Patent · US Active

Method for the production of a blank, blank and a dental restoration

US11833003B2 · kind B2 · utility

1Cited by

6References

14Claims

0Family size

Assignee

Dentsply Sirona Inc. · US

Inventors

Markus Vollmann · Gelnhausen, DE
Lothar Volkl · Goldbach, DE
Stefan Fecher · Goldbach, DE
Carsten Wiesner · Rockenberg, DE

Key dates

Filing date	Oct 17, 2017
Grant date	Dec 5, 2023
Priority date	—
Expiry date	Apr 23, 2038

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB33Y80/00
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The invention relates to a method for the production of a blank of a ceramic material, wherein a first ceramic material and then a second ceramic material of different compositions are filled into a mold and wherein the materials are pressed and after pressing are sintered. Thereby, a layer of the first ceramic material is filled into the mold, a first open cavity is formed in the layer, the second ceramic material is filled into the first open cavity and the materials are pressed together and are then heat-treated. Both the first ceramic material and the second ceramic material contain, or consists of, lithium silicate glass ceramic.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.