公开(公告)号：US20220331073A1

公开(公告)日：2022-10-20

申请号：US17640938

申请日：2020-09-21

Applicant: DENTSPLY SIRONA Inc. ,  SIRONA DENTAL SYSTEMS GMBH

Inventor： Peter FALTIN ,  Oliver NOWARRA

IPC: A61C13/00 ,  A61C3/02 ,  B23Q39/02 ,  B24B27/00

Abstract: A computer-implemented method of planning of the shapes of free-form tool paths (P) for simultaneous two-sided machining of a dental restoration (1) having an individual free-form target geometry from a workpiece (2) by using a dental tool machine (3) having at least two tool spindles each having at least one tool (4) arranged on a different side of the workpiece (2) which is simultaneously movable along an axis (y) relative to the tools (4) thereby imposing a kinematic axis coupling. The method includes a step of determining transformations (T′, T″) of the target geometry by which the kinematic axis coupling is converted into a common coupling parameter for both tools (4); and a step of generating dependent on these transformations (T′, T″) the shapes of the free-form tool paths (P) in which the common coupling parameter is identical in time for all participating tool spindles that are driven simultaneously.

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.

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.

公开(公告)号：US20200179082A1

公开(公告)日：2020-06-11

申请号：US16708531

申请日：2019-12-10

Applicant: DENTSPLY SIRONA INC.

Inventor： Hans-Christian SCHNEIDER ,  Oliver NOWARRA ,  Daniel WEIß ,  Peter FORNOFF

IPC: A61C5/77 ,  A61C13/00

Abstract: The present invention relates to a method for the design and manufacture of a dental component with a surface, wherein a 3D model of the dental component is designed by means of a CAD unit and the dental component is manufactured by a CAM unit on the basis of the 3D model. In order to provide a method which significantly shortens the time required for the design and manufacture of a dental component, so that the length of the dental session at which the patient must be present is shortened, it is inventively proposed that the 3D model is manufactured in at least one first design step, in which a first 3D submodel is designed with at least one first surface section, and a second design step in which a second 3D submodel is designed with at least one second surface section, wherein the first design step is completed before the second design step and the CAM unit begins the manufacture of the first surface section of the dental component based on the first 3D submodel before the design of the second 3D submodel is completed.

公开(公告)号：US20240051041A1

公开(公告)日：2024-02-15

申请号：US17641218

申请日：2020-09-24

Applicant: DENTSPLY SIRONA Inc. ,  SIRONA DENTAL SYSTEMS GMBH

Inventor： Andreas SCHAEFER ,  Oliver NOWARRA ,  Michael TURZER ,  Peter FORNOFF

IPC: B23C5/00 ,  A61C13/00 ,  G06K19/07

CPC classification number: B23C5/006 ,  A61C13/0004 ,  G06K19/0723 ,  A61C2204/005

Abstract: A dental tool (1) for use in a dental CNC milling/grinding machine for machining a dental restoration from a workpiece (6), the dental tool (1) has a shaft (2). The dental tool includes a miniaturized RFID tag (3) which is arranged in front of the back end (2a) of the shaft (2). A dental CNC milling/grinding machine (5) is also disclosed and has a machine compartment (5a) including one or more carriage units (5b) each adapted to exchangeably receive and drive one or more dental tools (1) for machining a dental restoration from a workpiece (6); one or more transceiver units (5c) each adapted to read and/or write the miniaturized RFID tag (3) of a dental tool (1); and a control unit adapted to control the transceiver units (5c), and the carriage units (5b) based on the information read from the miniaturized RFID tags (3).

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).

公开(公告)号：US20220000593A1

公开(公告)日：2022-01-06

申请号：US17291532

申请日：2019-11-14

Applicant: DENTSPLY SIRONA INC.

Inventor： Philipp GRIMM ,  Oliver NOWARRA

IPC: A61C13/00 ,  A61C13/083 ,  A61C3/02

Abstract: In the method for producing medical, in particular dental fitting bodies with a specified or custom three-dimensionally curved outer contour or preform of the fitting body with a rough outer contour, which has an allowance relative to the outer contour, a workpiece, from which the fitting body or its preform is produced, is machined in a material-removing manner by means of a tool engaging in the workpiece. The tool path has directional components transverse to the run of the contour to be produced and the cutting edges have a defined geometry. The tool engages into the workpiece at a cutting arc angle alpha of the circumferential surface of less than 90° on average and at an insertion depth of at least twice the tool diameter (D) and the machining of the workpiece occurs along a tool path with directional components contrary to a machining direction following the outer contour.