A. Hmedat, S. J., & Ibraheem, A. F. (2013). An in vitro evaluation of fit of the crowns fabricated by zirconium oxide-based ceramic CAD/CAM systems, before and after porcelain firing cycles and after glaze cycles. Journal of Baghdad College of Dentistry, 25(1), 43-48. https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/137