Method of masking a dental support structure of a dental prosthesis made of highly translucent ceramic material
AssigneeJames R. Glidewell Dental Ceramics, Inc.
InventorsYan Yang, Sreeram Balasubramanian, Yang Soon Park
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Abstract
A method for masking the appearance of a support structure underlying a highly translucent ceramic dental restoration is provided. The porous form of a zirconia ceramic dental restoration is treated with a liquid masking composition comprising 0.4 wt % to 50 wt % of one or more masking agents. The masking composition is applied to the internal surface of a restoration and a region of the facial surface of the restoration that is opposite the internal surface. After application of the masking compositions, treated zirconia restoration is sintered to greater than 98% theoretical density.
Claims7
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.
Dependencies are inferred from the claim text.