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    PROCESS OF MANUFACTURING A DENTAL MILLING BLOCK WITH A HOMOGENEOUS COLOR AND/OR TRANSLUCENCY GRADIENT
    4.
    发明公开
    PROCESS OF MANUFACTURING A DENTAL MILLING BLOCK WITH A HOMOGENEOUS COLOR AND/OR TRANSLUCENCY GRADIENT 审中-公开

    公开(公告)号：US20230270529A1

    公开(公告)日：2023-08-31

    申请号：US18015338

    申请日：2021-07-19

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Martin Goetzinger ,  Hans R. Schnagl

    IPC: A61C13/00 ,  A61K6/802 ,  B28B3/00 ,  B28B11/24 ,  B01F23/60 ,  B01F27/231 ,  B01F27/806

    CPC classification number: A61C13/0022 ,  A61K6/802 ,  B28B3/00 ,  B28B11/24 ,  B01F23/60 ,  B01F27/2312 ,  B01F27/806

    Abstract: The invention relates to a process of manufacturing a dental milling block with a homogeneous color and/or translucency gradient. This process comprises the steps of providing a mold with a cavity having a z-direction and an x/y-direction, filling the cavity partially with a first powder up to a height H1, the first powder having a volume VP1 with a top and bottom surface, introducing a second powder on top of the first powder up to a height H2, the second powder having a volume VP2 with a top and bottom surface and, the top surface of the first powder being in contact with the bottom surface of the second powder and forming an intermediate region, providing a mixer unit with at least one rotatable mixing element, introducing the rotating mixing element in z-direction into the intermediate region, mixing the powder located in the intermediate region by rotating the mixing element, removing the rotating mixing element from the powder, compacting the powder, optionally applying heat to the compacted powder, the first powder differing from the second powder by its physical properties and/or chemical composition and/or color. The invention also relates to a process of producing a dental restoration using dental milling block obtainable according to this process.

    Method of making a dental articles
    10.
    发明授权
    Method of making a dental articles 有权

    公开(公告)号：US11202694B2

    公开(公告)日：2021-12-21

    申请号：US15744930

    申请日：2016-07-11

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Malte Korten ,  Helmar B. Mayr ,  Gioacchino Raia ,  Daniel D. Oberpertinger ,  Martin Goetzinger ,  Peter Bissinger

    IPC: A61C13/00 ,  B33Y30/00 ,  B29C64/20 ,  B29C64/165

    Abstract: A method of making a dental article, has steps of (i) providing a layer of sinter powder, (ii) providing a solidifiable binder to form a circumferential fixation zone (114) which encloses a portion of the powder layer. The method further has the step of repeating steps (i) and (ii) with each fixation zone (114) of one layer being in contact with a fixation zone (114) of an adjacent layer such that a plurality of the fixation zones (114) together form a coherent hollow sleeve (116) extending across the layers. The corresponding plurality of powder portions in combination form a contiguous batch (118) of powder captured in the sleeve. The method facilitates the manufacturing of sintered dental articles.

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