Method and device for producing dentures

专利名称：Method and device for producing dentures发明人：WEBER, GERHARD,HOLZNER, STEPHAN申请号：EP07000910.5申请日：20050610公开号：EP1795149A3公开日：20090429

专利附图：

摘要：Production of denture parts is effected by using digitally-obtained data of thecorresponding tooth space and using such surface and mold data to design the three-dimensional required mold, such procedure taking into consideration a number ofspecified aspects. Independent claims are also included for: (1) designing webconstructions between the tooth stumps and production of the corresponding molddata; (2) graphically representing surface data obtained from a bite impression and, usinga gypsum model, forming the denture part; (3) creating the 3-D molding from acombination of geometrical data; (4) creating an implant stud from the surface data; (5)applying on an implant stud a wax model of an abutment using a scanning processcontrolled by the data so as to form an abutment with jointed upper and lower sides; (6)

applying a mark to a graphic representation of the surface data and constructing themold data for the denture part based on the surface data and taking into considerationthe mark; (7) making a rough assembly on the gypsum model using wax, again scanningthe assembly and then accurately correlating the two scans; (8) distinguishing variations inthe wall thickness of the restoration in a visual display by color gradations or by partiallyrendering transparent; (9) scanning a cavity to detect the edges, modelling in wax,scanning again, superimposing the two data sets by 3-D matching and deriving adifferential data set; (10) proceeding as per the process immediately above but thenobtaining the differential data set by overlaying the two scans and filtering out thedeviation relevant to the inlay; (11) using a volume differential formation; (12)determining the position of implant studs or screws in a gypsum model by scanning,importing the geometrical data of the implant studs and matching it with the 3-D-determined data and displaying visually and, finally, constructing crown or bridge basedon the previous steps and transferring to a CNC machine; (13) arranging primary crownsand their data sets by selecting a visible friction line on a visual display, marking a positionor point on the friction line, selecting from this point a range and also the breadth of aposition to be altered, drawing the friction line at this point over the selected rangeabove, below, internally or externally and so producing a new topography of the primarycone by retaining the parallel relationship to the plug-in direction or retaining the coneangle; (14) producing primary crowns by 3 + 1 or angular axis milling or grinding; (15)avoiding undercutting using an additional plug-in direction and a milling device; (16)achieving an optimal alignment of the blank to the milling part by 'uphill/downhill'milling; and (17) scanning a modelling wax using a wax with at least 1/3 to 4/5 weightparts of zirconium oxide powder. An independent claim is also included for an apparatusfor the above process or processes including in coupled form data processing units, datastores, a visual display unit, feed and output units, data transfer units and a materialprocessing device.

申请人：AEPSILON RECHTEVERWALTUNGS GMBH

地址：Lochhamer Schlag 6 82166 Gräfelfing DE

国籍：DE

代理机构：Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät

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