Evaluation of Marginal Fit of Two Types of Glass Ceramics (In Vitro Study) Journal title: Journal of Dentistry and Oral Sciences Authors: Youssef Y. Ashour1*, Samir I Bakry2, Sanaa H. Abd elkadr2 and Fayzal Elabbasy3 Subject(s): Dentistry and Oral Surgery, Dentistry, Oral Surgery & Medicine, Medical science - Dentistry