Patent ID: 9668837
Date: 2017-06-06
CPC Classifications: A61C,A61K,B32B,C04B,Y10T

Claim:
1. A dental block device for producing a dental prosthesis, the dental block device comprising: a) a green body comprising zirconia; b) the green body having multiple different layers each having a different chemical composition between adjacent layers; c) the green body having a first chroma component mainly in one half of the blank, and a second chroma component mainly in another half of the blank, with the second chroma component not extending into the half with mainly the first chroma component; d) the green body being substantially opaque and white; and e) the green body having a brightness/lightness L* value between 10 to 30 for a pre-sintered green body zirconia sample thickness of 1 to 1.3 mm in accordance with CIE L*a*b* colorimetric system wherein, when measured for L* value of a CIE L*a*b* colorimetric system using the VITA Easyshade® Compact spectrophotometer, the L* value of the pre-sintered green body zirconia sample is read with the reading tip of the spectrophotometer to be set flush with, in close touching contact, and perpendicular to the measured surface of the pre-sintered green body zirconia sample.