The Influence of Different Ceramics and Resin Cements. On the Marginal Discrepancy, Color Stability and Fracture Resistance of Ceramic Laminate Veneers

      Аннотация: This study evaluated influence of different ceramics and resin cements on marginal discrepancy, color stability and fracture resistance of ceramic veneers.Sixty sound human maxillary first premolars were prepared for ceramic veneers.Twenty ceramic veneers were fabricated from Vita Suprinity, other twenty from Vita Enamic and the last from IPS Emprees CAD. Each main group were 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 statistically significant.The highest fracture resistance recorded with V. Suprinity followed by Emp CAD while the lowest fracture resistance recorded with V. Enamic and statistically significant.

Ключевые слова: ceramic laminate veneers, Thermocycling, Color Changes