# US 10,117,731 B2 · Material for denture base, denture base, method of manufacturing the denture base, plate denture, and method of manufacturing the plate denture > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,117,731 B2 - Document ID: US10117731B2 - Status: Granted - Kind: B2 - Application number: 15/116,124 - Filed: 2015-02-04 - Published: 2017-03-16 - Granted: 2018-11-06 - Earliest claimed: 2014-02-05 - Assignees: Mitsui Chemicals, Inc.; Nitto Jushi Kogyo Kabushiki Kaisha - Applicants: Mitsui Chemicals, Inc.; Nitto Jushi Kogyo Co., Ltd. - Inventors: Osamu Kohgo; Naoyuki Kato; Maho Okumura; Ahmad Jalaludin; Kouya Kojima; Eizaburo Higuchi; Yuji Takahashi - Web page: https://patentgrep.com/patent/US10117731B2 ## CPC - A61C 13/01: Palates or other bases or supports for the artificial teeth; Making same - A61C 13/0004: {Computer-assisted sizing or machining of dental prostheses} - A61L 27/16: obtained by reactions only involving carbon-to-carbon unsaturated bonds - A61L 27/18: obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds - A61L 27/26: Mixtures of macromolecular compounds - C08F 265/06: Polymerisation of acrylate or methacrylate esters on to polymers thereof - A61L 2430/12: for dental implants or prostheses - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) - A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K) - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS ## Abstract Disclosed is a material for a denture base containing a polymer component having a weight average molecular weight of 1,200,000 or more and containing an acrylic resin. ## Claims ### Claim 1 A material for a denture base containing a polymer component, the polymer component having a weight average molecular weight of 1,200,000 or more and containing an acrylic resin, wherein the acrylic resin is a polymer obtained by polymerizing a monomer component comprising 95% by mass or more of at least one selected from the group consisting of methacrylic acid and methacrylic acid alkyl ester, and wherein a content of the acrylic resin is 95% by mass or more based on a total amount of the material for a denture base. ### Claim 2 (depends on 1) The material for a denture base according to claim 1, wherein the weight average molecular weight of the polymer component is 1,500,000 or more. ### Claim 3 (depends on 1) The material for a denture base according to claim 1, wherein the weight average molecular weight of the polymer component is 2,500,000 or more. ### Claim 4 (depends on 1) The material for a denture base according to claim 1, wherein when the material for a denture base is formed into a test piece having a length of 80 mm, a width of 10 mm, and a thickness of 4 mm, the test piece exhibits 110 MPa or more of flexural strength measured by a three-point flexural test in accordance with JIS K7171 (2008) under conditions of a testing speed of 2 mm/min and a length of a support span of 64 mm. ### Claim 5 (depends on 4) The material for a denture base according to claim 4, wherein the flexural strength is 200MPa or less. ### Claim 6 (depends on 1) The material for a denture base according to claim 1, wherein when the material for a denture base is formed into a single-notched test piece which is provided with a notch having the shape A prescribed by JIS K7111-1 (2012) and has a length of 80 mm, a width of 10 mm, a remaining width of 8 mm, and a thickness of 4 mm, the test piece exhibits 1.41 kJ/m2 or more of impact strength measured by Charpy impact test under the condition of edgewise impact in accordance with JIS K7111-1 (2012). ### Claim 7 (depends on 1) The material for a denture base according to claim 1, wherein when the material for a denture base is formed into a single-notched test piece which is provided with a notch having the shape A prescribed by JIS K7111-1 (2012) and has a length of 80 mm, a width of 10 mm, a remaining width of 8 mm, and a thickness of 4 mm, the test piece exhibits 2.0 kJ/m2 or more of impact strength measured by Charpy impact test under the condition of edgewise impact in accordance with JIS K7111-1 (2012), and when the material for a denture base is formed into a test piece having a length of 80 mm, a width of 10 mm, and a thickness of 4 mm, the test piece exhibits 100 MPa or more of flexural strength measured by a three-point flexural test in accordance with JIS K7171 (2008) under conditions of a testing speed of 2 mm/min and a length of a support span of 64 mm. ### Claim 8 (depends on 7) The material for a denture base according to claim 7, wherein the polymer component further contains a rubber. ### Claim 9 (depends on 8) The material for a denture base according to claim 8, wherein the rubber contains a polymer obtained by graft polymerization of a rubbery polymer having a cross-linked structure with a thermoplastic resin component. ### Claim 10 (depends on 8) The material for a denture base according to claim 8, wherein the rubber contains a polymer obtained by graft polymerization of a butadiene (co)polymer with a thermoplastic resin component. ### Claim 11 (depends on 8) The material for a denture base according to claim 8, wherein a content of the rubber is from 1% by mass to 4% by mass based on a total amount of the material for a denture base. ### Claim 12 (depends on 8) The material for a denture base according to claim 8, wherein a content of the rubber is from 1% by mass to 2% by mass based on a total amount of the material for a denture base. ### Claim 13 (depends on 1) The material for a denture base according to claim 1, wherein: the monofunctional acrylic monomer consists of methacrylic acid and methacrylic acid alkyl ester, and an amount of the methacrylic acid is from 0.1% by mass to 15% by mass based on a total amount of the methacrylic acid and the methacrylic acid alkyl ester. ### Claim 14 (depends on 1) The material for a denture base according to claim 1, wherein the acrylic resin is polymethyl methacrylate. ### Claim 15 A material for a denture base, wherein: when the material for a denture base is formed into a test piece having a length of 80 mm, a width of 10 mm, and a thickness of 4 mm, the test piece exhibits 110 MPa or more of flexural strength measured by a three-point flexural test in accordance with JIS K7171 (2008) under conditions of a testing speed of 2 mm/min and a length of a support span of 64 mm, the material for a denture base contains a polymer component that is at least one selected from the group consisting of a sulfone-based resin and an ether ketone resin; and a content of the polymer component is 90% by mass or more based on a total amount of the material for a denture base. ### Claim 16 (depends on 15) The material for a denture base according to claim 15, wherein the flexural strength is 200 MPa or less. ### Claim 17 (depends on 15) The material for a denture base according to claim 15, wherein when the material for a denture base is formed into a single-notched test piece which is provided with a notch having the shape A prescribed by JIS K7111-1 (2012) and has a length of 80 mm, a width of 10 mm, a remaining width of 8 mm, and a thickness of 4 mm, the test piece exhibits 1.41 kJ/m2 or more of impact strength measured by Charpy impact test under the condition of edgewise impact in accordance with JIS K7111-1 (2012). ### Claim 18 (depends on 15) The material for a denture base according to claim 15, wherein the polymer component is at least one selected from the group consisting of polyphenyl sulfone and polyether ether ketone. ### Claim 19 (depends on 1) The material for a denture base according to claim 1, wherein a content of inorganic fibers and inorganic whiskers is 0.5% by mass or less, based on the total amount of the material for a denture base. ### Claim 20 (depends on 1) The material for a denture base according to claim 1, wherein the material for a denture base is a block body having a thickness of from 10 mm to 40 mm. ### Claim 21 (depends on 20) The material for a denture base according to claim 20, wherein the material for a denture base is used in manufacturing a denture base by cutting. ### Claim 22 (depends on 1) A denture base containing the material for a denture base according to claim 1. ### Claim 23 (depends on 20) A denture base obtained by cutting the material for a denture base according to claim 20. ### Claim 24 (depends on 22) A plate denture comprising the denture base according to claim 22 and an artificial tooth fixed to the denture base. ### Claim 25 (depends on 20) A method of manufacturing a denture base comprising a step of cutting the material for a denture base according to claim 20 to obtain a denture base. ### Claim 26 (depends on 25) The denture base manufacturing method according to claim 25, wherein the cutting step is a step of cutting the material for a denture base with the use of a CAD/CAM system to obtain a denture base. ### Claim 27 (depends on 20) A method of manufacturing a plate denture comprising: a step of cutting the material for a denture base according to claim 20 to obtain a denture base; and a step of fixing an artificial tooth to the denture base.