Back to results
US 2018/0008386 A1Published application
Production of Dental Shaped Parts
AssigneeIvoclar Vivadent AG
InventorsJörg Reinshagen, Sascha Cramer Von Clausbruch, Michael Winterling
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeIvoclar Vivadent AG
InventorsJörg Reinshagen, Sascha Cramer Von Clausbruch, Michael Winterling
Estimating the term…
The invention discloses a process for producing dental shaped parts which consists entirely of porous glass without crystalline portions. The density of the blank is between 50% and 95% of its theoretical density. It has a discoidal shape with a diameter of at least 20 mm. The blank is produced by a process in which glass powder is first pressed at a pressure of between 10 MPa and 300 MPa and this green body is (pre-)sintered at a temperature of between 580° C. and 750° C. to form a blank of porous glass without crystalline portions. From the obtained blank, monolithic dental shaped parts can be obtained by mechanical processing followed by sintering, wherein a process according to the invention for stabilizing the shape of the shaped parts is used.
Process for producing a monolithic dental shaped part, which process comprises at least one sintering step, wherein the monolithic shaped part is connected to at least one support structure or to at least one support mould during at least one time segment within the duration of the sintering, such that the change in shape of the shaped part during this time segment is limited by the support structure or the support mould.
Dependencies are inferred from the claim text.