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US 11,939,272 B2Granted
Composition and method for generating a shade gradient in zirconia dental restoration
AssigneeJensen Industries Inc.
InventorsDonald F. Cornell, Yoonho Jun
Life of this patent
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Abstract
Disclosed are compositions and methods for bleaching and optionally coloring a shaded zirconia, particularly mono-chromatic pre-shaded dental zirconia. The compositions and methods are useful in generating a shade gradient in milled dental restorations. The compositions comprise metal salts or complex dissolved in a solvent.
Claims6
A method of generating a color gradient by bleaching a pre-shaded zirconia, the method comprising:
- applying, to the pre-shaded zirconia, a liquid comprising a metal compound or metal compounds comprising one or more metal selected from zinc, gallium, and aluminum in an amount sufficient to cause bleaching by the formation of oxides in the pre-shaded zirconia after sintering at a temperature greater than or equal to 1450° C., and optionally solvent,
- wherein the liquid reduces the intensity of color in the pre-shaded zirconia, and
- wherein the liquid substantially maintains the flexural strength of the pre-shaded zirconia.
Dependencies are inferred from the claim text.