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Marginal And Internal Fit Of Monolithic And Veneered Zirconia Crowns, Mai I. Mohammed, Mona H Mandour, Rania A. Shetawey

Al-Azhar Journal of Dentistry

The present study was conducted to evaluate the effect of veneeringzirconia frameworks on the marginal and internal fit of zirconia based restorations.Materials and methods: Forty natural premolars were prepared to receive all-ceramiccrowns. The forty premolars were divided into two groups according to the type of restoration.Group (I) consisted of ten samples restored using monolithic zirconia crowns.Group (II) consisted of thirty samples restored using veneered zirconia frameworks.Group II was subdivided into three equal subgroups according to veneering technique.Subgroup (IIA) veneered using manual layering technique, Subgroup (IIB) veneeredusing Press-on technique and Subgroup (IIC) veneered using CAD-on technique. Allthe finished crowns were cemented …