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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.
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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.
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公开(公告)号：US11427504B2
公开(公告)日：2022-08-30
申请号：US15159427
申请日：2016-05-19
Applicant: DENTSPLY SIRONA Inc.
Inventor： Markus Vollmann , Udo Schusser
IPC: C03C21/00 , A61C13/083 , A61C5/77 , A61C13/08 , C03C4/00 , C03C3/097 , A61K6/818 , A61K6/822 , A61K6/833 , A61K6/853 , C03C10/00
Abstract: The invention relates to a method to produce a dental structure with a cavity having a negative form of the structure, which is formed in an investment material, wherein flowable lithium silicate glass ceramic is pressed into the cavity. Thereby a compressive surface stress is created in the ceramic structure through the replacement of lithium ions by alkali ions, in that the model is enriched with alkali compounds and/or the model is covered with a layer of a material containing alkali ions.
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公开(公告)号：US20180256297A1
公开(公告)日：2018-09-13
申请号：US15453610
申请日：2017-03-08
Applicant: DENTSPLY SIRONA Inc.
Inventor： Markus Vollmann
CPC classification number: A61C13/0018 , A61C5/20 , A61C5/77 , A61C8/0001 , A61C13/0022 , A61C13/0024 , C03C3/097 , C03C4/0021 , C03C10/0009 , C03C23/001 , C03C2205/06
Abstract: The invention relates to a method for producing a monolithic form body, in particular a dental restoration, comprising the steps of: providing of a blank, producing of the form body through pressing and/or machining of the blank, and softening of the form body exclusively in its surface region by irradiation with infrared radiation.
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Patent Agency Ranking
公开(公告)号：US20180099900A1
公开(公告)日：2018-04-12
申请号：US15717565
申请日：2017-09-27
Applicant: DENTSPLY SIRONA Inc.
Inventor： Markus Vollmann , Irmgard WISSEL , Marcel MEEGDES , Carsten WIESNER
CPC classification number: C03C10/0027 , A61C13/0022 , C03B32/02 , C03C3/097 , C03C4/0021 , C03C2204/00
Abstract: The invention relates to a lithium silicate glass ceramic, which contains at least lithium disilicate as a crystal phase, and lithium aluminum silicate as further crystal phase. The lithium silicate glass ceramic in its initial composition contains Al2O3 at 1.5 to 3.5 percent by weight, and K2O at 0.6 to 1.8 percent by weight.
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公开(公告)号：US10745319B2
公开(公告)日：2020-08-18
申请号：US15160678
申请日：2016-05-20
Applicant: DENTSPLY SIRONA Inc.
Inventor： Michael Pröpster , Markus Vollmann
IPC: C03B32/00 , C03C21/00 , C03C4/00 , C03C3/097 , A61K6/804 , A61K6/818 , A61K6/822 , A61K6/833 , A61K6/853 , C03B25/00 , C03C10/00 , C03C17/22
Abstract: The invention relates to a method to produce a medical form body of lithium silicate glass ceramic. To increase its strength it is proposed that a surface compressive stress is created in a form body of lithium silicate glass, or containing lithium silicate glass, through the replacement of lithium ions by alkali metal ions of greater diameter. For this purpose the form body is covered with a paste that contains alkali metal.
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公开(公告)号：US10537411B2
公开(公告)日：2020-01-21
申请号：US15453610
申请日：2017-03-08
Applicant: DENTSPLY SIRONA Inc.
Inventor： Markus Vollmann
Abstract: The invention relates to a method for producing a monolithic form body, in particular a dental restoration, comprising the steps of: providing of a blank, producing of the form body through pressing and/or machining of the blank, and softening of the form body exclusively in its surface region by irradiation with infrared radiation.
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公开(公告)号：US11117829B2
公开(公告)日：2021-09-14
申请号：US16527122
申请日：2019-07-31
Applicant: DENTSPLY SIRONA Inc.
Inventor： Markus Vollmann , Irmgard Wissel , Marcel Meegdes , Carsten Wiesner
Abstract: The invention relates to a lithium silicate glass ceramic, which contains at least lithium disilicate as a crystal phase, and lithium aluminum silicate as further crystal phase. The lithium silicate glass ceramic in its initial composition contains Al2O3 at 1.5 to 3.5 percent by weight, and K2O at 0.6 to 1.8 percent by weight.
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公开(公告)号：US10407341B2
公开(公告)日：2019-09-10
申请号：US15717565
申请日：2017-09-27
Applicant: DENTSPLY SIRONA Inc.
Inventor： Markus Vollmann , Irmgard Wissel , Marcel Meegdes , Carsten Wiesner
Abstract: The invention relates to a lithium silicate glass ceramic, which contains at least lithium disilicate as a crystal phase, and lithium aluminum silicate as further crystal phase. The lithium silicate glass ceramic in its initial composition contains Al2O3 at 1.5 to 3.5 percent by weight, and K2O at 0.6 to 1.8 percent by weight.
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