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  • Title: A comparison of the marginal fit of In-Ceram, IPS Empress, and Procera crowns.
    Author: Sulaiman F, Chai J, Jameson LM, Wozniak WT.
    Journal: Int J Prosthodont; 1997; 10(5):478-84. PubMed ID: 9495168.
    Abstract:
    The in vitro marginal fit of three all-ceramic crown systems (In-Ceram, Procera, and IPS Empress) was compared. All crown systems were significantly different from each other at P = 0.05. In-Ceram exhibited the greatest marginal discrepancy (161 microns), followed by Procera (83 microns), and IPS Empress (63 microns). There were no significant differences among the various stages of the crown fabrication: core fabrication, porcelain veneering, and glazing. The facial and lingual margins exhibited significantly larger marginal discrepancies than the mesial and distal margins.
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