# US 8,057,912 B2 · Blank for producing dental shaped parts and method for producing the shaped part > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,057,912 B2 - Document ID: US8057912B2 - Status: Granted - Kind: B2 - Application number: 10/557,153 - Filed: 2004-07-07 - Published: 2006-12-28 - Granted: 2011-11-15 - Earliest claimed: 2003-07-07 - Assignees: Sirona Dental Systems GmbH - Inventors: Franz Basler; Peter Fornoff - Web page: https://patentgrep.com/patent/US8057912B2 ## CPC - A61C 13/0022: {Blanks or green, unfinished dental restoration parts} - A61C 13/0003: {Making bridge-work, inlays, implants or the like} - G05B 2219/37227: Probing tool for its geometry - Y10T 29/49567: Dental appliance making - Y10T 29/49995: Shaping one-piece blank by removing material - Y10T 29/49996: Successive distinct removal operations - 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) - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The invention relates to a blank for producing dental shaped parts, comprising a blank body (1) made of tooth restoration material, from which the shaped part can be machined using a tool (11, 12, 13, 14, 15) for removing material. The aim of the invention is to enable a reliable verification or recognition of the tool fitting or of the type and state of wear of the used tool of a machine tool for the blank. To this end, the blank has at least one gauge (4, 5), whose dimensions are such that the tool present for the machining can be identified by the gauge on the basis of its outer contour. The invention also relates to a method for producing dental shaped parts with a blank body made of tooth restoration material, from which the entire shaped part can be machined in a machining device by a tool for removing material. In order to enable a reliable verification or recognition of the tool fitting or of the type and state of wear of the used tool of a machine tool for the blank, the tool selected for the machining is, before its use, verified with regard to the outer contour thereof by using at least one gauge that is placed upon the blank. ## Claims ### Claim 1 A system comprising: first and second tools, a diameter of an end of the first tool being smaller than a diameter of an end of the second tool; and a blank from which a dental shaped part is produced, the blank including a corpus of tooth restoration material from which the dental shaped part is formed by removing material using at least one of the first and second tools, and at least one gauge in the form of a recess having at least one predetermined dimension and shape, the end of the first tool fitting into the recess wherein the recess is smaller in size than the diameter of the second tool. ### Claim 2 (depends on 1) The system as defined in claim 1, wherein the gauge distinguishes an outer contour of the first tool from an outer contour of the second tool. ### Claim 3 (depends on 1) The system as defined in claim 1, wherein the shape of the recess is cylindrical and a diameter of the recess is smaller than the diameter of the second tool. ### Claim 4 (depends on 1) The system as defined in claim 1, wherein the recess is tapered to correspond at least in part to an outer contour of the first tool and the recess tapers to a diameter which is smaller than the diameter of the second tool. ### Claim 5 (depends on 1) The system as defined in claim 1, wherein the recess is in the form of a groove or a bore. ### Claim 6 (depends on 1) The system as defined in claim 1, wherein the recess identifies a state of permissible allowance of the first tool when the first tool engages the recess. ### Claim 7 (depends on 1) The system as defined in claim 1, wherein the blank has a handle for positioning the corpus of the blank in machining equipment, and the recess is provided on the handle. ### Claim 8 (depends on 1) The system as defined in claim 1, wherein the recess is located on the corpus. ### Claim 9 (depends on 1) The system as defined in claim 1, wherein the gauge functions as a universal gauge for prospective tools. ### Claim 10 (depends on 1) The system as defined in claim 1, wherein the blank includes a plurality of gauges, each of the plurality of gauges being designed as a recess having dimensions and a shape that correspond at least in part to an outer contour of a different one of the first and second tools. ### Claim 11 (depends on 1) The system as defined in claim 1, wherein the gauge has a first diameter of an outer contour of the first tool, and an outer contour of the second tool does not fit into the gauge.