US 12,268,761 B2
Method of masking a dental support structure of a dental prosthesis made of highly translucent ceramic material
Yan Yang, Irvine, CA (US); Sreeram Balasubramanian, Irvine, CA (US); and Yang Soon Park, Aliso Viejo, CA (US)
Assigned to James R. Glidewell Dental Ceramics, Inc., Newport Beach, CA (US)
Filed by James R. Glidewell Dental Ceramics, Inc., Newport Beach, CA (US)
Filed on May 6, 2024, as Appl. No. 18/655,570.
Application 18/655,570 is a division of application No. 17/166,942, filed on Feb. 3, 2021, granted, now 12,005,131.
Claims priority of provisional application 62/969,236, filed on Feb. 3, 2020.
Prior Publication US 2024/0285479 A1, Aug. 29, 2024
Int. Cl. A61K 6/80 (2020.01); A61K 6/15 (2020.01); A61K 6/818 (2020.01); A61K 6/84 (2020.01); C04B 35/48 (2006.01); C04B 35/63 (2006.01)
CPC A61K 6/818 (2020.01) [A61K 6/15 (2020.01); A61K 6/84 (2020.01); C04B 35/48 (2013.01); C04B 35/6303 (2013.01); C04B 2235/3246 (2013.01); C04B 2235/9661 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A fully sintered yttria-stabilized zirconia dental restoration comprising:
a. a sintered zirconia dental restoration comprising zirconia stabilized with 3 mol % yttria to 8 mol % yttria, comprising
i. an internal surface, and
ii. a facial surface comprising an overlying region opposite the internal surface, a gingival margin, and an incisal region adjacent an incisal edge; and
b. a masking agent selected from Zn, Ti, Al, La, Mg, Sc, Si, Sr, Ca, or a combination thereof;
wherein the dental restoration has a perceptual lightness (L*) value of at least 75 at a location that is on a centerline of the facial surface and that is 69% of a distance from the incisal edge toward the gingival margin, and wherein perceptual lightness is measured using a SpectroShade® Micro II spectrophotometer.