Effect of cements and beverages on ceramics translucency

Aim To measure translucency of two ceramic materials with different cements and beverages, and compare them to each other. Settings and design In vitro comparative study. Materials and methods One hundred twenty ceramic discs (10 mm diameter, 0.5 mm thickness) from IPS e-max press (n = 60) and Celtra press (n = 60), shade A2 LT were assessed. Two cements [Rely X Ultimate resin cement (RC)] and [Nexus resin-modified glass ionomer cement (RMGIC)] applied to ceramic discs with 0.2 mm thickness through custom-made Teflon mold. Specimens were immersed in two beverages (tea and cola) for 4 h/day for 1 week at room temperature. Translucency parameter (TP) of ceramic discs was measured according to CIE L*a*b* system. Statistical analysis used One-way analysis of variance and Tukey's post-hoc test. Results IPS e-max press showed higher TP values than Celtra press. Discs cemented with RC had higher TP values than those cemented with RMGIC. TP values decreased after immersion in both beverages, with higher TP values to those immersed in cola than those immersed in tea. Conclusion IPS e-max press was more translucent than Celtra press A2 LT discs. RC resin cement could be used to cement veneers with a high final esthetic outcome.