Translucency and masking ability of a translucent zirconia with different thicknesses over dark backgrounds

ABSTRACT Objectives: To evaluate the translucency, contrast ratio and masking ability of a translucent zirconia with different thicknesses. Methods: Disc shaped specimens (n= 3) 10 mm (Ø) x 1.5 mm, 1 0.7 (thickness) were manufactured simulating all-ceramic simplified restorations. Substrate discs 2; Ø: mm; thickness: 2 mm) simulated composite resin shades: A2 (positive control) C4; metal alloys: silver (Ni-Cr) golden (Cu-Al). Optical properties 9 placed on 3 substrates analyzed by spectrophotometer. The color variation (ΔE00) between each ceramic structure over positive control substrate (A2) dark backgrounds (C4, silvery, golden) obtained as to their subjected non-parametric Kruskal Wallis test (5%). translucency parameter (TP00) (CR) thicknesses also collected one-way ANOVA Tukey Results: showed greater opacity in thickness although it was not statistically 1.0 mm. All significantly affected final restoration all evaluated However, increase decrease ΔE00 values for substrates. Conclusion: able mask substrates, independent thickness.