Nippon Electric Glass Co., Ltd.

Kyoto University

Ishihara Sangyo Kaisha, Ltd.

Japan Science and Technology Agency

Takehiro Shibuya

Yoshio Hashibe

Takashi Nakamura

Takashi Sakane

Koji Goto

Akira Matsui

Takahiro Matano

Yoshinori Morita

Tokuo Suita

Masayuki Ninomiya

Yoshimichi Ueda

Hiroaki Nishii

Yasuhiro Baba

Masanori Moritake

Akihiko Sakamoto

Kiyoshi Katagi

Tadashi Kokubo

Takao Yamamuro

Kiyoyuki Okunaga

Satoru Yoshihara

Masashi Imamura

Keiichi Kawanabe

Kazuhiro Matsui

Makoto Matsumoto

A bone cement composition which contains titanium dioxide particles having a median diameter of 0.5 to 7.0 &#x3bc;m as measured by a laser diffraction/scattering particle size distribution analyzer and a BET specific surface area of 0.5 to 7.0 m/g as measured by a nitrogen adsorption method, and a base-forming component comprising a (meth)acrylate polymer and a (meth)acrylate monomer, wherein the content of the titanium dioxide particles is 5 to 50% by mass based on the total mass of the composition. The bone cement composition has bioactivity and is capable of forming a hardened material having a high mechanical strength.

Bone cement composition and production method thereof, and kit for producing the same

A bone cement composition which contains large-diameter (meth)acrylate polymer particles having an average particle diameter of 10 to 60 &#x3bc;m, small-diameter (meth)acrylate polymer particles having an average particle diameter of 0.1 to 2.0 &#x3bc;m, a (meth)acrylate monomer and a polymerization initiator, wherein the content of the small-diameter (meth)acrylate polymer particles is 5 to 30% by mass based on the total mass of the small-diameter (meth)acrylate polymer particles and the large-diameter (meth)acrylate polymer particles, and a part or a whole of the small-diameter (meth)acrylate polymer particles are contained in the form of aggregates having an average particle diameter of 30 to 50 &#x3bc;m.

Bone cement composition, bone cement composition kit and forming method of bone cement hardened material

An artificial bone which is excellent in the ability to form bone in a living body, reliably thereof, and has high mechanical strength. The process comprises the steps of: mixing granules, composed of a titanium or a titanium alloy powder and an organic binder, with a particulate pore-forming material, pressure-molding the mixture to obtain a molded body, firing the molded body at 1200&#xb0; C. to obtain a porous body, bringing the porous body into contact with an aqueous alkali solution, subsequently with water of 35&#xb0; C. or higher for a period longer than that of contacting with the aqueous alkali solution and then heating the porous body at 100 to 650&#xb0; C., preferably 200 to 600&#xb0; C.

Artificial bone and method for producing the same

Bioactive cement

A crystallized glass article having a surface pattern like granite, marble or other natural stones with a line pattern of a desired color or colors, which is formed by fusion bonding small masses of a crystallizable glass material mixed with inorganic pigment powder at a heat-treating temperature higher than the softening point. The surface pattern comprises crystallized glass areas defined by the small masses in the surface layer of the article and the colored line pattern defined by the pigment dispersed in the interfaces between adjacent ones of the small masses in the surface layer.

Colored crystallized glass article and method for producing the same

A fire protective glass panel for use in a fire protective window, door, and partition wall, which comprises at least one sheet of fireproof glass plate and a fluorocarbone resin film of a chain molecular structure type bonded to a side surface of the glass plate and which has non-shattering property as well as fire protection property wherein the fireproof glass plate is a heat-resistant and light transparent crystallized glass plate or, alternatively, the fireproof glass plate is a wire glass plate and the fluorocarbone resin film has a thickness of 0.02-1 mm and is made of one of FEP, PFA, PCTFE, ETFE, and PVDF.

Fire-protection and safety composite glass panel

In a crystallized glass article consisting of crystallized glass masses fusion bonded together and having a principal surface, said principal surface having a surface pattern determined by said masses in a surface layer including said principal surface, said small crystallized glass masses in said surface layer are mainly of flaky crystallized glass pieces, each being a relatively large flattened piece, said flaky pieces overlapping one another at random to make said principal surface rough, said crystallized glass masses in another layer adjacent to and fused to said surface layer being considerably smaller than said flaky pieces. The article is produced by preparing flaky pieces and the smaller masses both of a SiO.sub.2 --Al.sub.2 O.sub.3 --CaO crystallizable glass, putting the former pieces on a bottom of a mold to form a flaky-piece layer, then putting the latter masses on the flaky-piece layer to form a small-mass layer, and heat treating the both layers at a temperature higher than a softening point of the crystallizable glass to fusion bond the pieces and masses together as well as crystallizing the glass.

Crystallized glass article having an irregular rough surface pattern and

A crystallized glass article with a colored surface pattern, which comprises a crystallized glass substrate having a surface and small glass masses having a color different from the substrate and dispersed and fusion-bonded in the surface to form the colored surface pattern. The crystallized glass article is produced by depositing and dispersing small glass masses with a color on a surface of a substrate of a crystallizable glass with a different color which can precipitate crystals therein with softening and deforming by heat-treating at a heat treating temperature higher than the softening point of the crystallizable glass, then heating the substrate together with the small glass masses at the heat treating temperature.

Crystallized glass article with colored small masses dispersed in a

A crystallized glass having natural-marble-like surface patterns comprising 45 to 75 wt. % of SiO.sub.2, 1 to 25 wt. % of Al.sub.2 O.sub.3, 1 to 20 wt. % of CaO, 0.5 to 17 wt. % of MgO, 0.1 to 18 wt. % of BaO, 0 to 18 wt. % of ZnO, 1 to 15 wt. % of Na.sub.2 O, 0 to 7 wt. % of K.sub.2 O, 0 to 5 wt. % of Li.sub.2 O, 0 to 10 wt. % of B.sub.2 O.sub.3, 0 to 10 wt. % of P.sub.2 O.sub.5, 0 to 1 wt. % of As.sub.2 O.sub.3, and 0 to 1 wt. % of Sb.sub.2 O.sub.3, substantially free from nucleating agent, in which diopside type crystals are precipitated, and a method of producing the crystallized glass are disclosed.

Crystallized glass having natural-marble-like surface patterns and

A high-mechanical strength biocompatible crystallized glass essentially comprises both crystallines consisting of tetrasilicic fluorine mica series and calcium phosphate series. The crystallized glass has substantially non-sodium oxide and useful in a dental medical care, as repairing material of tooth.

Biocompatible glass ceramics

An infrared transparent glass ceramic article is useful for top plates of cooking stoves and has a black appearance but an infrared transmittance of about 80% or more for an infrared light of a wavelength 1,500 nm, and .beta.-quartz solid solution crystals substantially alone dispersed within glassy matrix without any other crystals. The article consists essentially, by weight, of 60-72% SiO.sub.2, 14-28% Al.sub.2 O.sub.3, 2.5-5.5% Li.sub.2 O, 0.1-0.9% MgO, 0.1-0.9% ZnO, 3-6% TiO.sub.2, 0.03-0.5% V.sub.2 O.sub.5, 0.1-1% Na.sub.2 O, 0-1% K.sub.2 O, 0-2% CaO, 0-2% BaO, 0-2% PbO, 0-2% As.sub.2 O.sub.3, 0-3% ZrO.sub.2, and 0-3% P.sub.d O.sub.5. The article is produced by forming a desired shape of glass article having the ingredients, heating the glass article at a temperature of 650.degree.-800.degree. C. to nucleate in the glass, heating the glass article at a temperature of 800.degree.-950.degree. C. to thereby precipitate .beta.-quartz solid solution crystals alone in the glass, and cooling the article to the room temperature.

Infrared transparent glass ceramic articles with beta-quarts solid

A biocompatible glass ceramic comprises, by weight, 7-16% MgO, 20-45% CaO, 41-50% SiO.sub.2, 8-30% P.sub.2 O.sub.5, 0-5% B.sub.2 O.sub.3, 0-5% F.sub.2, and 0-10% Al.sub.2 O.sub.3, and has a crystal structure where a number of fine crystals of apatite, wollastonite, and diopside are densely dispersed and interlace with one another in a glass phase. The glass ceramic is non-porous and has an increased mechanical strength of 2,000 Kg f/cm.sup.2 without degradation of the chemical bonding with the bone of the living body. The glass ceramic contains no alkali and is chemically stable in the living body. The glass ceramic is useful for replacement materials of tooth roots and crowns as well as bones.

Growing community of inventors

Otsu, Japan

Takehiro Shibuya