# US 2019/0167392 A1 · Method for producing a prosthesis or partial prosthesis > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0167392 A1 - Document ID: US20190167392A1 - Status: Published application - Kind: A1 - Application number: 16/324,343 - Filed: 2017-08-08 - Published: 2019-06-06 - Earliest claimed: 2016-08-10 - Assignees: Ivoclar Vivadent AG - Applicants: Ivoclar Vivadent AG - Inventors: Alexander FAUST; Philipp MUHMENTHALER - Web page: https://patentgrep.com/patent/US20190167392A1 ## CPC - A61C 13/0004: {Computer-assisted sizing or machining of dental prostheses} - A61C 13/0006: {Production methods} - 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 13/087: Artificial resin teeth {(A61C13/081 takes precedence; preparations A61K6/80)} - A61C 13/1003: {by embedding in base material} - A61C 13/1013: {Arch forms} - A61C 13/1016: {Methods or apparatus for mounting, holding or positioning a set of teeth} - B23C 2215/00: Details of workpieces - B23C 2220/605: Roughing and finishing - 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) - B23C: MILLING (broaching B23D; broach-milling in making gears B23F; arrangement for copying or controlling B23Q) ## Abstract The invention relates to a method for producing a prosthesis or partial prosthesis based on digital data, using multiple teeth present in a dental arch (14) and a prosthesis base to be produced, characterized in that the prosthesis base is rough-milled by means of a milling tool, i.e. is milled in a first step, and in that the prosthesis base present as a semi-finished product, in particular in regions of the prosthesis base on which the teeth and the prosthesis base abut against each another and/or are to be bonded to each other, is partially milled, i.e. is milled in a second step, by means of an in particular different milling tool, thereby being brought to a target height which corresponds to the desired bonding gap between the prosthesis base and the tooth or dental arch (14). ## Claims ### Claim 1 A method for producing a prosthesis or partial prosthesis based on digital data, having a plurality of teeth in a dental arch and a prosthesis base, comprising rough-milling the prosthesis base with a first milling tool, to a semi-finished, prosthesis base, finish-milling the semi-finished prosthesis base with a second milling tool in regions of the prosthesis base, on which the teeth and the prosthesis base abut against one another and/or are to be bonded to one another, wherein the semi-finished prosthesis base is milled to a target height in the finish-milling step, which target height corresponds to the abutment between the prosthesis base and the teeth or dental arch plus the desired bonding gap between the prosthesis base and the teeth or dental arch. ### Claim 2 (depends on 1) The method according to claim 1, comprising rough-milling the dental arch from a tooth-colored blank, and finish-milling basal surface of the teeth of the dental arch and any gingival regions of the dental arch adjacent to the basal surface of the teeth. ### Claim 3 (depends on 2) The method according to claim 2, comprising gluing the dental arch with adhesive into dental cavities of the prosthesis base, curing the adhesive to connect the dental arch and prosthesis base, and finish-milling at locations where only rough-milled areas exist. ### Claim 4 (depends on 1) The method according to claim 1 comprising fabricating the dental arch for producing the prosthesis from a material comprising plastic having a hardness/strength which is greater than a hardness/strength of the prosthesis base material, and wherein the material further comprises fillers. ### Claim 5 (depends on 1) The method according to claim 1 comprising, rough-milling the prosthesis base comprising milling a flat cylindrical disc of prosthesis base material into an outer contour that is substantially U-shaped. ### Claim 6 (depends on 2) The method according to claim 2, comprising using roughing cutter during rough-milling of the prosthesis base having a cutting depth between 0.7 mm and 2.5 mm or, between 1.0 mm and 2.0 mm, using a finish-milling tool during finish-milling of the prosthesis base having a cutting depth between 0.1 mm and 0.5 mm, using a roughing cutter during rough-milling of the dental arch or partial dental arch having a cutting depth of between 0.6 mm and 2.2 mm, and/or using a finish-milling tool when finishing the dental arch or partial dental arch having a cutting depth between 0.1 mm and 0.4 mm. ### Claim 7 (depends on 1) The method according to claim 1, comprising using roughing cutters having tools with diameters between 0.8 mm and 6, and using finishing cutters having tools with diameters between 0.5 mm and 3 mm or, equal to or less than 2.5 mm. ### Claim 8 (depends on 3) The method according to claim 3, comprising providing an adhesive joint between the dental arch or partial dental arch and the prosthesis base having a thickness of between 0.08 mm and 0.22 mm, and using a relative position of the partial dental arch or dental arch in the cavities of the prosthesis base for height/side/angle correction of the connected dental or partial dental arch and prosthesis base. ### Claim 9 (depends on 3) The method according to claim 3, comprising following application of the adhesive and following bonding of the dental arch into the cavities of the prosthesis base and curing of the adhesive between the dental arch and the prosthesis base, finish-milling the dental arch in a workpiece holder of the milling machine while exclusively clamping the prosthesis base. ### Claim 10 (depends on 1) The method according to claim 1, comprising leaving holding bars on the dental arch during rough-milling from a blank disc, wherein the dental arch produced by rough-milling comprises a rounded cross-section in an incisal area of the dental arch, and a basal surface and side surfaces converging towards said basal surface in a gingival area of the dental arch, and wherein the dental arch is essentially U-shaped. ### Claim 11 (depends on 3) The method according to claim 3, comprising adapting a basal geometry of the dental arch to associated shapes of the cavities of the prosthesis base, or adapting the associated shapes of the cavities of the prosthesis base to the basal geometry of the dental arch, and, wherein the geometry and associated shapes are flatter and wider in the molar region and narrower and deeper in the incisor region. ### Claim 12 (depends on 3) The method according to claim 3, wherein the gingival regions of the dental arch are trapezoidally milled, forming preformed contact surfaces opposite the cavities in the prosthesis base. ### Claim 13 (depends on 1) The method according to claim 1, comprising prefabricating dental arches having substantially a U-shaped in multiple sizes, and selecting the size of the dental arch most suitable for the prosthesis to be manufactured, wherein the prefabricated dental arches are prefabricated by milling or pressing processes. ### Claim 14 A method for producing a prosthesis based on digital data comprising producing a substantially U-shaped dental arch, for subsequently holding teeth from a tooth-colored material in the form of a blank, leaving behind holding bars between the U-shaped dental arch and the blank as a semi-finished product, rough-milling teeth in the U-shaped dental arch wherein the teeth have an oversize in relation to a size of the desired teeth of the prosthesis, fine-milling a basal region in the dental arch having a basal surface and surfaces adjoining the basal surface for being received in a prosthesis base, and gluing or fastening the dental arch into the prosthesis base. ### Claim 15 (depends on 14) The method for producing a prosthesis according to claim 14, comprising finish-milling the glued or fastened prosthesis base and dental arch. ### Claim 16 (depends on 4) The method according to claim 4, comprising fabricating the dental arch from a plastic material and PMMA bead polymer fillers and/or highly crosslinked prepolymer fillers which are surrounded by a diffusion layer. ### Claim 17 (depends on 4) The method according to claim 4, comprising fabricating the dental arch from a plastic material and PMMA bead polymer fillers and/or highly crosslinked prepolymer fillers which are surrounded by a diffusion layer, wherein the fillers are present in the plastic material in an amount of greater than 0 to up to 20 wt. % of the total weight of the plastic material and fillers. ### Claim 18 (depends on 14) The method for producing a prosthesis according to claim 14, producing the substantially U-shaped dental arch from a tooth-colored material blank fabricated of PMMA with fillers. ### Claim 19 (depends on 13) The method according to claim 13, comprising prefabricating dental arches in at least 3 sizes.