Objective To evaluate the aesthetic outcomes of all-ceramic restorations by using four different porcelain materials on mimic-tetracycline pigmentation backgrounds.Methods The translucency parameters (TP) of four different all-ceramic restorations (IPS e.max, Cercon, Lava, and Girrbach) were measured under white and black back grounds by using Datacolor 600, and the TP of each group (n=8) was calculated. Five different mimic-tetracycline pigmentation teeth wereprinted with differentcolors by using acolorized printer as theprepared teeth backgrounds, under which the colorpara-meters of each group were measured. The color differences with a standard 2M2 sample were calculated.Results The TP values of theall-ceramicrestorations were 15.67±0.58 for IPS e.max, 9.73±0.43 for Girrbach, 9.55±0.25 for Lava,and7.56±0.43 for Cercon. The TP value of the IPS e.max group was significantly higher than those of the other three groups (PConclusion The IPS e.max group has favorable TP. IPS e.max shows better aesthetic effects than the others when restoring mimic-tetracycline pigmentation teeth (on yellow background). Lava and Girrbach show better aestheticeffects on mimic-tetracycline pigmentation teeth(on gray, dark gray, dark red, and lightred backgrounds).
