# US 12,004,915 B2 · Method of manufacturing removable denture, removable denture, and removable denture manufacturing apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,915 B2 - Document ID: US12004915B2 - Status: Granted - Kind: B2 - Application number: 17/043,048 - Filed: 2019-03-28 - Published: 2021-01-21 - Granted: 2024-06-11 - Earliest claimed: 2018-03-29 - Assignees: National University Corporation Tokyo Medical and Dental University - Applicants: National University Corporation Tokyo Medical and Dental University - Inventors: Manabu Kanazawa; Yumika Soeda; Maiko Iwaki; Toshio Arakida; Tamaki Hada; Shunsuke Minakuchi - Web page: https://patentgrep.com/patent/US12004915B2 ## CPC - A61C 13/1016: {Methods or apparatus for mounting, holding or positioning a set of teeth} - A61C 13/0004: {Computer-assisted sizing or machining of dental prostheses} - A61C 13/0006: {Production methods} - A61C 13/0019: {using three dimensional printing} - A61C 13/0022: {Blanks or green, unfinished dental restoration parts} - A61C 13/01: Palates or other bases or supports for the artificial teeth; Making same - A61C 13/04: {made by casting} - A61C 13/1003: {by embedding in base material} - A61C 13/34: Making or working of models, e.g. preliminary castings, trial dentures; Dowel pins [4] - B29C 66/032: {Mechanical after-treatments (deburring welded articles B29C37/04)} - B33Y 10/00: Processes of additive manufacturing - B33Y 50/02: for controlling or regulating additive manufacturing processes - B33Y 80/00: Products made by additive manufacturing - 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) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING ## Abstract Removable denture data of a removable denture is produced, and disk frame data of a disk frame in which the removable denture is accommodated is produced, thereby building the disk frame based on the disk frame data. Next, a resin disk in which artificial teeth are embedded is produced by arranging the artificial teeth in the disk frame and curing a base resin, and a denture base is milled by milling the resin disk based on the removable denture data, thereby manufacturing the removable denture in which a base side of the artificial teeth is embedded in the denture base. As a result, artificial teeth having an excellent aesthetics may be used, it is possible to firmly join the artificial teeth and the denture base to each other, and it is possible to manufacture a removable denture with a favorable restoration accuracy of the artificial teeth. ## Claims ### Claim 1 A method of manufacturing a removable denture, comprising: producing three-dimensional removable denture data for a removable denture to be manufactured, by producing three-dimensional denture base data of a denture base, and three-dimensional artificial teeth data including artificial teeth arranged on the denture base, and an arrangement of the artificial teeth; building a bottomed frame body into which a base resin for forming the denture base, which is based on the denture base data, is filled, by using a rapid prototyping method; producing a resin block by casting the base resin into the frame body for covering base side portions of the artificial teeth that are opposite to occlusal surfaces of the artificial teeth for fully embedding the artificial teeth in the base resin, wherein the artificial teeth, which have been produced in advance, are arranged on a bottom portion of the built frame body based on the artificial teeth data; and milling the base resin of the resin block based on the removable denture data to create the denture base and manufacture the removable denture in which the base side portions of the artificial teeth are embedded in the denture base, by milling the frame body and the base resin of the resin block from both the bottom portion of the frame body and a side opposite to the bottom portion using a milling device, and by removing the base resin attached to surfaces of the artificial teeth other than the base side portions of the artificial teeth. ### Claim 2 (depends on 1) The method of manufacturing a removable denture according to claim 1, wherein the artificial teeth are positioned with respect to the frame body based on the artificial teeth data and are arranged on a bottom plate in the frame body. ### Claim 3 (depends on 1) The method of manufacturing a removable denture according to claim 1, wherein fitting portions, into which base side portions of the artificial teeth that are opposite to occlusal surface side portions or occlusal surfaces of the artificial teeth are fitted in a case in which the artificial teeth are arranged based on the artificial teeth data, are provided in the bottom plate in the frame body. ### Claim 4 (depends on 1) The method of manufacturing a removable denture according to claim 1, wherein, in the building, a positioning portion by which the artificial teeth arranged in the frame body are positioned with respect to the milling device is built on the frame body. ### Claim 5 (depends on 1) The method of manufacturing a removable denture according to claim 1, wherein, in the building, the frame body is built based on three-dimensional frame body data of the frame body that is produced according to the removable denture data. ### Claim 6 (depends on 5) The method of manufacturing a removable denture according to claim 5, wherein the frame body data is produced by determining relative positions so that a three-dimensional removable denture image represented by the removable denture data is accommodated in a three-dimensional frame body image represented by the frame body data. ### Claim 7 (depends on 6) The method of manufacturing a removable denture according to claim 6, further comprising producing the frame body data by excluding an overlapping portion from a bottom plate of the frame body image owing to a base part side at an opposite side from occlusal surface side portions or occlusal surfaces of the artificial teeth shown in the removable denture image overlapping with the bottom plate of the frame body shown in the frame body image. ### Claim 8 (depends on 1) The method of manufacturing a removable denture according to claim 1, wherein the base resin is cast into the frame body for fully embedding the artificial teeth therein by forming a smooth surface plane of the base resin above the artificial teeth. ### Claim 9 A method of manufacturing a removable denture, comprising: producing three-dimensional removable denture data for a removable denture to be manufactured, by producing three-dimensional denture base data of a denture base, and three-dimensional artificial teeth data including artificial teeth arranged on the denture base, and an arrangement of the artificial teeth; building a bottomed frame body into which a base resin for forming the denture base, which is based on the denture base data, is filled, by using a rapid prototyping method; producing a resin block by casting the base resin into the frame body for covering base side portions of the artificial teeth that are opposite to occlusal surfaces of the artificial teeth for fully embedding the artificial teeth in the base resin, wherein the artificial teeth, which have been produced in advance, are arranged on a bottom portion of the built frame body based on the artificial teeth data; and milling the base resin of the resin block based on the removable denture data to create the denture base and manufacture the removable denture in which the base side portions of the artificial teeth are embedded in the denture base, by milling the frame body and the base resin of the resin block from both the bottom portion of the frame body and a side opposite to the bottom portion using a milling device, and by removing the base resin attached to surfaces of the artificial teeth other than the base side portions of the artificial teeth, wherein, in the milling, the removable denture in which the artificial teeth are arranged on the denture base according to the removable denture data is milled by milling surfaces of the artificial teeth based on the artificial teeth data in a case in which the arrangement of the artificial teeth embedded in the base resin does not match the artificial teeth data.