الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Summary
Continuous seek for better esthetic appearance is the motive for development of ceramic veneers. And as a primary factor for the success of veneer restorations is proper choice of cementing material technique, guided also with the ceramic veneer thickness.
Three different luting resins: dual cured resin cement, flowable composite resin and light cured resin cements were used in this study to assess color stability before and after thermocycling aging when luting two different thicknesses of ceramic veneers of thicknesses 0.4 mm and 0.7 mm.
IPS e.max press was used as the ceramic material of the study. RelyX Ultimate was used as the dual cured resin cement of the study. RelyX Veneer was used as the light cured resin cement, and Filtek Z350 was used as the flowable composite resin.
Type of luting resin significantly affected color stability; as dual cured resin cement showed significant color change for cemented veneers after thermocycling aging, however, both light cured resin cement and flowable composite resin showed no significant color change.
Ceramic thickness of cemented veneers showed insignificant effect on color stability of cemented veneers before and after thermocycling aging, however, 0.7 mm thickness showed slightly more color stability than 0.4 mm thickness of ceramic veneer.
Conclusion
Within the limitations of our study, the following conclusions were reached:
• Both Light cured resin cement and flowable composite resin showed high color stability after thermocycling aging.
• Dual cured resin cement showed significant color change after thermocycling aging showing the higher color change than light cured resin cement and flowable composite resin, yet ΔE values were in the acceptable range.
• Both 0.4 and 0.7mm thicknesses of ceramic veneers showed acceptable color masking after thermocycling aging.
Recommendations:
1. Light cured resins are still the gold standard for cementation of esthetic laminate veneers.
2. More clinical studies are needed to verify our results under natural clinical conditions.
3. Newer versions of tertiary amine free dual cured resin cements should be considered in the upcoming researches evaluating their color stability with aging.