Fracture strength of full-contoured ceramic crowns and porcelain-veneered crowns of ceramic copings

Keith J. Ferro, Michael L. Myers, Gerald N. Graser

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This in vitro study compared the fracture strength of Dicor ceramic crowns with a 1 mm axial wall thickness and a 2 mm occlusal thickness with Dicor copings veneered with Vitadur-N or Dicor-Plus porcelain to create similar contours. Tooth preparations for complete crowns were made on human molars with a 10-degree total convergence and a 1 mm shoulder. The artificial crowns were internally etched, given an application of silane, and cemented with a dual-cured resinous cement. After thermocycling, each sample was loaded to failure with a vertical load on the occlusal surface. There were no significant differences in fracture strength between full-contour Dicor crowns and crowns of copings veneered with either Vitadur-N or Dicor-Plus porcelain.

Original languageEnglish (US)
Pages (from-to)462-467
Number of pages6
JournalThe Journal of Prosthetic Dentistry
Issue number5
Publication statusPublished - May 1994


ASJC Scopus subject areas

  • Oral Surgery

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