pISSN, eISSN 0125-5614 M Dent J 2017; 37 (2) : 233-242
Original Article
Masking ability of two ceramics with different thicknesses on various substrates Porak Sethakamnerd, Chalermpol Leeviloj Restorative and Implant Dentistry, Faculty of Dentistry, Chulalongkorn University Objective: The objective of this study was to examine the influence of material type, thickness, and substrate color on the masking ability of two ceramics on various substrates. Materials and methods: 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
