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：US20200046465A1

公开(公告)日：2020-02-13

申请号：US16344860

申请日：2017-11-03

Applicant: SIRONA DENTAL SYSTEMS GMBH

Inventor： Oliver NOWARRA ,  Joachim PFEIFFER ,  Peter FORNOFF

IPC: A61C7/16 ,  A61C5/30 ,  A61C8/00

Abstract: The invention relates to a method for contructing at least one dental prosthetic part (20) or a bracket, with at least one adhesive surface (2), in which a 3D model (1) is made of the dental prosthetic part (20). Recesses (3,9,12,15,29,31) are constructed on the adhesive surface (2) of the 3D model (1).

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：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).