@Article{, title={Influence of Different Zirconia Thickness on the Shear Bond Strength to Porcelain Veneer}, author={1Ruaa Qusai Abdul Hadi and Zahraa Nazar Alwahab}, journal={Journal of Oral and Dental Research مجلة طب الفم والاسنان}, volume={7}, number={2}, pages={24-31}, year={2020}, abstract={Background The high strength and fracture toughness of zirconia have supported its extensive application in dentistry. For esthetic reasons, zirconia has been veneered with porcelain. However, the fracture of veneering porcelain remains one of the primary causes of failure. Objectives The present study aimed to evaluate the effect of different zirconia thicknesses on the shear bond strength of porcelain veneers. Materials and Methods Twenty-one zirconia discs of 10 mm in diameter divided into 3 groups according to the thickness of 1, 2, and 3 mm. According to manufacturer instruction of porcelain buildup, the discs veneered to cylindrical porcelain of 5×3 mm of diameter and height respectively. Shear bond strength test (SBS) was conducted with a crosshead speed of 1 mm/min. Data analyzed by one-way ANOVA, and LSD post hoc test at (p ≤0.05). Results In this study, different thicknesses of zirconia discs show a significantly affected on the shear bond strength to porcelain veneer. Conclusion The increase in the thickness of the zirconia substructure provides a highly significant increase in the mean value of shear bond strength between zirconia and porcelain veneer.

} }