Patents Assigned to Tokuyama Dental Corporation
-
Publication number: 20120006709Abstract: A container which is not bulky at the time of shipping and can be stably stood on a suitable place. The container includes a lid member for closing a take-out opening (brittle portion) of the container body 2. On the lower outer side of the container body, there are formed slits for fitting the lid member to the container body after the container body and the lid member are separated apart, and auxiliary leg portions that protrude outward of the container body. The lid member is forming holding leg portions that protrude outward therefrom. Wing portions of the holding leg portions are inserted in the slits to fit the lid member to the container body, and the erected attitude of the container body is supported by the holding leg portions.Type: ApplicationFiled: September 20, 2011Publication date: January 12, 2012Applicant: Tokuyama Dental CorporationInventors: KOJI MATSUSHIGE, Masayuki Aizawa, Nobutoshi Yamaguchi, Ayumi Dodomi
-
Publication number: 20110288195Abstract: Provided is a filling/restoring material, including a photopolymerization initiator of a quaternary system formed by combining an ?-diketone compound, an aliphatic amine compound, an aromatic amine compound, and a photoacid generator, in which even when the filling/restoring material is filled and cured on a cured layer of a dental adhesive material including a radical-polymerizable monomer having an acidic group, the filling/restoring material undergoes sufficient curing up to a contact interface between the filling/restoring material and the cured layer, thereby providing high adhesive strength stably.Type: ApplicationFiled: February 3, 2010Publication date: November 24, 2011Applicant: TOKUYAMA DENTAL CORPORATIONInventors: Mihoko Kajikawa, Takeshi Suzuki
-
Publication number: 20110172323Abstract: Disclosed are photopolymerizable compositions suitable for uses such as dental composite resins, and that comprise (A) a radical-polymerizable monomer, (B) a photopolymerization initiator that comprises (B1) an ?-diketone compound, (B2) a photoacid generating agent, (B3) an aromatic amine compound, and (C) an organic filler containing a phthalate ester fluorescent agent.Type: ApplicationFiled: May 20, 2009Publication date: July 14, 2011Applicant: TOKUYAMA DENTAL CORPORATIONInventors: Hironobu Akizumi, Junichiro Yamagawa
-
Publication number: 20110098375Abstract: [Problems] A dental adhesive composition containing an acid group-containing polymerizable monomer, that can be used as a dental adhesive material or a primer. The dental adhesive composition has excellent durability of adhesion exhibiting further improved adhering strength and durability of adhesion enabling teeth to be more strongly adhered to a composite resin or a prosthetic over extended periods of time. [Means for Solution] The dental adhesive composition contains a polymerizable monomer and ions of an element of the Group IV as basic components, at least 10 mass % of the polymerizable monomer being a polymerizable monomer having a hydrogenphosphate diester group, such as bis(2-methacryloyloxyethyl)hydrogenphosphate or 2-methacryloyloxyethylphenyl hydrogenphosphate, and the content of ions of the element of the Group IV such as titanium ions or zirconium ions in the composition being 0.1 to 1.Type: ApplicationFiled: July 22, 2009Publication date: April 28, 2011Applicant: Tokuyama Dental CorporationInventors: Hidetoshi Gyakushi, Takeshi Suzuki, Mihoko Kajikawa, Hideki Kazama
-
Patent number: 7906565Abstract: A mucosal adjustment material comprising a combination of a powdery material (a) and a liquid material (b), characterized especially in that a noncrosslinked (meth)acrylic polymer powder having a Tg in the range of 0-60° C., e.g., polybutyl methacrylate, is used as the powdery material and a liquid polymer which has a mass-average molecular weight of 1,000-10,000 and in which the content of oligomers having a molecular weight of 500 or lower is 10 mass % or lower is used as the liquid material. Such powdery material and liquid material are kneaded together to prepare a paste, which is applied to a denture base and used as a temporary relining material. This mucosal adjustment material in a paste form is reduced in the amount of ingredients eluted from the material during use in the mouth. In an ordinary use period, the relining material retains its initial flexibility and does not deteriorate the denture base.Type: GrantFiled: February 2, 2006Date of Patent: March 15, 2011Assignees: Tokuyama Corporation, Tokuyama Dental CorporationInventors: Masanao Hashiguchi, Mitsuhiro Yamashita, Hideki Kazama
-
Publication number: 20100304961Abstract: [Problems to be Solved] To provide a dental chemical polymerization catalyst comprising, particularly, a combination of an aryl borate compound and an acid compound, and exhibiting not only excellent polymerizing activity but also storage stability. [Means for Solution] A dental chemical polymerization catalyst comprising (A) an aryl borate compound; (B)an acid compound; (C) a vanadium compound having a valency of +IV or +V; and (D) a phenol type compound represented by the following general formula (1), wherein X1, X2 and X3 are each a hydrogen atom or a substitutent selected from the group consisting of a hydroxyl group, an alkoxy group and an alkyl group.Type: ApplicationFiled: November 26, 2008Publication date: December 2, 2010Applicant: TOKUYAMA DENTAL CORPORATIONInventors: Mikio Kimura, Naoki Kakiuchi
-
Publication number: 20100261144Abstract: [Problems] To provide a chemical polymerization type curable composition which can achieve a very large strength of adhesion even without irradiated with light, and is used in the field of dental therapy. [Means for Solution] A dental curable composition comprising (A) a polymerizable monomer component containing an acidic group-containing polymerizable monomer, (B) water, and (C) a chemical polymerization initiator component comprising a radical-generating species and a reactive species that generates radicals upon reacting with the radical-generating species; wherein, the dental curable composition is stored being divided into a plurality of packages, and is polymerized and cured by mixing together the components contained in the packages; and wherein one package (I) among the packages contains the component (A) and the component (B), and, further, contains polyvalent metal ions in an amount of 0.Type: ApplicationFiled: November 14, 2008Publication date: October 14, 2010Applicant: Tokuyama Dental CorporationInventors: Kyoichi Fujinami, Ayumi Dodomi, Koji Matsushige, Kazuhiko Okishio
-
Publication number: 20100216907Abstract: [Problems] To provide a one-package type tooth surface coating material that is capable of forming, on the surface of a tooth, a cured film having not only a very high strength of adhesion to the tooth surface but also excellent properties such as long-term adhesion, long-term durability, dentinal tubule occlusion and aesthetic appearance, and that has excellent storage stability and can be stored in the form of one package. [Means for Solution] A one-package type tooth surface coating material comprising (A) a polymerizable monomer component containing not less than 5% by mass of an acidic group-containing polymerizable monomer; (B) polyvalent metal ions; (C) a volatile water-soluble organic solvent; (D) water; and (E) an effective amount of a photopolymerization initiator; the amount of the polyvalent metal ions (B) and the amount of the volatile water-soluble organic solvent (C) satisfying a specific relationship.Type: ApplicationFiled: October 8, 2008Publication date: August 26, 2010Applicant: Tokuyama Dental CorporationInventors: Koji Matsushige, Qian Cui, Mikio Kimura
-
Publication number: 20100216096Abstract: Provided is a dental filling/restoration kit, in which a pretreatment material and a filling/restoring material can be cured by only one irradiation with light, which enables further improved adhesion between a tooth and the filling/restoring material, which prevents the filling/restoring material from being easily colored, to thereby exhibit its excellent sensuousness. Specifically provided is a dental filling/restoration kit which includes: a filling/restoring material (A) containing 100 parts by mass of a radical-polymerizable monomer (a) containing 3 to 30 parts by mass of a water-soluble radical-polymerizable monomer having no acidic group (a1), a photopolymerization initiator (b), and a filler (c), the filler (c) being contained in an amount of 80 to 2,000 parts by mass relative to 100 parts by mass of the radical-polymerizable monomer (a); and a pretreatment material (B) containing a radical-polymerizable monomer having an acidic group (d) and water (e).Type: ApplicationFiled: June 5, 2008Publication date: August 26, 2010Applicant: TOKUYAMA DENTAL CORPORATIONInventors: Takeshi Suzuki, Hideki Kazama
-
Publication number: 20100184882Abstract: The present invention discloses an adhesive for orthodontic attachments, which contains (A) a polymerizable monomer, (B) a polymerization initiator and (C) a fluorescent dye and, when cured, exhibits a fluorescence spectrum having a peak at 400 to 800 nm. As the polymerization initiator (B), there is preferably used a compound which generates a radical through the transfer of hydrogen between two components, or a compound which generates a radical species through intramolecular cleavage. As the fluorescent dye (C), a coumarin type dye is used preferably.Type: ApplicationFiled: May 29, 2008Publication date: July 22, 2010Applicants: NIHON UNIVERSITY, TOKUYAMA DENTAL CORPORATIONInventors: Namura Yasuhiro, Shimizu Noriyoshi, Amma Shizuka, Suzuki Takeshi, Kazama Hideki
-
Patent number: 7741381Abstract: A curable composition comprising: (A) 100 parts by mass of a monomer component which comprises a radically polymerizable monomer and has a water absorbing capacity of not larger than 20% by weight; (B) 0.5 to 10 parts by mass of water; (C) 0.1 to 20 parts by mass of a surfactant; and (D) an effective amount of a radical polymerization initiator. The curable composition is cured by polymerization in a state where a water layer is formed on the surfaces of the cured body that is being formed, effectively suppressing the hindrance of polymerization caused by oxygen and decreasing the formation of unpolymerized product on the surfaces of the cured body. The curable composition is particularly useful as a dental restorative which involves difficulty when it is to be polymerized while shutting off oxygen.Type: GrantFiled: March 17, 2006Date of Patent: June 22, 2010Assignees: Tokuyama Corporation, Tokuyama Dental CorporationInventors: Seiji Nakata, Naoki Kakiuchi, Hideki Kazama
-
Publication number: 20100120941Abstract: To improve an adhesive force of an adhesive agent between an impression material and a tray, and to stabilize the adhesive force therebetween, provided is an adhesive agent for the adhesion between an alginate impression material and an impression tray for dental applications, which includes a polyamine compound having two or more amino groups in a molecule and a solvent.Type: ApplicationFiled: February 27, 2008Publication date: May 13, 2010Applicant: TOKUYAMA DENTAL CORPORATIONInventors: Makoto Oguri, Hideki Kazama
-
Publication number: 20090076189Abstract: An adhesive composition comprising (A) a polymerizable monomer component containing not less than 5% by mass of an acidic group-containing polymerizable monomer, (B) a polyvalent metal ion-eluting filler, (C) a volatile organic solvent, and (D) water, wherein the polyvalent metal ion-eluting filler (B) is blended in such an amount that the amount of the polyvalent metal ions eluted out from the filler becomes 1.0 to 7.0 meq per gram of the polymerizable monomer component (A), the volatile organic solvent (C) is blended in an amount in a range of 30 to 150 parts by mass per 100 parts by mass of the polymerizable monomer component (A) and so as to satisfy 20·X parts by mass or more (X is a number representing the amount of elution of the polyvalent metal ions), and the water (D) is blended in an amount of 3 to 30 parts by mass per 100 parts by mass of the polymerizable monomer component (A).Type: ApplicationFiled: November 24, 2008Publication date: March 19, 2009Applicant: TOKUYAMA DENTAL CORPORATIONInventors: Koji MATSUSHIGE, Makoto OGURI, Shizuka SHIMIZU, Takeshi SUZUKI
-
Publication number: 20080293011Abstract: A mucosal adjustment material comprising a combination of a powdery material (a) and a liquid material (b), characterized especially in that a noncrosslinked (meth)acrylic polymer powder having a Tg in the range of 0-60° C., e.g., polybutyl methacrylate, is used as the powdery material and a liquid polymer which has a mass-average molecular weight of 1,000-10,000 and in which the content of oligomers having a molecular weight of 500 or lower is 10 mass % or lower is used as the liquid material. Such powdery material and liquid material are kneaded together to prepare a paste, which is applied to a denture base and used as a temporary relining material. This mucosal adjustment material in a paste form is reduced in the amount of ingredients eluted from the material during use in the mouth. In an ordinary use period, the relining material retains its initial flexibility and does not deteriorate the denture base.Type: ApplicationFiled: February 2, 2006Publication date: November 27, 2008Applicants: TOKUYAMA CORPORATION, TOKUYAMA DENTAL CORPORATIONInventors: Masanao Hashiguchi, Mitsuhiro Yamashita, Hideki Kazama
-
Publication number: 20080217190Abstract: A container which is not bulky at the time of shipping and can be stably stood on a suitable place. The container includes a lid member for closing a take-out opening (brittle portion) of the container body 2. On the lower outer side of the container body, there are formed slits for fitting the lid member to the container body after the container body and the lid member are separated apart, and auxiliary leg portions that protrude outward of the container body. The lid member is forming holding leg portions that protrude outward therefrom. Wing portions of the holding leg portions are inserted in the slits to fit the lid member to the container body, and the erected attitude of the container body is supported by the holding leg portions.Type: ApplicationFiled: March 7, 2008Publication date: September 11, 2008Applicant: Tokuyama Dental CorporationInventors: Koji Matsushige, Masayuki Aizawa, Nobutoshi Yamaguchi, Ayumi Dodomi
-
Patent number: 7365106Abstract: A cationically curable composition for dental use containing a cationic polymerization initiator (I) and cationically polymerizable monomers (II), the cationically polymerizable monomers (II) containing an oxetane compound and an epoxy compound or an alkenyl ether compound at a ratio of amounts that satisfy the conditions expressed by the following formula, (a×A):(b×B)=91:9 to 45:55 wherein A is a mol number of the oxetane compound, “a” is an average number of the oxetane functional group contained in one molecule of the oxetane compound, B is a mol number of the epoxy compound or the alkenyl ether compound, and “b” is an average number of the epoxy functional group contained in one molecule of the epoxy compound or an average number of the alkenyl ether functional group contained in one molecule of the alkenyl ether compound.Type: GrantFiled: April 26, 2005Date of Patent: April 29, 2008Assignees: Tokuyama Corporation, Tokuyama Dental CorporationInventors: Takeshi Suzuki, Hideki Kazama
-
Publication number: 20060247328Abstract: A curable composition comprising: (A) 100 parts by mass of a monomer component which comprises a radically polymerizable monomer and has a water absorbing capacity of not larger than 20% by weight; (B) 0.5 to 10 parts by mass of water; (C) 0.1 to 20 parts by mass of a surfactant; and (D) an effective amount of a radical polymerization initiator. The curable composition is cured by polymerization in a state where a water layer is formed on the surfaces of the cured body that is being formed, effectively suppressing the hindrance of polymerization caused by oxygen and decreasing the formation of unpolymerized product on the surfaces of the cured body. The curable composition is particularly useful as a dental restorative which involves difficulty when it is to be polymerized while shutting off oxygen.Type: ApplicationFiled: March 17, 2006Publication date: November 2, 2006Applicants: TOKUYAMA CORPORATION, TOKUYAMA DENTAL CORPORATIONInventors: Seiji Nakata, Naoki Kakiuchi, Hideki Kazama
-
Patent number: 7084182Abstract: A photopolymerization initiator comprising (A) an ?-diketone compound such as camphorquinone, (B1) an aliphatic amine compound such as triethanolamine or N-methyldiethanolamine, (B2) an aromatic amine compound such as ethyl p-dimethylaminobenzoate or N,N-dimethyl p-toluidine, and (C) a triazine compound substituted with a trihalomethyl group, such as 2,4,6-tris(trichloromethyl)-s-triazine or 2-phenyl-4,6-bis(trichloromethyl)-s-triazine. The photopolymerization initiator remains stable against the environmental light such as the indoor illumination light from a fluorescent lamp or the dental light illuminating the interior of the oral cavity, is excellently handled, is quickly cured by the irradiation with an intense light emitted from a light irradiator for polymerization, provides a cured body having excellent properties, can be stably preserved even at high temperatures, and is very useful as a dental composite resin.Type: GrantFiled: March 11, 2004Date of Patent: August 1, 2006Assignees: Tokuyama Corporation, Tokuyama Dental CorporationInventors: Tadashi Hara, Takeshi Suzuki, Rumiko Shimada, Hideki Kazama, Hironobu Akizumi, Mutsumi Kashimura
-
Patent number: 7056961Abstract: An adhesive composition for a denture base relining material which comprises an organic solvent containing no halogen atoms such as ethyl acetate, ethyl formate or acetone, a polymer such as a copolymer of methyl methacrylate and ethyl methacrylate, and a radical polymerizable monomer such as tetramethylolmethane tetramethacrylate; and a curable composition which comprises a radical polymerizable monomer, an organic peroxide such as benzoyl peroxide, a tertiary amine compound such as diethyl-p-toluidine or dipropyl-p-toluidine, and a hydroxycarboxylic acid such as malic acid or citric acid. The adhesive composition for a denture base relining material does not contain a halogen-atom-containing organic solvent whose harmful effect has been pointed out. Further, the composition has satisfactory adhesive properties and good operability and causes no degradation in the appearance of a denture base even if it sticks to an area on the surface of the denture base other than a contact area.Type: GrantFiled: December 3, 2001Date of Patent: June 6, 2006Assignees: Tokuyama Corporation, Tokuyama Dental CorporationInventors: Mitsuhiro Yamashita, Toshio Kawaguchi, Masanao Hashiguchi
-
Patent number: 7041714Abstract: A dental adhesive containing an acidic group-containing radically polymerizable monomer, a non-acidic radically polymerizable monomer, a chemical polymerization initiator and a filler, as well as a 2,4-diphenyl-4-methyl-1-pentene. When the dental adhesive is used for adhering a crown restorative to the tooth, an excess of cement swelling from the surface of adhesion can be favorably removed, the curing time can be suitably adjusted without decreasing the strength of adhesion to the tooth, and a change in the color tone of the cured body can be effectively suppressed.Type: GrantFiled: October 7, 2002Date of Patent: May 9, 2006Assignees: Tokuyama Corporation, Tokuyama Dental CorporationInventors: Hiroshi Takeshita, Emi Ishida, Hideki Kazama