公开(公告)号：US20190046305A1

公开(公告)日：2019-02-14

申请号：US15671779

申请日：2017-08-08

Applicant: DENTSPLY SIRONA Inc.

Inventor： Andreas GEBHARDT ,  Stefan FECHER ,  Lothar VOLKL

IPC: A61C13/00

Abstract: The invention relates to a method for positioning a blank (116), which after insertion in a holder is in contact therewith, wherein the holder has a structural element. The blank (16) is positioned in the holder by means of an adapter (118), which is inserted in both the holder or the structural element and the blank, wherein the adapter positively engages with the holder or the structural element and with the blank.

公开(公告)号：US20220175500A1

公开(公告)日：2022-06-09

申请号：US17435420

申请日：2020-03-11

Applicant: DENTSPLY SIRONA Inc.

Inventor： Stefan FECHER ,  Lothar VÖLKL ,  Markus VOLLMANN ,  Andreas GEBHARDT

IPC: A61C13/00 ,  A61C13/08 ,  A61C13/083

Abstract: A blank for milling or grinding a dental article, the blank having a plate-shaped body adapted to be received in a blank holder of a CAM system, which plate-shaped body comprises one or more ceramic or glass ceramic blank portions and two or more through holes, wherein each through hole is contiguous with at least one of the ceramic or glass ceramic blank portions for receiving a working end of a milling or grinding tool of the CAM system.

公开(公告)号：US20190076222A1

公开(公告)日：2019-03-14

申请号：US15701522

申请日：2017-09-12

Applicant: DENTSPLY SIRONA Inc.

Inventor： Lothar VOLKL ,  Stefan FECHER ,  Andreas GEBHARDT

IPC: A61C13/08 ,  A61C13/083 ,  A61C13/20 ,  A61C13/00 ,  C04B35/488

Abstract: The invention relates to a blank for the production of a molded body, in particular a dental reconstruction. The blank has a base and at least one region that emanates therefrom and projects above the base, from which at least a part of the molded body can be derived by working.

公开(公告)号：US20230249379A1

公开(公告)日：2023-08-10

申请号：US17592677

申请日：2022-02-04

Applicant: DENTSPLY SIRONA INC.

Inventor： Stefan FECHER ,  Lothar VÖLKL ,  Sven GIESE ,  Tobias RÖSCH ,  Andreas GEBHARDT

IPC: B28B3/08 ,  B28B11/24

CPC classification number: B28B3/08 ,  B28B11/243

Abstract: A method for forming a multi-layer blank of a ceramic material including the steps of: providing a mold that includes at least one side wall surrounding a lower press plunger to form a cavity therebetween, wherein the lower press plunger has a movable pin; filling into the mold a first ceramic material; extending the movable pin from an upper surface of the lower press plunger and into the cavity; pressing a first upper press plunger against the first ceramic material so that a first open cavity is formed while at least a portion of the first upper press plunger is in contact with the movable pin to maintain the through-hole through the first layer; filling into the mold a second ceramic material of a different composition; extending the movable pin from an upper surface of the first layer and into the first open cavity; and pressing a second upper press plunger against the second layer so that a second open cavity is formed in communication with the through-hole that extends through the first and second layers to form the blank.

公开(公告)号：US20210290351A1

公开(公告)日：2021-09-23

申请号：US17267698

申请日：2019-08-01

Applicant: DENTSPLY SIRONA Inc.

Inventor： Lothar VOELKL ,  Stefan FECHER ,  Martin KUTZNER ,  Tanja OEFNER ,  Christian KOHLER ,  Tobias KRANZ ,  Andreas GEBHARDT ,  Martin HAIZMANN ,  Heiner HOERHOLD ,  Andrea BURNS

IPC: A61C13/08 ,  A61C13/00 ,  A61C13/083 ,  A61K6/818 ,  A61K6/822 ,  C04B35/488 ,  C04B35/645

Abstract: The present invention is related to a method for the manufacture of a multilayer blank, having a lowermost layer and a topmost layer, of a ceramic material, where layers of different compositions are introduced layer-by-layer into a mold, compressed and then sintered and where individual layers contain at least one coloring oxide, wherein as a first coloring oxide as the one coloring oxide at least one oxide from the group Co, Mn, Ni, Cr is used, the proportion of which in the lowermost layer containing the first coloring oxide is lower than in the topmost layer containing the first coloring oxide: and at least one oxide from the group Pr, Er, Fe, Ti, V, Bi, Cu, Tb is used as the second coloring oxide, the proportion of which in the lowermost layer containing the second coloring oxide is greater than that in the topmost layer.