公开(公告)号：US11253436B2

公开(公告)日：2022-02-22

申请号：US16092626

申请日：2017-04-24

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Andreas Herrmann ,  Michael Jahns ,  Rainer K. Dittmann ,  Grit Kindler ,  Dajana Maria Anna Zimmermann

IPC: A61K6/822 ,  A61C13/00 ,  A61C13/083 ,  A61C5/77 ,  C04B35/486 ,  A61K6/818

Abstract: A method of making a monolithic dental restoration. The method includes the steps of providing a monolithic precursor of a dental restoration and firing the monolithic dental restoration precursor to provide the monolithic dental restoration. The zirconia material of both the dental restoration precursor as well as the dental restoration has a relative density of greater than 98% of the theoretic density of the zirconia material. The invention helps providing a color of a non-glazed dental restoration which resembles the color of a glazed dental restoration.

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：US20190117521A1

公开(公告)日：2019-04-25

申请号：US16092626

申请日：2017-04-24

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Andreas Herrmann ,  Michael Jahns ,  Rainer K. Dittmann ,  Grit Kindler ,  Dajana Maria Anna Zimmermann

IPC: A61K6/02 ,  C04B35/486 ,  A61C13/00 ,  A61C13/083 ,  A61C5/77

Abstract: A method of making a monolithic dental restoration. The method includes the steps of providing a monolithic precursor of a dental restoration and firing the monolithic dental restoration precursor to provide the monolithic dental restoration. The zirconia material of both the dental restoration precursor as well as the dental restoration has a relative density of greater than 98% of the theoretic density of the zirconia material. The invention helps providing a color of a non-glazed dental restoration which resembles the color of a glazed dental restoration.