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US 2021/0346131 A1Published application
Colored Zirconia Green Body Restoration
AssigneeB & D Dental Corporation
InventorsYunoh Jung, Daniel Yonil Jung
Life of this patent
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Abstract
A dental block for producing a dental prosthesis comprises a green body including zirconia and having a chemical composition including increasing amounts of yttria through a thickness of the green body. The green body is substantially opaque with a substantially consistent optical characteristic of non-translucency with respect to visible light across the thickness, and is subsequently millable and sinterable to form the dental prosthesis with an optical characteristic of increasing translucency through a thickness of the dental prosthesis.
Claims7
A colored zirconia green body restoration, comprising:
- a) greater than 99 wt % of zirconia, yttria and hafnia;
- b) between 6.0 wt % and 20 wt % of yttria based on a total weight percent of the colored zirconia green body restoration;
- and
- c) zirconia oxide particles having a particle size between 0.1 to 1.0 microns;
- and
- d) the colored zirconia green body restoration being subsequently finally sinterable to produce a translucent zirconia sintered body having a total light transmittance of at least 35% and less than 53% to light with a wavelength at least at a point between 400 nm and 600 nm, and at least 51% and less than 57% to light with a wavelength at least at a point between 600 nm and 800 nm, at a thickness of 0.6 mm.
3 more elements
Dependencies are inferred from the claim text.