Color Masking Ability of Three Dental Ceramics with Different Translucencies

Abstract

Purpose: the aim of this study was to evaluate the color masking ability of three dental ceramics with different translucencies. Materials and methods: Fifty-four discs of ceramics were made from three dental ceramic materials (High translucency zirconia, low translucency IPS E.max CAD and translucent Vita Suprinity). Shade of three dental ceramics was A2. They were divided into three equal groups (n=18). Each group was subdivided into three subgroups (n=6) according to composite substrate shade (A4, B4, C4) on which each ceramic disc was cemented with translucent resin cement. Color difference(∆E) and translucency parameter (TP) were evaluated by spectrophotometer.Results: Before cementation, IPS E.max showed the highest median TP values. As regards color change, no statistically significant difference between the three dental ceramic types was found. Also, non-statistical significance difference between three shades of composite substrate (A4, B4, C4). Conclusions: IPS E.max (low translucency) shows better translucency than translucent vita suprinity and High translucency zirconia.In all types of ceramics, there was statistically significant decrease in translucency parameter (TP) after cementation with translucent resin cement. The color changes (∆E) exceeded the perceptible limit for the three types of dental ceramic, so it was concluded that the tested ceramics didn't exhibit sufficient color masking ability to hide the dark substrate of the composite shades used (A4, B4, C4).

Effect of Cement Translucency and Ceramic Thickness on the Resulting Colour Match of Zirconia-Reinforced Lithium Silicate Restorations Cemented over Dark-Coloured Substrate

“…A low-speed diamond saw was used to cut 54 disc-shaped Vita Suprinity specimens with an 8 mm diameter into 18 discs of each thickness (0.5, 1 and 1.5 mm) (12,13) . (Fig.…”