Patents Assigned to Shofu, Inc.
-
Publication number: 20210212906Abstract: To provide a dental glass ionomer cement composition which exhibits high mechanical properties. The dental glass ionomer cement composition of the present disclosure comprises (a) non-crosslinked polyalkenoic acid, (b) water, (c) crosslinked polyalkenoic acid: 0.01 to 10 wt. %, and (d) acid-reactive glass powder.Type: ApplicationFiled: September 25, 2020Publication date: July 15, 2021Applicant: SHOFU INC.Inventors: Shuji SAKAMOTO, Shun SHIMOSOYAMA, Katsuya KIMOTO
-
Publication number: 20210214573Abstract: To provide a photopolymerizable type dental surface coating material composition which may finish the applied part lubriciously in a short time by exhibiting excellent surface curability regardless of the type of light irradiator, may protect the restoration from abrasion and stain for a long time by exhibiting excellent adhesive property to various restorations including the dental glass ionomer cement for filling and the tooth substance, and may have excellent storage stability that can maintain properties and characteristics for a long time. The photopolymerizable type dental surface coating composition of the present disclosure comprises (a) polyfunctional polymerizable monomer, (b) volatile monofunctional polymerizable monomer, (c) acidic group-containing polymerizable monomer, (d) ?-diketone compound, (e-1) aromatic tertiary amine as (e) amine compound, and (e-2) aliphatic tertiary amine as (e) amine compound, wherein the compounding ratio of the (e-1) and the (e-2) is within a range of 1.0:99.Type: ApplicationFiled: September 25, 2020Publication date: July 15, 2021Applicant: SHOFU INC.Inventors: Shuji SAKAMOTO, Jun UCHIDA
-
Publication number: 20210205181Abstract: To provide one liquid type dental adhesive composition that exhibits excellent adhesive property to glass ceramics, oxide-base ceramics and tooth substance, and has excellent storage stability, which are contrary features. One liquid type dental adhesive composition contains (a) silane coupling agent represented by general formula (1), (b) acidic group-containing polymerizable monomer, (c) volatile organic solvent, and (d) water. (In the formula, R1 represents an organic group having at least one functional group selected from the group consisting of a (meth)acryloyl group, a vinyl group and an epoxy group, R2 represents C4-C8 linear alkyl group, R3 represents C1-C8 alkyl group, and n is integer selected from 1 to 3.Type: ApplicationFiled: September 25, 2020Publication date: July 8, 2021Applicant: SHOFU INC.Inventors: Naoya KITADA, Rei NISHIMURA, Hiroyuki KOBAYASHI, Kenzo Yamamoto
-
Publication number: 20210189098Abstract: To provide a dental curable composition having excellent curability and storage stability. The dental curable composition contains(a) transition metal adsorbent in which a transition metal compound of the period 4 in the periodic table is adsorbed on an inorganic particle which is non-reactive with a transition metal of the period 4 in the periodic table, (b) thiourea derivative, (c) organic peroxide having a hydroperoxide group, and (d) polymerizable monomer, wherein the (d) polymerizable monomer contains (d-1) acidic group-non-containing polymerizable monomer, and wherein a pore volume of the inorganic particle which is non-reactive with a transition metal of the period 4 in the periodic table is 0.2 cc/g or less.Type: ApplicationFiled: September 25, 2020Publication date: June 24, 2021Applicant: SHOFU INC.Inventors: Daisuke HARA, Kenzo YAMAMOTO, Yasuhiro NISHINO, Kazuya SHINNO
-
Patent number: 11033466Abstract: The present invention provides the dental primer for modifying surface of a dental restoration, comprising: an organic solvent, a silane coupling agent and a weakly acidic compound.Type: GrantFiled: October 10, 2017Date of Patent: June 15, 2021Assignee: SHOFU INC.Inventors: Yusei Kadobayashi, Masako Shigezawa
-
Patent number: 11033464Abstract: To provides a polymerizable composition having high storage stability and high color stability. To provide a two-paste type dental polymerizable composition of the present invention is a two-paste type dental polymerizable composition comprising a first paste containing (A) at least one kind of polemerizable monomer, an (B) organic peroxide as a chemical polymerization initiator, and a (C) basic filler, and a second paste containing (A) at least one kind of polemerizable monomer, a (C) basic filler and an (D) aromatic amine compound as a chemical polymerization accelerator, wherein the second paste contains 30 to 80 parts by weight of the (C) basic filler based on 100 parts by weight of the total amount of the second paste.Type: GrantFiled: November 30, 2018Date of Patent: June 15, 2021Assignee: SHOFU INC.Inventors: Daisuke Hara, Naoya Kitada, Toshiyuki Nakatsuka
-
Patent number: 11033465Abstract: To provide a one paste type dental adhesive composition which has mechanical characteristics and aesthetic property required in the restoration material, is superior in durable adhesive strength to the tooth substance, and is hard to be affected by the polymerization shrinkage stress and exhibits excellent durable adhesive strength even if the composition of the present invention is collectively filled and cured. To provide a dental adhesive composition comprising: (a) an acidic group-non-containing polymerizable monomer, (b) an acidic group-containing polymerizable monomer, (c) a filler, (d) a photo polymerization initiator, and (e) a chain transfer agent, wherein the chain transfer agent (e) contains ?-alkylstyrene compound.Type: GrantFiled: March 19, 2019Date of Patent: June 15, 2021Assignee: SHOFU INC.Inventors: Shunsuke Miyata, Hidefumi Fujimura
-
Patent number: 11033369Abstract: In color reproduction for a dental restorative material, in order to achieve a color that closely matches the color of the natural tooth, one technique that is used is to form a mill blank by laminating layers of materials having different colors. However, misidentification of layers frequently occurs. The present invention is a dental mill blank having a plurality of layers and the dental mill blank has a visual identifying portion by which the plurality of layers are visually identifiable. The visual identifying portion may be provided by color or by structure. Providing the visual identifying portion by color refers to coloring the surface of a layer of the dental mill blank and providing the visual identifying portion by structure refers to forming microscopic or macroscopic irregularities in the entire periphery or part of a layer surface.Type: GrantFiled: June 14, 2016Date of Patent: June 15, 2021Assignee: SHOFU INC.Inventors: Masanori Goto, Yusei Kadobayashi
-
Publication number: 20210137796Abstract: To provide a dental photopolymerizable composition which can prepare a dental restoration with excellent aesthetic and mechanical properties by optical three-dimensional modeling method (stereolithography). The dental photopolymerizable composition for 3D printer of the present disclosure comprises: a (a) (meth)acrylate-based polymerizable monomer consisting of a (a1) (meth)acrylate-based polymerizable monomer containing a urethane structure and a (a2) (meth)acrylate-based polymerizable monomer not containing a urethane structure, a (b) cohesive inorganic filler, and a (c) photopolymerization initiator, wherein; a ratio of the (a1) (meth)acrylate-based polymerizable monomer containing a urethane structure and the (a2) (meth)acrylate-based polymerizable monomer not containing a urethane structure in the (a) (meth)acrylate-based polymerizable monomer is 51:80 to 49:20 pts.wt., a ratio of the (a) (meth)acrylate-based polymerizable monomer and the (b) cohesive inorganic filler is 50:91 to 50:9 pts.wt.Type: ApplicationFiled: August 25, 2020Publication date: May 13, 2021Applicant: SHOFU INC.Inventors: Mamoru HOSOKAWA, Hidefumi FUJIMURA
-
Patent number: 11000453Abstract: To provide an organic-inorganic composite filler containing; a polymerizable monomer (a) having at least one functional group selected from the group consisting of —OH group, —NH— group, and —NH2 group, a polymerizable monomer (b) having no functional group selected from the group consisting of —OH group, —NH— group, and —NH2 group, a polymerization initiator (c), an inorganic filler (d), and a silane compound (e) which generates —OH group by hydrolysis.Type: GrantFiled: February 17, 2017Date of Patent: May 11, 2021Assignee: SHOFU INC.Inventors: Katsuya Kimoto, Shunsuke Miyata, Hideto Kasaba
-
Patent number: 10987283Abstract: To provide a glass ionomer cement having excellent removality of the excess cement after setting because of having shape retaining property where a kneaded material does not drip and flow by their own weights, few risk of water sensitivity and excellent operability at the bonding such that excess cement can be removed easily after an application in an oral cavity in an early timing in spite of exhibiting a thin film thickness at the bonding. A dental glass ionomer cement composition for luting comprises at least; a component (a) acid reactive glass powder having an average particle diameter within a range of 4.5 to 7.0 ?m, a component (b) polymer of an acid group-containing polymerizable monomer having a weight average molecular weight within a range of 30000 to 100000, a component (c) chelating agent and a component (d) water, wherein a plastic flow distance of a kneaded material before setting is 2 mm or less, and a removal possible time of an excess cement is 2 minutes or less.Type: GrantFiled: March 19, 2019Date of Patent: April 27, 2021Assignee: SHOFU INC.Inventors: Shun Shimosoyama, Katsuya Kimoto
-
Patent number: 10988403Abstract: To provide a glass composition which can be used for a dental porcelain or a dental ceramics coloring material, and has low temperature meltability, acid resistance and preservation stability under the humid environment which are required for a dental porcelain or a dental ceramics coloring material, and a dental porcelain and dental ceramics coloring material which contain the glass composition of the present disclosure. To provide a low melting glass composition with softening point (Ts) less than 600° C. comprising as a component; SiO2: 55.0 to 75.0 wt. %, B2O3: 6.1 to 12.0 wt. %, Al2O3: 2.0 to 8.0 wt. %, ZnO: 2.0 to 8.5 wt. % and two or more kinds of alkali metal oxide: 10.5 to 20.0 wt. %.Type: GrantFiled: January 24, 2019Date of Patent: April 27, 2021Assignee: SHOFU INC.Inventors: Keita Kawata, Masanori Goto, Kenji Kono
-
Patent number: 10945927Abstract: To provide a phosphate-based dental investment material which can used for metal and press ceramic and especially can impart the lubricity to the surface of a press ceramic, and a phosphate-based dental investment material which can be subjected to a flash heating for press ceramic, can obtain sufficient the hardening expansion, and can easily remove the investment material after press molding. A phosphate-based dental investment material of the present disclosure comprising a powder material and a liquid material, wherein the powder material contains (a) magnesium oxide: 5 to 20 wt. %; (b) ammonium dihydrogenphosphate: 8 to 25 wt. % and the liquid material contains (c) aqueous solution including a cation-treated colloidal silica.Type: GrantFiled: May 17, 2018Date of Patent: March 16, 2021Assignee: SHOFU INC.Inventors: Toshio Kitamura, Masahiro Kazama
-
Patent number: 10905532Abstract: To provide a mill blank for dental CAD/CAM containing a ceramic material for preparing a dental restoration by being installed in a CAD/CAM device, wherein, the mill blank for dental CAD/CAM comprises a ceramic portion in which a dental restoration is cut out and a resin portion which joins with a CAD/CAM device, the mill blank for dental CAD/CAM has a columnar shape, the resin portion is provided at a side surface of the ceramic portion and has a cylindrical shape or a belt shape, a ceramic portion side of the resin portion contacts with the side surface of the ceramic portion, the ceramic portion has a columnar shape, the ceramic portion has a protrusion part, an upper surface and a bottom surface of the columnar shape of the ceramic portion are parallel to each other, the mill blank for dental CAD/CAM has at least two recesses which includes a first recess and a second recess in a circumference portion, the first recess and the second recess respectively include a first surface which is parallel to the uppType: GrantFiled: August 24, 2017Date of Patent: February 2, 2021Assignee: SHOFU INC.Inventors: Yusei Kadobayashi, Masako Shigezawa
-
Patent number: 10905531Abstract: To provide a mill blank for dental CAD/CAM for preparing a dental restoration by being installed in a CAD/CAM device, wherein, the mill blank for dental CAD/CAM has a substantially columnar shape, the mill blank for dental CAD/CAM has at least one recess in a circumference portion, the recess does not extend over the whole of the circumference portion of the mill blank for dental CAD/CAM, and the recess of the mill blank for dental CAD/CAM is to be engaged with the CAD/CAM device.Type: GrantFiled: July 28, 2017Date of Patent: February 2, 2021Assignee: SHOFU INC.Inventors: Yusei Kadobayashi, Masako Shigezawa
-
Publication number: 20210007938Abstract: An object of the present disclosure is to provide a dental composition that can exhibit sufficient curability even in a state where moisture is excessive as in the oral environment. The dental composition of the present disclosure contains component (a): monomer containing (meth)acrylamide group represented by formula (1): (In formula, R represents a hydrogen atom or a methyl group and Rs may be the same or different from each other. R2 is an alkyl group having 2 to 6 carbon atoms and R2s may be the same or different from each other.Type: ApplicationFiled: March 25, 2020Publication date: January 14, 2021Applicant: SHOFU INC.Inventors: Yusei KADOBAYASHI, Hiroshi YAANA, Jun UCHIDA, Yuji SADAKANE
-
Publication number: 20210000699Abstract: An object of the present invention is to provide a dental resin-reinforced glass ionomer cement composition which exhibit high surface curability even under wet conditions, which makes it difficult for the surface to become cloudy even if moisture comes in contact with at the initial stage of curing, exhibits high mechanical properties, low water absorption expansion and excellent coloring resistance in the set product and is also excellent in storage stability. The dental resin-reinforced glass ionomer cement composition consisting of a powder material and a liquid material, wherein the powder material contains (a) acid-reactive glass powder, the liquid material contains (b) water, (c) polymer of acidic group-containing polymerizable monomer, (d) hydroxyl group-containing (meth)acrylate-based polymerizable monomer and (e) tri or more functional (meth)acrylamide-based polymerizable monomer, and at least one of the powder material and the liquid material contains (f) polymerization initiator.Type: ApplicationFiled: March 25, 2020Publication date: January 7, 2021Applicant: SHOFU INC.Inventors: Jun UCHIDA, Katsuya KIMOTO
-
Publication number: 20210000698Abstract: An object of the present invention is to provide a two-paste type dental resin-reinforced glass ionomer cement composition which exhibit high surface curability even under wet conditions, which makes difficult for the surface to become cloudy even if moisture comes in contact with at the initial stage of curing, exhibits high mechanical properties, low water absorption expansion and excellent coloring resistance in the set product and is also excellent in storage stability.Type: ApplicationFiled: March 25, 2020Publication date: January 7, 2021Applicant: SHOFU INC.Inventors: Jun UCHIDA, Tomohiro KUMAGAI, Ken HIRATSUKA
-
Patent number: D925317Type: GrantFiled: May 29, 2019Date of Patent: July 20, 2021Assignee: SHOFU INC.Inventors: Tomohiro Kai, Masayoshi Nishizawa
-
Patent number: RE48730Abstract: A composite material including silanated filler and mixed polymerizable monomer, having a stable pasty property which keeps well and has a consistent usability. A composite material containing a silanated filler, a polymerizable monomer, and a polymerization initiator, and may be produced by a process which includes a mixed polymerizable monomer preparing step, a silanation step, a silanated filler preserving step, a composite material preparing step, a composite material preserving step, a composite material filling step, and a small quantity preserving container preserving step.Type: GrantFiled: March 21, 2019Date of Patent: September 14, 2021Assignee: SHOFU INC.Inventors: Yusei Kadobayashi, Masako Shigezawa