	US 11,813,341 B2
	Dental product with enhanced toughness
Yuta Tajima, Aichi (JP); Toshio Sakakibara, Aichi (JP); and Kiyoko Ban, Aichi (JP)
Assigned to KURARAY NORITAKE DENTAL INC., Kurashiki (JP)
Appl. No. 16/761,551
Filed by KURARAY NORITAKE DENTAL INC., Kurashiki (JP)
PCT Filed Nov. 6, 2018, PCT No. PCT/JP2018/041204 § 371(c)(1), (2) Date May 5, 2020, PCT Pub. No. WO2019/093334, PCT Pub. Date May 16, 2019.
Claims priority of application No. 2017-214496 (JP), filed on Nov. 7, 2017.
Prior Publication US 2021/0169747 A1, Jun. 10, 2021
Int. Cl. A61K 6/818 (2020.01); A61C 5/77 (2017.01); A61K 6/20 (2020.01); A61C 8/00 (2006.01); C04B 41/50 (2006.01); C04B 41/87 (2006.01); A61K 6/58 (2020.01); A61C 7/14 (2006.01); A61C 13/083 (2006.01); C04B 111/00 (2006.01)

CPC A61K 6/818 (2020.01) [A61C 5/77 (2017.02); A61C 7/14 (2013.01); A61C 8/0013 (2013.01); A61K 6/20 (2020.01); A61K 6/58 (2020.01); C04B 41/5038 (2013.01); C04B 41/87 (2013.01); A61C 13/083 (2013.01); C04B 2111/00836 (2013.01); C04B 2237/348 (2013.01)]

13 Claims

1. A dental product comprising:

a base material formed of a zirconia sintered body; and

a porcelain layer formed by sintering porcelain,

wherein the porcelain comprises ceramic, glass, or glass-ceramic, and comprises 65.0 to 90.0 mol % of SiO₂, 4.0 to 15.0 mol % of Al₂O₃, 0.1 to 10.0 mol % of Na₂O, 1.0 to 10.0 mol % of K₂O, and 0.01 to 15.0 mol % of CaO, and optionally less than 0.1 mol % of Li₂O based on total 100 mol % of constituent components. and has a suitable firing temperature of 1050° C. or more, and the porcelain layer has a fracture toughness value of 1.20 MPa·m^0.5or more.