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    Method and device for producing a panoramic tomographic image of an object to be recorded
    41.
    发明授权
    Method and device for producing a panoramic tomographic image of an object to be recorded 有权

    公开(公告)号：US11963812B2

    公开(公告)日：2024-04-23

    申请号：US17440358

    申请日：2020-02-25

    Applicant: SIRONA DENTAL SYSTEMS GMBH ,  DENTSPLY SIRONA INC.

    Inventor： Stefan Eichner ,  Markus Hülsbusch

    IPC: A61B6/00 ,  A61B6/03 ,  A61B6/14 ,  A61B6/46 ,  A61B6/51

    CPC classification number: A61B6/5258 ,  A61B6/03 ,  A61B6/461 ,  A61B6/51

    Abstract: The invention relates to a method for producing a panoramic tomographic image (1, 11, 60) of an object (2) to be recorded using a 2D panoramic X-ray device (3), in the course of which X-rays (4) produced by means of an X-ray source (5) irradiate the object (2) and are acquired by means of an X-ray detector (7), wherein, during a movement of the X-ray source (5) and the X-ray detector (7) around the object (2), a number of 2D X-ray projection images (30) are acquired from different acquisition directions (6). A first panoramic tomographic image (1) is calculated from the acquired 2D X-ray projection images (30) using a reconstruction method, wherein the acquired 2D X-ray projection images (30) are modified using a modification method, wherein, from the modified 2D X-ray projection images (40, 50) and using the reconstruction method, a second panoramic tomographic image (11) is calculated with a higher weighting of artifacts (20) relative to anatomical structures (17, 18, 19), wherein a third panoramic tomographic image (60) with significantly reduced artifacts is calculated.

    Method and apparatus for generating a 2D panoramic image
    43.
    发明授权
    Method and apparatus for generating a 2D panoramic image 有权

    公开(公告)号：US11832977B2

    公开(公告)日：2023-12-05

    申请号：US17424951

    申请日：2020-01-23

    Applicant: DENTSPLY SIRONA inc. ,  SIRONA DENTAL SYSTEMS GMBH

    Inventor： Susanne Maur ,  Stefan Eichner

    IPC: A61B6/14 ,  G06T7/73 ,  A61B6/00 ,  G06T3/40

    CPC classification number: A61B6/14 ,  A61B6/5241 ,  G06T3/4038 ,  G06T7/74 ,  G06T2207/10116 ,  G06T2207/30036

    Abstract: The present invention proposes a method for producing a 2D panoramic image of an oral cavity comprising the steps: A) provision of a plurality of projection images acquired during an at least partial revolution of a recording unit comprising a radiation source and an electronic image sensor about the oral cavity in a given position; B) calculation of an image including at least one anatomical feature from the plurality of projection images using a calculation rule with reconstruction parameters; C) provision of a model of the at least one anatomical feature, which describes the at least one anatomical feature in a target position in an image; D) identification of the at least one anatomical feature in the calculated image; E) determination of a deviation between an actual position of the at least one identified anatomical feature in the calculated image and the target position of the at least one anatomical feature in the model by applying a metric; F) variation of at least one of the reconstruction parameters and recalculation of at least one part of the image that shows the at least one anatomical feature using the calculation rule and the at least partially varied reconstruction parameters or variation of a pixel transformation and application of the pixel transformation to at least one part of the calculated image that shows the at least one anatomical feature, so that at least this part of the image is recalculated; G) derivation of the 2D panoramic image from the recalculated image; and H) outputting the 2D panoramic image.

    Individualized dental impression tray
    45.
    发明授权
    Individualized dental impression tray 有权

    公开(公告)号：US11759294B2

    公开(公告)日：2023-09-19

    申请号：US16306753

    申请日：2017-06-02

    Applicant: SIRONA DENTAL SYSTEMS GMBH

    Inventor： Thomas Oskam ,  Vanik Kaufmann-Jinoian

    IPC: A61C9/00 ,  A61C13/00 ,  B33Y50/02

    CPC classification number: A61C9/0006 ,  A61C9/004 ,  A61C13/0004 ,  A61C13/0019 ,  B33Y50/02 ,  A61C13/0006

    Abstract: The invention relates to a method for producing an individualized dental impression tray and to one such impression tray, wherein a digital impression tray model of an individualized impression tray is created on the basis of a digital jaw model, the impression tray model has a carrier with at least one inner surface which at least partially corresponds to a negative form of the jaw model, at least one surface subregion on the inner surface is marked by hand or automatically detected, a retaining structure is arranged above and/or below the surface subregion, the impression tray model is stored with the retaining structure as a production template, and the impression tray is produced by machining according to the production template. The retaining structure has a first surface which extends substantially parallel to the surface subregion or substantially in line with the surface subregion and has at least one recess running through it, wherein a depression adjoins each recess of the first surface, the depression extends from the recess in the direction of the carrier and/or into the carrier, and each depression has at least one undercut.

    Method for the computer-aided editing of a digital 3D model
    46.
    发明授权
    Method for the computer-aided editing of a digital 3D model 有权

    公开(公告)号：US11648096B2

    公开(公告)日：2023-05-16

    申请号：US15300114

    申请日：2015-02-04

    Applicant: SIRONA DENTAL SYSTEMS GMBH

    Inventor： Thorsten Jordan

    IPC: A61C13/00 ,  G06T19/20 ,  A61C13/34 ,  G06F30/00 ,  G16H20/40

    CPC classification number: A61C13/0004 ,  A61C13/34 ,  G06F30/00 ,  G06T19/20 ,  G16H20/40

    Abstract: A method for the computer-aided editing of a digital 3D model (1) of a dental object using digital tools (T1, T2, T3) provides for the identification of different dental-specific regions (R1, R2, R3) of the 3D model (1) that are affected by the tool (T1, T2, T3) in different ways, for computation of the effect on the whole 3D model and for display thereof as a proposal model (2) together with the 3D model (1). The proposal model (2) is then rejected or accepted in part or in full. If it is accepted in part, at least one subregion of the 3D model (1) is selected as a region (10) and a result model (6) is formed from the 3D model (1) and the proposal model (2) by virtue of the 3D model (1) being taken as the starting point for replacing the selected region (10) or at least a central portion of the selected region (10) with a corresponding region of the proposal model (2) or approaching the latter using a strength factor (S).

    METHOD OF PREVENTING FLUID COLLECTION / SUCTION IN ADDITIVE MANUFACTURING OF 3D OBJECTS
    50.
    发明申请
    METHOD OF PREVENTING FLUID COLLECTION / SUCTION IN ADDITIVE MANUFACTURING OF 3D OBJECTS 有权

    公开(公告)号：US20220161500A1

    公开(公告)日：2022-05-26

    申请号：US17442681

    申请日：2020-04-08

    Applicant: DENTSPLY SIRONA Inc. ,  SIRONA DENTAL SYSTEMS GMBH

    Inventor： Christian STAHL ,  Daniel WEISS

    IPC: B29C64/393 ,  B29C64/124 ,  B29C64/245 ,  B29C64/232 ,  B29C64/35 ,  B33Y40/20 ,  B33Y80/00 ,  B33Y50/02 ,  B33Y10/00

    Abstract: The present invention relates to a method of preparing a digital 3D model suitable to be generated and post-processed with an additive manufacturing system (1) comprising: an additive manufacturing apparatus (2) for generating the 3D object (3) corresponding to the prepared digital 3D model, attached to a platform (4) which can be gradually moved upwards, out of a fluid resin (5a) in a vat (6); and at least one post-processing apparatus (7) for performing at least one of washing, drying and curing the 3D object (3) received and maintained in the state attached to the platform (4) during the post-processing, the method comprising: a step of providing the digital 3D model; the method being characterized by further comprising: a step of determining fluid-collecting, basin-like, open regions (8) or fluid-sucking, dome-like, open regions (9) of the digital 3D model orientated in said state relative to the platform (4), and a step of including at least one drain channel (10) and/or at least one vent channel (11) into the fluid-collecting, basin-like, open region (8) and/or the fluid-sucking, dome-like, open region (9) in the digital 3D model respectively for preventing collection of fluid (5a, 5b) or suction of fluid (5a, 5b) during the generation process and the post-processing process.

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