公开(公告)号：US10898302B2

公开(公告)日：2021-01-26

申请号：US16095433

申请日：2017-10-21

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Rainer K. Dittmann ,  Hans R. Schnagl ,  Grit Kindler ,  Björn Theelke ,  Michael Sogl ,  Michaela Urban

IPC: A61C13/00 ,  A61C13/083 ,  A61C13/08 ,  C04B35/48

Abstract: The invention relates to a porous multi-layered coloured zirconia dental mill blank comprising a bottom layer B having the composition COMP-B which comprises ceramic components CER-COMP-B, colouring components COL-COMP-B and stabilizing components STAB-COMP-B, a top layer E having the composition COMP-E which comprises ceramic components CER-COMP-E, colouring components COL-COMP-E stabilizing components STAB-COMP-E, at least one intermediate layer Ex having the composition COMP-E of top layer E, at least one intermediate layer Bx having the composition COMP-B of bottom layer B, x being an integer and indicating the number of intermediate layers, wherein the layers with compositions COMP-B and COMP-E are arranged in alternating order, and wherein the thickness of the individual layers B, Bx is decreasing from bottom to top and the thickness of the individual layers E, Ex is decreasing from top to bottom. The dental mill blank can be used for producing dental articles.

公开(公告)号：US20210386519A1

公开(公告)日：2021-12-16

申请号：US17250966

申请日：2019-10-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Andreas G. Herrmann ,  Malte Korten ,  Bastian P. Kirchner ,  Daniel D. Oberpertinger ,  Philipp Jurgen Semmler ,  Anja Friedrich ,  Michaela Urban

IPC: A61C5/77 ,  A61C5/73 ,  B33Y80/00

Abstract: The invention relates to a 3d-printed dental restoration precursor, a 3d-printed array comprising a 3d-printed dental restoration precursor, a kit of parts comprising at least two 3d-printed dental restoration precursors or 3d-printed dental restorations and a process of producing such a 3d-printed array, 3d-printed dental restoration precursor or 3d-printed dental restorations. The 3d-printed dental restoration precursor comprises at least one crown unit having an outer surface and an inner surface and at least one support element having a fixation section. The support element is connected through the fixation section to the outer surface of the crown unit in a particular region.