US 12,453,621 B2
Method for producing a tooth replacement part
Oliver Noworra, Leimen (DE)
Assigned to Dentsply Sirona Inc., York, PA (US)
Appl. No. 17/439,189
Filed by DENTSPLY SIRONA inc., York, PA (US)
PCT Filed Mar. 17, 2020, PCT No. PCT/EP2020/057289
§ 371(c)(1), (2) Date Sep. 14, 2021,
PCT Pub. No. WO2020/187910, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 19164483 (EP), filed on Mar. 21, 2019.
Prior Publication US 2022/0151747 A1, May 19, 2022
Int. Cl. A61C 13/00 (2006.01)
CPC A61C 13/0004 (2013.01) [A61C 13/0022 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for producing a tooth replacement part from a blank using a CAM (Computer-aided manufacturing) processing device,
the blank comprising a blank body made of tooth restoration material, wherein the CAM processing device comprises a holding device for positioning the blank in a processing position, the CAM processing device further comprising a first pin-shaped material-removing processing tool, which is rotatable about a first longitudinal tool axis, and a second pin-shaped material-removing processing tool, which is rotatable about a second longitudinal tool axis, for machining the tooth replacement part from the blank, wherein the two longitudinal tool axes are coupled to one another during the machining, such that both longitudinal tool axes are oriented parallel to one another,
wherein the two processing tools, in the processing position, come into contact with the blank body from opposite sides at least temporarily simultaneously during the machining and, depending on the shape of the tooth replacement part to be machined, are moved along a first movement axis perpendicular to the two longitudinal tool axes and a second movement axis parallel to the two longitudinal tool axes,
wherein the method comprises:
varying an orientation of the blank body in the processing position relative to the two processing tools, the varying comprising:
a first orienting of the blank body and processing tools relative to one another from a first processing orientation into a second processing orientation, the orientation of the blank body relative to the two processing tools in the first processing orientation in relation to the orientation of the blank body relative to the two processing tools in the second processing orientation is pivoted at a first pivot angle about a pivot axis, which is oriented perpendicularly to the two longitudinal tool axes,
wherein the first orienting comprises a pivoting of the orientation of the blank body relative to the two processing tools from the first processing orientation into the second processing orientation simultaneously with a feed movement of at least one of the two processing tools through the tooth restoration material of the blank body during the machining.