shigeyuki Ebisu

Naoko Namba

Masato Tanaka

Noriyuki Nagaoka

Masahiro Nagao

Mariko Nakamura

Toshitaka Agano

Satoshi Yamaguchi

Hiroshi Kitaguchi

Nobuyuki Torisawa

Takahiro Tadokoro

Takashi Maruyama

Katsunori Ueno

Shumei Ishihara

Eiichi Tanaka

Akihisa Kaihara

Naoki Nishigaki

Tatsuo Maeda

Yasutaka Kudo

Masahiko Adachi

Hitoshi Kuwabara

Takehiro Kameya

Mariko Sugiura

Shoichi Kosuge

Masanobu Yamada

Miho Harada

Yoshiko Kuboe

Koji Takahashi

Eiichi Terakawa

Yasuji Minami

Yasujiro Ohara

Hirotaka Kita

Yuta Inamura

Makiko Kato

Khairul Matin

Takahiro Itto

Junji Tagami

Toru Nikaido

Hideo Sawada

Kaori Yoshimoto

Yuya Okai

Yoshito Kawazu

Masaru Izumi

Ueno Katsunori

The present invention provides a zirconia sintered body containing a fluorescent agent and having excellent translucency and excellent strength. The present invention also provides a zirconia shaped body and a zirconia calcined body from which the zirconia sintered body can be obtained. The present invention relates to a zirconia sintered body comprising a fluorescent agent, wherein the zirconia sintered body comprises 4.5 to 9.0 mol % yttria, and has a crystal grain size of 180 nm or less, and a three-point flexural strength of 500 MPa or more. The present invention relates to a zirconia shaped body comprising a fluorescent agent, wherein the zirconia shaped body comprises 4.5 to 9.0 mol % yttria, and has a three-point flexural strength of 500 MPa or more after being sintered at 1,100&#xb0; C. for 2 hours under ordinary pressure, and a crystal grain size of 180 nm or less after being sintered at 1,100&#xb0; C. for 2 hours under ordinary pressure. The present invention relates to a zirconia calcined body comprising a fluorescent agent, wherein the zirconia calcined body comprises 4.5 to 9.0 mol % yttria, and has a three-point flexural strength of 500 MPa or more after being sintered at 1,100&#xb0; C. for 2 hours under ordinary pressure, and a crystal grain size of 180 nm or less after being sintered at 1,100&#xb0; C. for 2 hours under ordinary pressure.

Zirconia sintered body containing fluorescent agent

A method for producing a dental mill blank, characterized in that the method includes contacting an inorganic filler molded article produced by subjecting an inorganic filler to press molding and a polymerizable monomer-containing composition, and allowing the polymerizable monomer to polymerize and cure. When the method of the present invention is used, a dental mill blank having a high inorganic powder content and excellent mechanical strength is obtained. In addition, the dental mill blank obtained is suitably used in the fabrication of a dental prosthesis having high mechanical strength and excellent gloss retention, by machining a mill blank using a CAD/CAM system.

Method for manufacturing dental mill blank

A kit for bonding to biological hard tissues, containing a phosphorylated polysaccharide, a polyvalent metal salt other than phosphates, and a solvent. The adhesive composition for biological hard tissues provided by the kit for bonding to biological hard tissues is suitably used in for medical uses, such as cement for bones or dental cement. In addition, since the adhesive composition has excellent bio-absorbability, it is useful as fusion materials for artificial joint prosthesis, fusion materials for spine fracture, fusion materials for extremity fracture, filling materials for bone tumors in the region of orthopedics, filling materials and restorative materials at dental caries-defective sites, luting materials for prosthetic restorative materials such as inlay and crown, pulp-capping and lining materials, implant surface treatment materials, periodontal disease therapeutic materials, hyperesthesia preventive materials, dental pulp capping materials, substrates for DDS, substrates for systems engineering, and tissue bonding materials in the dental region.

Kit for adhering biological hard tissues

A method for inhibiting dentinal hypersensitivity by applying a dentinal hypersensitivity inhibitor on a dentin surface. The dentinal hypersensitivity inhibitor contains at least one tetracalcium phosphate particle, an alkali metal salt of phosphoric acid, and at least one acidic calcium phosphate particle. The tetracalcium phosphate particle has an average particle diameter of 0.5 to 40 &#x3bc;m. The dentinal hypersensitivity inhibitor contains a blended amount of the tetracalcium phosphate particle of 5 to 55 parts by weight relative to 100 parts by weight of a whole amount of the dentinal hypersensitivity inhibitor and a blended amount of the alkali metal salt of phosphoric acid of 1 to 100 parts by weight relative to 100 parts by weight of the tetracalcium phosphate particle.

Method for inhibiting dentinal hypersensitivity

Provided is a measurement unit and measurement method for reducing attenuation due to optical fiber length and SN degradation due to background in a dosage rate monitor that uses optical fiber. This system comprises: a radiation detector for detecting radiation dosage; a light source for irradiating stimulating light on the radiation detector; a photodetector for detecting light generated by the radiation detector; an optical fiber for connecting the photodetector and the radiation detector and light source, and transmitting light from the light source and light from the radiation detector; a measurement unit for counting the pulses outputted from the photodetector; and an analysis unit for extracting the luminous energy originating from the radiation detector, from time information, wave height information, and the count value, which are measurement results obtained by the measurement unit, and converting the luminous energy to a dosage and dosage rate.

Dosage rate measurement system and dosage rate measurement method

A dental composition for oral use, containing a phosphorylated saccharide (a), a polyphosphoric acid and/or a salt thereof (b), and a cationic bactericidal agent (c), wherein a ratio of a total amount of the phosphorylated saccharide (a) and the polyphosphoric acid and/or a salt thereof (b) contained to an amount of the cationic bactericidal agent (c) contained, i.e. {(a)+(b)}/(c), is from 0.05 to 20 in a weight ratio. The dental composition for oral use of the present invention can be suitably used for an oral cavity cleaning agent, including dentifrice agents such as a paste dentifrice agent, a powder dentifrice agent, and a liquid dentifrice agent, a mouse-wash agent, a troche, a tablet, a cream, an ointment, a bonding agent, a mouth spray, a coating agent to tooth surface or a dental prosthetic, a hypersensitive inhibitor, a therapeutic agent for periodontal diseases, that is applied to a periodontal pocket, wet tissue for oral cavity care, an oral refreshing agent, chewing gum, or a gargling agent, or the like.

Dental oral composition

A calcium phosphate composition comprising tetracalcium phosphate particles (A), calcium hydrogen phosphate particles (B) and at least one kind of inorganic particles (C) selected from silica particles or titania particles, wherein the mixing ratio (A/B) of (A) to (B) is from 45/55 to 55/45 in molar ratio, the inorganic particles (C) have an average particle diameter of from 0.002 to 0.5 &#x3bc;m, and the inorganic particles (C) are contained in an amount of 0.1 to 20 parts by weight based on 100 parts by weight of (A) and (B) in total. Thereby provided is a calcium phosphate composition such that when it is used as a material for bone repair, a formed bone has high mechanical strength and a high bone replacement rate is achieved.

Calcium phosphate composition and process for producing the same

Memory management by garbage collection involves a memory area that is allocated in a computer. Data is created in the memory area in accordance with a program executed by a processor of the computer, and it is checked whether or not data necessary to execute the program exists in the memory area to be released, in response to an explicit instruction to release the memory area. As a result of the check, if data necessary to execute the program does not exist in the memory area, the memory area is released. As a result of the check, if data necessary to execute the program exists in the memory area, the data is moved to a memory area different from the memory area to be released.

Memory management method and computer using the method

When a program execution unit of a computer executes a creation instruction of objects utilized by an execution target program in process of executing the execution target program, the program execution unit disposes a created object in an internal heap when a life period of the created object is not contained within life period of objects for root class and gets average value of life time corresponding to set of objects to which the created object belongs with reference to memory allocation information table to dispose the created object as a long-life object in an external heap when the gotten average value of life time is equal to or larger than a predetermined value. Accordingly, life time of objects is measured and long-life objects are not managed by GC, so that program utilizing objects can be executed at high speed.

Memory management method, and memory management apparatus

A dental composition of the present invention includes: a polymerizable monomer component (A); and an amorphous filler (B) having an average particle size of 1 to 20 &#x3bc;m and including silica-based fine particles and coatings of an oxide that cover the surfaces of the silica-based fine particles. The oxide contains a zirconium atom, a silicon atom, and an oxygen atom. The dental composition contains 20 to 500 parts by weight of the filler (B) per 100 parts by weight of the polymerizable monomer component (A). The dental composition has a viscosity of 10 to 800 Pa&#xb7;s. It is preferable that the filler (B) contain spherical particles, and that the percentage of the spherical particles in the filler (B) be at least 60%.

Dental composition and composite resin

A dental composition of the present invention includes: a polymerizable monomer (A); an amorphous filler (B) having an average particle size of 1 to 20 &#x3bc;m and including silica-based fine particles and coatings of an oxide that cover the surfaces of the silica-based fine particles; and inorganic particles (C) having an average particle size of 0.1 to 1.0 &#x3bc;m. The oxide contains a zirconium atom, a silicon atom, and an oxygen atom. It is preferable that the dental composition contain 50 to 400 parts by weight of the filler (B) and 100 to 400 parts by weight of the inorganic particles (C) per 100 parts by weight of the polymerizable monomer (A).

The present invention provides a dental composition exhibiting both an excellent light diffusion property and excellent transparency, and having high mechanical strength and surface smoothness and gloss after polishing as a cured product and good handling properties as a paste. The present invention is a dental composition including: a polymerizable monomer (A); and an amorphous powder (B). The amorphous powder (B) has an average particle size of 1 to 20 &#x3bc;m, and includes silica-based fine particles and coatings of an oxide that cover the surfaces of the silica-based fine particles. The oxide contains a zirconium atom, a silicon atom, and an oxygen atom. The difference in refractive index between the cured product of the polymerizable monomer (A) and the amorphous powder (B) is 0.005 to 0.03.

The present invention provides a memory management method, including the steps of: securing a memory area by a program executed by a computer; storing an object in the memory area in accordance with the execution of the program; bringing the memory area into a release reservation state in accordance with the program instructing the memory area to be released; moving the object to a memory area not to be released while another object in the memory area not to be released and not to be brought into the release reservation state refers to the object in the memory area to be released including the memory area to be brought into the release reservation state; and releasing the memory area to be released.

Memory management method and computer using the same

Growing community of inventors

Kurashiki, Japan

Koichi Okada