# US 10,945,821 B2 · Sintered blank for producing a dental prosthesis > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,945,821 B2 - Document ID: US10945821B2 - Status: Granted - Kind: B2 - Application number: 15/749,629 - Filed: 2016-06-20 - Published: 2019-06-13 - Granted: 2021-03-16 - Earliest claimed: 2015-08-03 - Assignees: Amann Girrbach AG - Applicants: Amann Girrbach AG - Inventors: Oliver Amann - Web page: https://patentgrep.com/patent/US10945821B2 ## CPC - A61C 13/0022: {Blanks or green, unfinished dental restoration parts} - A61C 13/0004: {Computer-assisted sizing or machining of dental prostheses} - B28B 1/001: {Rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating of material (selective deposition modelling of metallic powder B22F10/00; rapid manufacturing of 3D objects in general and in particular of plastics B29C64/00)} - B33Y 10/00: Processes of additive manufacturing - 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) - B28B: SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER (foundry moulding B22C; working stone or stone-like material B28D; shaping of substances in a plastic state, in general B29C; making layered products not composed wholly of these substances B32B) - 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 A sintered blank (1) for producing a dental prosthesis is provided, in which the sintered blank (1) include at least one product area (2), from which the dental prosthesis is produced, and at least one auxiliary sintering body (3) and connecting webs (4) for bracing the product area (2), wherein the auxiliary sintering body (3) is connected to the product area (2) by the connecting webs (4), the auxiliary sintering body (3) including one, preferably precisely one, at least in some areas, preferably completely curved support surface (5). ## Claims ### Claim 1 A sintering arrangement comprising: a pourable bed made of at least one of carrier beads or a carrier powder, a sintering blank for producing a dental prosthesis mounted on the bed, the sintering blank including at least one product region from which the dental prosthesis is created, at least one sintering auxiliary body, and connecting webs for bracing the product region, the sintering auxiliary body is connected to the product region by the connecting webs, and the sintering auxiliary body has a support surface that is arched at least in regions, and both the product region and the arched support surface of the sintering auxiliary body are at least partially embedded into the bed. ### Claim 2 (depends on 1) The sintering arrangement as claimed in claim 1, wherein the sintering auxiliary body, at least in a region delimited by the arched support surface has at least one convex cross section. ### Claim 3 (depends on 1) The sintering arrangement as claimed in claim 1, wherein the sintering auxiliary body, at least in a region delimited by the arched support surface has convex cross sections in at least two mutually orthogonal spatial directions. ### Claim 4 (depends on 1) The sintering arrangement as claimed in claim 1, wherein the sintered auxiliary body has a greater thickness in a central region than in regions at an edge thereof. ### Claim 5 (depends on 1) The sintering arrangement as claimed in claim 1, wherein the connecting webs merge into the sintering auxiliary body in regions at an edge of the sintering auxiliary body. ### Claim 6 (depends on 1) The sintering arrangement as claimed in claim 1, wherein the sintering auxiliary body, at least in a region delimited by the arched support surface, has at least one convex lens-shaped cross section. ### Claim 7 (depends on 1) The sintering arrangement as claimed in claim 1, wherein a maximum thickness of the sintering auxiliary body is less than or equal to 6 times a minimum thickness of the connecting webs. ### Claim 8 (depends on 1) The sintering arrangement as claimed in claim 1, wherein the product region is a dental arch with a sequence of a plurality of denture tooth blanks connected to one another, and the sintering auxiliary body connects at least two of the denture tooth blanks of said dental arch to one another by way of one connecting web in each case. ### Claim 9 (depends on 8) The sintering arrangement as claimed in claim 8, wherein the dental arch partly encloses an internal space and at least one of the sintering auxiliary body or the connecting webs are arranged at least in part in the internal space. ### Claim 10 (depends on 1) The sintering arrangement as claimed in claim 1, wherein the sintering blank is formed of a ceramic material. ### Claim 11 (depends on 1) The sintering arrangement as claimed in claim 1, wherein the whole sintering blank is at least one of an integral body or worked out of a single material block. ### Claim 12 (depends on 1) The sintering arrangement as claimed in claim 1, wherein the support surface is arched everywhere. ### Claim 13 (depends on 8) The sintering arrangement as claimed in claim 8, wherein the dental arch is at least one of a U-shaped or complete dental arch. ### Claim 14 (depends on 10) The sintering arrangement as claimed in claim 10, wherein the sintering blank consists of zirconium oxide. ### Claim 15 (depends on 1) The sintering arrangement as claimed in claim 1, wherein the product region and the sintering auxiliary body and the connecting webs are integrally formed of a same material. ### Claim 16 (depends on 1) A sintering method, comprising: providing the sintering arrangement of claim 1, and sintering with both the product region and the arched support surface of the sintering auxiliary body are at least partially embedded into the bed.