Al Aali, K.A., Alresayes, S., Alhenaki, A.M., Vohra, F. and Abduljabbar, T. 2021. Influence of time and hydration (ageing) on flexural strength of Yttrium stabilized Zirconia polycrystals (Y-TZP) fabricated with different CAD-CAM Systems. Pakistan Journal of Medical Sciences. 37, 3 (Mar. 2021). DOI:https://doi.org/10.12669/pjms.37.3.3996.