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Volume 24 , Issue 2
March/April 2011

Pages 144–146


Radiopacity of Zirconia-Based All-Ceramic Crown Systems

Francisco Martínez-Rus, DDS, Dr Odont/Ana M. García, DDS/Antonio H. de Aza, PhD/Guillermo Pradíes, DDS, Dr Odont


PMID: 21479282

The aim of this study was to evaluate the radiopacity of the core and veneer ceramics in four zirconia-based crown systems: In-Ceram Zirconia, In-Ceram YZ, Procera Zirconia, and Cercon. Two-millimeter-thick restoration slices were prepared and digitally radiographed alongside an aluminum stepwedge. The grayscale data were converted into millimeters of aluminum by an image analysis program. The two-way analysis of variance test detected significant differences with respect to all-ceramic system, layer ceramic, and the interaction of the two factors (P = .0001). All materials presented radiopacity values above the minimum recommended by the International Organization for Standardization. Int J Prosthodont 2011;24:144–146.


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