Abstract :
Introduction: Aim of this study was to examine the influence of material type, thickness, and substrate color on the masking ability of two ceramics over different substrates.
Materials and Method: In total, 36 disc-shaped specimens (15 mm in diameter × 0.5- and 1.0-mm thicknesses) were fabricated from lithium disilicate glass ceramic (IPS e.max Press, n = 6), high-translucent zirconia (Lava Plus, n = 6), and high-translucent zirconia with liner material (Lava Plus/Liner, n = 6). Contrast ratios were measured over white and black substrates. Color differences were measured over different substrates: white, black, metal, and resin composite shades A2, A3, and C4. White and A2 substrates were used as reference groups. Contrast ratio and color difference values were analyzed with linear regression (P
Keyword :
Contrast ratio, Lithium disilicate ceramics, Masking ability, Zirconia ceramics