公开(公告)号：US12268564B2

公开(公告)日：2025-04-08

申请号：US15701522

申请日：2017-09-12

Applicant: DENTSPLY SIRONA Inc.

Inventor： Lothar Volkl ,  Stefan Fecher ,  Andreas Gebhardt

IPC: A61C13/08 ,  A61C13/00 ,  A61C13/083 ,  A61C13/087 ,  A61C13/09 ,  A61C13/20 ,  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：US10799326B2

公开(公告)日：2020-10-13

申请号：US15671779

申请日：2017-08-08

Applicant: DENTSPLY SIRONA Inc.

Inventor： Andreas Gebhardt ,  Stefan Fecher ,  Lothar Volkl

IPC: A61C13/00 ,  B23Q3/18 ,  A61C13/08

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 way 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：US11040909B2

公开(公告)日：2021-06-22

申请号：US15160529

申请日：2016-05-20

Applicant: DENTSPLY SIRONA Inc.

Inventor： Lothar Völkl ,  Stefan Fecher

IPC: C03B25/00 ,  C03C17/22 ,  C03C21/00 ,  C03C4/00 ,  C03C3/097 ,  A61K6/20 ,  A61K6/804 ,  A61K6/818 ,  A61K6/822 ,  A61K6/833 ,  A61K6/853 ,  C03C10/00

Abstract: The invention relates to a method to increase the strength of a form body of lithium silicate glass ceramic, which after it has a desired end geometry and after the application of a material which influences its surface to form a coating, is subject to a heat treatment. To create a surface compressive stress through the replacement of lithium ions by alkali ions of greater diameter at least that region not covered by the application layer is covered by a melt or paste consisting of or containing a salt of an alkali metal with ions of greater diameter and the form body is in contact with the melt or paste for a period of time t at a temperature T and the melt or paste is subsequently removed from the form body.

公开(公告)号：US11370702B2

公开(公告)日：2022-06-28

申请号：US15160432

申请日：2016-05-20

Applicant: DENTSPLY SIRONA Inc.

Inventor： Stefan Fecher ,  Lothar Völkl

IPC: C03B32/00 ,  C03C21/00 ,  C03C4/00 ,  C03C3/097 ,  A61K6/804 ,  A61K6/818 ,  A61K6/822 ,  A61K6/824 ,  A61K6/833 ,  A61K6/853 ,  C03B25/00 ,  C03C10/00

Abstract: The invention relates to a method to derive a medical form body of lithium silicate glass ceramic. To increase its strength it is proposed that in the form body comprising lithium silicate glass or containing lithium silicate glass the lithium ions are replaced by alkali ions of greater diameter to generate a surface compressive stress. To this end the form body is covered with a melt containing an alkali metal for which an aliquoted quantity of salt containing the alkali metal is used.

公开(公告)号：US11166794B2

公开(公告)日：2021-11-09

申请号：US16408626

申请日：2019-05-10

Applicant: DENTSPLY SIRONA Inc.

Inventor： Martin Kutzner ,  Stefan Fecher ,  Lothar Völkl

IPC: A61C13/00 ,  A61C13/083 ,  B23Q3/02

Abstract: The invention relates to a support body for a blank, whereby the support body possesses a receiving opening for the blank that is surrounded by an inner circumferential surface, which terminates in an upper and a lower edge, and whereby a blank fixed in position within the support body is bonded to the latter by means of an adhesive agent. In order to be able to easily introduce the adhesive agent into a gap between the blank and the support body it is intended that the inner circumferential surface possesses at least one depression and/or elevation extending to accommodate the adhesive agent.

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.

公开(公告)号：US12251277B2

公开(公告)日：2025-03-18

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: A61C13/00 ,  A61C13/20 ,  B28B3/02 ,  B28B3/08 ,  B30B11/02 ,  B30B15/02 ,  A61C13/09 ,  A61C13/225 ,  B22F3/03 ,  B28B11/24

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：US11833003B2

公开(公告)日：2023-12-05

申请号：US15786030

申请日：2017-10-17

Applicant: DENTSPLY SIRONA Inc.

Inventor： Markus Vollmann ,  Lothar Volkl ,  Stefan Fecher ,  Carsten Wiesner

IPC: A61C13/00 ,  A61C13/083 ,  A61C13/09 ,  A61C5/70 ,  A61C13/08 ,  A61K6/818 ,  A61K6/822 ,  A61K6/824 ,  A61K6/833 ,  A61C5/77 ,  B29C43/14 ,  B29C43/00 ,  B29C43/20 ,  B33Y80/00 ,  A61C9/00

CPC classification number: A61C13/0022 ,  A61C5/70 ,  A61C5/77 ,  A61C13/0006 ,  A61C13/082 ,  A61C13/083 ,  A61C13/09 ,  A61K6/818 ,  A61K6/822 ,  A61K6/824 ,  A61K6/833 ,  B29C43/146 ,  A61C9/0046 ,  B29C43/203 ,  B29C2043/147 ,  B33Y80/00

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.

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：US10531938B2

公开(公告)日：2020-01-14

申请号：US15786631

申请日：2017-10-18

Applicant: DENTSPLY SIRONA Inc.

Inventor： Markus Vollmann ,  Lothar Volkl ,  Stefan Fecher ,  Carsten Wiesner

IPC: A61C13/00 ,  A61C13/08 ,  A61K6/02 ,  C03C10/00 ,  C03C4/00 ,  A61C13/083 ,  C03C3/097 ,  A61C8/00 ,  A61C13/01 ,  A61K6/06 ,  C04B41/51

Abstract: The invention relates to a method for the production of a restoration from a blank consisting of, or containing, a lithium silicate glass ceramic, wherein at least two layers of ceramic material of different compositions are filled into a mold layer-by-layer and after filling of the layers they are then pressed and sintered, wherein after filling of a first layer this is structured on its surface in such a way that the first layer, viewed across its surface, differs in its height from region to region, and then a layer with a composition that differs from the first layer is filled as a second layer into the mold. After sintering the dental restoration is produced from the blank by mechanical working.