An in Vivo Study for the Color Influence of Resin Cements onthe Color of Thin VeneersFabricated withTwo Different Techniques (IPS E-Max Press andIPS E-Max CAD)

This study aims to recognize the effect of Variolink Veneer (V.V) cement colors used in luting thin veneers fabricated from (IPS e-max) porcelain on the final resulting color. A sample of (30) thin veneers in (A1-A2-A3-A3,5( colors is used. The veneers were equally divided into two subgroups; the first was manufactured with(Press) technique and the second was manufactured with(CAD-CAM) techniques. The changes between the desired and resulting color are measured for without luting by the(Easyshade Compact) device. Each third of every subgroupwasthen luted with one of the colors of (V.V) (+3),(0),(-3), changes in color were re-measured. Results showed that (V.V-3) presents the favoredresults, while (V.V+3) offers the less favoredresultsfor the desired color. A comparison between the two techniques,showed that (IPS e-max CAD) provides the most favored result more than (IPS e-max press), that is why, (CAD) with (V.V-3) is the best in all combinations