Patents by Inventor Koji Matsushige
Koji Matsushige has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20190083210Abstract: A maxilla standard dental plate configured so that if the length of a line segment PQ which connects a point P corresponding to the left-side pterygomaxillary notch at the plate posterior border and a point Q corresponding to the right-side pterygomaxillary notch at the plate posterior border is 1, the length of a line segment OM which connects a point O corresponding to the maxillary labial frenulum at the exact middle of the labial denture border and a median point M of the line segment PQ is 0.76-0.98.Type: ApplicationFiled: August 26, 2016Publication date: March 21, 2019Applicant: TOKUYAMA DENTAL CORPORATIONInventors: Kei NAKASHIMA, Tatsuya YAMAZAKI, Ayumu GYAKUSHI, Miki HITOMI, Koji MATSUSHIGE, Masanao HASHIGUCHI
-
Patent number: 9549879Abstract: A powder-liquid dental curable material kit composed of (A) a liquid material and (B) a powder material, wherein the liquid material (A) contains (a1) a radically polymerizable (meth)acrylic monomer, (a2) an organic halogen compound and (a3) a radical chain transfer agent; the powder material (B) contains (b1) non-crosslinked resin particles, (b2) a pyrimidinetrione compound and (b3) an organic metal compound; and (Z) a peroxide is blended in at least one of the liquid material (A) and the powder material (B). This curable material kit is capable of reducing the heat generation during the curing of a curable material which is a mixture of the liquid material (A) and the powder material (B) and is not susceptible to the excessive prolongation of the curing time even when the curable material is cured by a brush-on technique, thereby ensuring an appropriate curing time for both of a brush-on technique and a kneading technique.Type: GrantFiled: March 5, 2013Date of Patent: January 24, 2017Assignee: TOKUYAMA DENTAL CORPORATIONInventors: Megumi Sato, Kei Nakashima, Koji Matsushige
-
Patent number: 9125818Abstract: To suppress a curing agent paste stored in a sealed state in a packaging container from self-curing over a long period of time, provided are a dental alginate impression material as described below, and a curing agent paste to be used for the dental alginate impression material. The dental alginate impression material may includes: a base material paste including as main components: an alginic acid salt (A); and water (B); and a curing agent paste including as main components: a gelling reaction agent (C); a poorly water-soluble organic solvent (D); and a humectant (E).Type: GrantFiled: October 21, 2011Date of Patent: September 8, 2015Assignee: TOKUYAMA DENTAL CORPORATIONInventors: Yuko Nagasawa, Koji Matsushige, Hidetoshi Gyakushi
-
Patent number: 9125810Abstract: Provided is an aqueous composition containing alginic acid or a derivative thereof, the composition having a viscosity retained stably over a long period of time. The alginic acid-containing aqueous composition includes alginic acid or a derivative thereof (A), water (B), and a non-reducing sugar (C). Also provided are a dental alginate impression material and a base material for a dental alginate impression material each using the composition, in which the viscosity of the aqueous composition is stably maintained for a long period.Type: GrantFiled: April 20, 2011Date of Patent: September 8, 2015Assignee: TOKUYAMA DENTAL CORPORATIONInventors: Hidetoshi Gyakushi, Koji Matsushige, Yuko Nagasawa
-
Publication number: 20150038614Abstract: A powder-liquid dental curable material kit composed of (A) a liquid material and (B) a powder material, wherein the liquid material (A) contains (a1) a radically polymerizable (meth)acrylic monomer, (a2) an organic halogen compound and (a3) a radical chain transfer agent; the powder material (B) contains (b1) non-crosslinked resin particles, (b2) a pyrimidinetrione compound and (b3) an organic metal compound; and (Z) a peroxide is blended in at least one of the liquid material (A) and the powder material (B). This curable material kit is capable of reducing the heat generation during the curing of a curable material which is a mixture of the liquid material (A) and the powder material (B) and is not susceptible to the excessive prolongation of the curing time even when the curable material is cured by a brush-on technique, thereby ensuring an appropriate curing time for both of a brush-on technique and a kneading technique.Type: ApplicationFiled: March 5, 2013Publication date: February 5, 2015Inventors: Megumi Sato, Kei Nakashima, Koji Matsushige
-
Patent number: 8815974Abstract: [Problems] To provide a liquid dental adhesive composition which contains a phosphoric acid-type compound having a hydrogenphosphoric diester group as an acidic group-containing polymerizable monomer and, further, contains polyvalent metal ions, effectively preventing not only the gelation but also the formation of precipitates (cloudiness) during the storage.Type: GrantFiled: December 2, 2010Date of Patent: August 26, 2014Assignee: Tokuyama Dental CorporationInventors: Koji Matsushige, Qian Cui, Ayumi Dodomi
-
Patent number: 8765837Abstract: [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: GrantFiled: November 14, 2008Date of Patent: July 1, 2014Assignee: Tokuyama Dental CorporationInventors: Kyoichi Fujinami, Ayumi Dodomi, Koji Matsushige, Kazuhiko Okishio
-
Publication number: 20130220172Abstract: To suppress a curing agent paste stored in a sealed state in a packaging container from self-curing over a long period of time, provided are a dental alginate impression material as described below, and a curing agent paste to be used for the dental alginate impression material. The dental alginate impression material may includes: a base material paste including as main components: an alginic acid salt (A); and water (B); and a curing agent paste including as main components: a gelling reaction agent (C); a poorly water-soluble organic solvent (D); and a humectant (E).Type: ApplicationFiled: October 21, 2011Publication date: August 29, 2013Applicant: TOKUYAMA DENTAL CORPORATIONInventors: Yuko Nagasawa, Koji Matsushige, Hidetoshi Gyakushi
-
Patent number: 8513327Abstract: An adhesive composition for dental use exhibiting acidic property, including a mixture of a polymerizable monomer component (A) containing a phosphoric acid-type polymerizable monomer having an acidic group derived from phosphoric acid, and a multivalent metal ion-releasing component (B), wherein the multivalent metal ion-releasing component (B) is capable of releasing at least earth metal ions, and in the composition, earth metal ions stemming from the component (B) are present together with the phosphoric acid-type polymerizable monomer in such an amount that a total valency ratio (RE) defined by the following formula (1) is in a range of 0.2 to 3.0. The adhesive composition is capable of strongly adhering and fixing a composite resin or a prosthetic material to a tooth for extended periods of time maintaining stability.Type: GrantFiled: November 8, 2007Date of Patent: August 20, 2013Assignee: Tokuyama Dental CorporationInventors: Koji Matsushige, Takeshi Suzuki, Shizuka Shimizu, Ayumi Dodomi
-
Patent number: 8497312Abstract: 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: GrantFiled: November 24, 2008Date of Patent: July 30, 2013Assignee: Tokuyama Dental CorporationInventors: Koji Matsushige, Makoto Oguri, Shizuka Shimizu, Takeshi Suzuki
-
Publication number: 20130032058Abstract: Provided is an aqueous composition containing alginic acid or a derivative thereof, the composition having a viscosity retained stably over a long period of time. The alginic acid-containing aqueous composition includes alginic acid or a derivative thereof (A), water (B), and a non-reducing sugar (C). Also provided are a dental alginate impression material and a base material for a dental alginate impression material each using the composition, in which the viscosity of the aqueous composition is stably maintained for a long period.Type: ApplicationFiled: April 20, 2011Publication date: February 7, 2013Applicant: TOKUYAMA DENTAL CORPORATIONInventors: Hidetoshi Gyakushi, Koji Matsushige, Yuko Nagasawa
-
Patent number: 8357731Abstract: 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. The one-package type tooth surface coating material includes (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: GrantFiled: October 8, 2008Date of Patent: January 22, 2013Assignee: Tokuyama Dental CorporationInventors: Koji Matsushige, Qian Cui, Mikio Kimura
-
Publication number: 20120238658Abstract: [Problems] To provide a liquid dental adhesive composition which contains a phosphoric acid-type compound having a hydrogenphosphoric diester group as an acidic group-containing polymerizable monomer and, further, contains polyvalent metal ions, effectively preventing not only the gelation but also the formation of precipitates (cloudiness) during the storage.Type: ApplicationFiled: December 2, 2010Publication date: September 20, 2012Applicant: TOKUYAMA DENTAL CORPORATIONInventors: Koji Matsushige, Qian Cui, Ayumi Dodomi
-
Patent number: 8104609Abstract: 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: GrantFiled: March 7, 2008Date of Patent: January 31, 2012Assignee: Tokuyama Dental CorporationInventors: Koji Matsushige, Masayuki Aizawa, Nobutoshi Yamaguchi, Ayumi Dodomi
-
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: 20100317762Abstract: An adhesive composition for dental use exhibiting acidic property, including a mixture of a polymerizable monomer component (A) containing a phosphoric acid-type polymerizable monomer having an acidic group derived from phosphoric acid, and a multivalent metal ion-releasing component (B), wherein the multivalent metal ion-releasing component (B) is capable of releasing at least earth metal ions, and in the composition, earth metal ions stemming from the component (B) are present together with the phosphoric acid-type polymerizable monomer in such an amount that a total valency ratio (RE) defined by the following formula (1) is in a range of 0.2 to 3.0. The adhesive composition is capable of strongly adhering and fixing a composite resin or a prosthetic material to a tooth for extended periods of time maintaining stability.Type: ApplicationFiled: November 8, 2007Publication date: December 16, 2010Inventors: Koji Matsushige, Takeshi Suzuki, Shizuka Shimizu, Ayumi Dodomi
-
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: 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
-
Patent number: D588906Type: GrantFiled: September 6, 2007Date of Patent: March 24, 2009Assignee: Tokuyama CorporationInventors: Masayuki Aizawa, Nobutoshi Yamaguchi, Koji Matsushige, Ayumi Dodomi