公开(公告)号：US10441391B2

公开(公告)日：2019-10-15

申请号：US15464316

申请日：2017-03-20

Applicant: DENTSPLY SIRONA Inc.

Inventor： Lothar Volkl ,  Stefan Fecher ,  Martin Kutzner ,  Tanja Oefner

IPC: A61C13/083 ,  A61C13/00 ,  A61C13/08 ,  A61K6/00 ,  A61K6/02 ,  A61K6/04 ,  C04B35/48 ,  A61C13/09

Abstract: The invention relates to a method for manufacturing a colored blank, which contains zirconium dioxide and is intended for the manufacture of a dental restoration, whereby raw materials in powder form, at least some of which contain one coloring substance each, are mixed with, zirconium dioxide as the main ingredient, the resulting mixture is pressed and subsequently subjected to at least one thermal treatment. To generate the desired fluorescence, it is intended that in the raw materials in powder form one uses as coloring substances at least terbium, erbium, cobalt, as well as one substance that generates a fluorescence effect in the dental restoration, however not iron, aside from naturally occurring impurities.

公开(公告)号：US11464608B2

公开(公告)日：2022-10-11

申请号：US16595556

申请日：2019-10-08

Applicant: DENTSPLY SIRONA INC.

Inventor： Lothar Volkl ,  Martin Kutzner ,  Tanja Oefner ,  Stefan Fecher

IPC: A61C13/00 ,  A61C13/09 ,  A61C5/77 ,  A61C5/73 ,  C04B35/486 ,  B32B18/00 ,  A61C13/083 ,  A61C8/00 ,  A61C13/08 ,  B28B3/02 ,  C04B35/48 ,  C04B37/00

Abstract: The invention relates to a blank of a ceramic material, wherein a first ceramic material and then a second ceramic material of different compositions are filled into a die and wherein the materials are pressed and after pressing are sintered. A layer of the first ceramic material is thereby filled into the die and a first cavity formed in the layer, the second ceramic material is then filled into the first open cavity and the materials pressed together and then heat-treated.

公开(公告)号：US20170258563A1

公开(公告)日：2017-09-14

申请号：US15388282

申请日：2016-12-22

Applicant: DENTSPLY SIRONA Inc.

Inventor： Lothar VOLKL ,  Martin Kutzner ,  Tanja Oefner ,  Stefan Fecher

IPC: A61C13/00 ,  C04B35/48 ,  C04B37/00 ,  A61C8/00 ,  A61C13/09 ,  A61C5/73 ,  A61C5/77 ,  B28B3/02 ,  A61C13/08

CPC classification number: A61C13/0022 ,  A61C5/73 ,  A61C5/77 ,  A61C8/0013 ,  A61C13/081 ,  A61C13/082 ,  A61C13/083 ,  A61C13/09 ,  B28B3/021 ,  B32B18/00 ,  C04B35/48 ,  C04B35/486 ,  C04B37/001 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3232 ,  C04B2235/3239 ,  C04B2235/3241 ,  C04B2235/3244 ,  C04B2235/3262 ,  C04B2235/3272 ,  C04B2235/3277 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/72 ,  C04B2235/765 ,  C04B2235/9607 ,  C04B2235/9653 ,  C04B2235/9661 ,  C04B2237/348 ,  C04B2237/58 ,  C04B2237/84

Abstract: The invention relates to a method for the preparation 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 die and wherein the materials are pressed and after pressing are sintered. A layer of the first ceramic material is thereby filled into the die and a first cavity formed in the layer, the second ceramic material is then filled into the first open cavity and the materials pressed together and then heat-treated.