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    METHOD OF MACHINING A DENTAL BLOCK FOR MANUFACTURING A DENTAL RESTORATION
    2.
    发明申请
    METHOD OF MACHINING A DENTAL BLOCK FOR MANUFACTURING A DENTAL RESTORATION 有权

    公开(公告)号：US20220354624A1

    公开(公告)日：2022-11-10

    申请号：US17762122

    申请日：2020-10-08

    Applicant: DENTSPLY SIRONA Inc. ,  SIRONA Dental Systems GmbH

    Inventor： Franz BASLER ,  Oliver NOWARRA ,  Daniel WEISS

    IPC: A61C13/00 ,  A61C5/77

    Abstract: A method of machining a dental block (2) by using at least one dental tool (4) to finish or pre-finish a dental restoration (5) at least completely along the equator (5a) with or without a holding stub (5b). The method includes: a step of moving the axis (4a) of the dental tool (4) along a path (6) with an overlaid lateral motion having an amplitude (A), and without separating an unmachined piece (2″) from the rest of the dental block (2). The path (6) lies away from the equator (5a) at least by an amount equal to half of the diameter of the dental tool (4) plus half of the amplitude (A) of the overlaid lateral motion.

    METHOD OF MANUFACTURING A DENTAL RESTORATION
    3.
    发明申请
    METHOD OF MANUFACTURING A DENTAL RESTORATION 有权

    公开(公告)号：US20220338965A1

    公开(公告)日：2022-10-27

    申请号：US17640966

    申请日：2020-09-21

    Applicant: DENTSPLY SIRONA Inc. ,  SIRONA DENTAL SYSTEMS GMBH

    Inventor： Daniel WEISS ,  Oliver NOWARRA ,  Peter FORNOFF

    IPC: A61C13/00 ,  A61C9/00

    Abstract: A method of manufacturing a dental restoration including a construction step (S2) of preparing construction data for a dental tool machine for machining the dental restoration from a workpiece. The construction data defines at least the geometry of the dental restoration within the workpiece. The method includes a starting step (S3) of starting machining of the dental restoration from the workpiece in accordance with the construction data. The method also includes a preparing step (S4) of starting preparing, before termination of the construction step (S2), the dental tool machine at least through equipping it with all the consumables essential for starting the starting step (S3), and completing preparing the dental tool machine before start of the starting step (S3).

    METHOD OF MACHINING A DENTAL RESTORATION WITH REDUCED CONTOUR FALSIFICATION
    4.
    发明申请
    METHOD OF MACHINING A DENTAL RESTORATION WITH REDUCED CONTOUR FALSIFICATION 有权

    公开(公告)号：US20220331074A1

    公开(公告)日：2022-10-20

    申请号：US17641128

    申请日：2020-09-21

    Applicant: DENTSPLY SIRONA Inc.

    Inventor： Hans-Christian SCHNEIDER ,  Franz BASLER ,  Daniel WEISS

    IPC: A61C13/00

    Abstract: A method of machining at least one dental restoration (1) from a workpiece (2) using one or more dental took (3), including a step of defining, a target contour (4) of the dental restoration (1); also including a step of predicting the deflection of the dental tool (3) during pre-machining through a model based on one or more machining parameters; a step of determining based on the prediction step one or more primary locations (5) at which the target contour (4) would have been damaged during pre-machining; a step of modifying the target contour (4) or the corresponding machining path by adding an oversize of material (6) substantially only at the primary locations (5) for preventing damage; and a step of pre-machining the workpiece (2) based on the modified target contour (17) or the corresponding modified machining path.

    IMPOSING QUALITY REQUIREMENTS ON 3D MODELS WITH SUPPORT STRUCTURES
    5.
    发明申请
    IMPOSING QUALITY REQUIREMENTS ON 3D MODELS WITH SUPPORT STRUCTURES 有权

    公开(公告)号：US20220297385A1

    公开(公告)日：2022-09-22

    申请号：US17634827

    申请日：2020-07-29

    Applicant: DENTSPLY SIRONA Inc.

    Inventor： Simon TANAKA ,  Christian STAHL ,  Daniel WEISS

    IPC: B29C64/40 ,  B29C64/386 ,  B33Y50/00 ,  G05B19/4099

    Abstract: A method of imposing quality requirements on a 3D model including support structures to be built by an additive manufacturing apparatus including: defining the surface geometry and the orientation of the 3D model with respect to the platform, the surface geometry includes surface segments. The method further includes attributing a degree of quality (L;H) to the surface segments respectively against post-processing for the subsequent removal of the support structures calculating, based on the defined orientation, the surface geometry and the degree of quality L;H) attributed; and adding the support structure to the 3D model based on the calculated positions and the degree of quality (L;H) attributed.

    DENTAL MACHINING SYSTEM FOR GENERATING PROCESS PARAMETERS OF THE MACHINING
    6.
    发明申请
    DENTAL MACHINING SYSTEM FOR GENERATING PROCESS PARAMETERS OF THE MACHINING 有权

    公开(公告)号：US20230111090A1

    公开(公告)日：2023-04-13

    申请号：US17911460

    申请日：2021-03-11

    Applicant: DENTSPLY SIRONA Inc.

    Inventor： Sebastian STEGER ,  Oliver NOWARRA ,  Daniel WEISS

    IPC: A61C13/00 ,  B23C3/16 ,  G05B13/02

    Abstract: A dental machining system for manufacturing a dental restoration, including: a dental tool machine which includes: a dental blank holder for holding one or more dental blanks relatively movable with respect to one or more dental tools; one or more driving units each for movably holding at least one dental tool for machining the dental blanks; a determination unit for determining the type of each dental blank; an adjustment device for allowing the user to adjust the machining time, a level of quality of the dental restoration, and a level of security of the dental restoration and dental tool against machining damage. The system further includes a control unit which executes a trained artificial intelligence algorithm adapted to generate process parameters for the machining.

    METHOD OF DETERMINING LAYER THICKNESSES OF 3D MODELS FOR ADDITIVE MANUFACTURING
    8.
    发明申请
    METHOD OF DETERMINING LAYER THICKNESSES OF 3D MODELS FOR ADDITIVE MANUFACTURING 有权

    公开(公告)号：US20220207829A1

    公开(公告)日：2022-06-30

    申请号：US17604471

    申请日：2020-04-24

    Applicant: DENTSPLY SIRONA Inc.

    Inventor： Christian STAHL ,  Daniel WEISS

    IPC: G06T17/20 ,  B29C64/393 ,  B33Y50/02 ,  A61C1/08

    Abstract: The present invention relates to a method of determining layer thicknesses (t) of a three-dimensional model (1) for generation with an additive manufacturing apparatus, the method comprising: a step of determining the layer thicknesses (t) according to an adaptive slicing algorithm in which the thickness of a layer (2) is calculated through a relation based on the inclination of the normal vectors (n) of the surface elements (s) of the 3D model (1) which at least partly enclose the layer (2) from a horizontal direction (x; y) the method being characterized by further comprising: a step of selectively imposing on at least one surface element (s) of the 3D model (1) a precision requirement out of one or more selectable different precision requirements which respectively differently alter in the determination step the relation with respect to the inclination of the normal vector (n) of the said at least one surface element (s) which allows, through the altered relation, the layer thickness (t) to obtain a value smaller or larger than the layer thickness (t) determined through the unaltered relation.

    METHOD OF PREVENTING FLUID COLLECTION / SUCTION IN ADDITIVE MANUFACTURING OF 3D OBJECTS
    9.
    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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