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.

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.