US 12,006,247 B2
Lithium silicate materials
Elke Signer-Apel, Oberschan (CH); Wolfram Höland, Schaan (LI); Marcel Schweiger, Chur (CH); Christian Ritzberger, Nenzing (AT); Harald Bürke, Frastanz (AT); and Volker Rheinberger, Vaduz (LI)
Assigned to Ivoclar Vivadent AG, Schaan (LI)
Filed by Ivoclar Vivadent AG, Schaan (LI)
Filed on Apr. 19, 2021, as Appl. No. 17/233,898.
Application 12/253,437 is a division of application No. 11/348,053, filed on Feb. 6, 2006, granted, now 7,452,836, issued on Nov. 18, 2008.
Application 17/233,898 is a continuation of application No. 16/284,563, filed on Feb. 25, 2019, granted, now 10,981,823.
Application 16/284,563 is a continuation of application No. 15/255,443, filed on Sep. 2, 2016, granted, now 10,214,443, issued on Feb. 26, 2019.
Application 15/255,443 is a continuation of application No. 14/567,173, filed on Dec. 11, 2014, granted, now 9,434,639, issued on Sep. 6, 2016.
Application 14/567,173 is a continuation of application No. 13/940,362, filed on Jul. 12, 2013, granted, now 8,940,651, issued on Jan. 27, 2015.
Application 13/940,362 is a continuation of application No. 13/175,370, filed on Jul. 1, 2011, granted, now 8,546,280, issued on Oct. 1, 2013.
Application 13/175,370 is a continuation of application No. 12/944,578, filed on Nov. 11, 2010, granted, now 7,993,137, issued on Aug. 9, 2011.
Application 12/944,578 is a continuation of application No. 12/253,437, filed on Oct. 17, 2008, granted, now 7,871,948, issued on Jan. 18, 2011.
Claims priority of application No. 05002588 (EP), filed on Feb. 8, 2005; and application No. 102005028637.2 (DE), filed on Jun. 20, 2006.
Prior Publication US 2021/0238082 A1, Aug. 5, 2021
Int. Cl. C03C 10/00 (2006.01); A61C 5/70 (2017.01); A61C 5/77 (2017.01); A61C 8/00 (2006.01); A61C 13/00 (2006.01); A61C 13/08 (2006.01); A61C 13/083 (2006.01); A61K 6/78 (2020.01); A61K 6/804 (2020.01); A61K 6/807 (2020.01); A61K 6/818 (2020.01); A61K 6/833 (2020.01); C01B 33/32 (2006.01); C03B 32/02 (2006.01); C03C 3/097 (2006.01); C03C 4/00 (2006.01)
CPC C03C 10/0027 (2013.01) [A61C 5/70 (2017.02); A61C 5/77 (2017.02); A61C 8/0001 (2013.01); A61C 8/0012 (2013.01); A61C 8/0048 (2013.01); A61C 13/0004 (2013.01); A61C 13/0006 (2013.01); A61C 13/0022 (2013.01); A61C 13/082 (2013.01); A61C 13/083 (2013.01); A61K 6/78 (2020.01); A61K 6/804 (2020.01); A61K 6/807 (2020.01); A61K 6/818 (2020.01); A61K 6/833 (2020.01); C01B 33/32 (2013.01); C03B 32/02 (2013.01); C03C 3/097 (2013.01); C03C 4/0021 (2013.01); C03C 10/0045 (2013.01); C03C 10/0054 (2013.01); Y10T 83/04 (2015.04); Y10T 409/303752 (2015.01)] 5 Claims
 
1. A lithium silicate glass ceramic for dental restorations, wherein the lithium silicate glass ceramic comprises:
SiO2 from 64 to 75 wt %; and
a main crystalline phase of lithium metasilicate;
wherein the glass ceramic is suitable to be subjected to a heat treatment to convert the main crystalline phase from lithium metasilicate to lithium disilicate and the glass ceramic has a biaxial flexural strength of between 450-820 MPa.