Purpose: This study evaluated the influence of different ceramics and resin cements on marginal discrepancy, color stability and fracture resistance of ceramic veneers. Material and methods: Sixty sound human maxillary first premolars were prepared for ceramic veneers. Prepared teeth were randomly divided into 3 equal groups according to materials used for construction of laminate veneers. Twenty ceramic veneers were fabricated from Vita Suprinity blocks, other twenty from Vita Enamic blocks and the last from IPS Emprees CAD blocks. Each main group were randomly subdivided equally into two sub groups according to adhesive system used. All samples were subjected to thermo cycling. Marginal discrepancy was measured by stereomicroscope before, after cementation and after thermo cycling and color was measured by digital spectrophotometer before, after cementation then all samples were subjected to fracture. Results: Marginal discrepancy in both Vita Suprinity, Empress CAD and Vita Enamic ceramic veneers were less than 100 μ within acceptable value. The highest color changes recorded with V. Enamic followed by Emp CAD while the lowest color changes recorded with V. Suprinity and this was statistically significant. The highest fracture resistance recorded with V. Suprinity followed by Emp CAD while the lowest fracture resistance recorded with V. Enamic and this was statistically significant.
Conclusions: Ceramic veneers fabricated by Vita Suprinity, Empress CAD and Vita Enamic provided clinically acceptable marginal fit. Vita Suprinity veneers provide more color stability and highest fracture resistance than Empress CAD and Vita Enamic.