Clinical fit of Procera AllCeram crowns

Statement of Problem. Color stability, strength, and accuracy of fit are the main requirements for complete-ceramic crowns. The Procera AllCeram crown system is a CAD/CAM system used to fabricate individual complete-ceramic crowns that have a dry sintered, aluminum oxide core and appear to match cli...

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Published inThe Journal of prosthetic dentistry Vol. 84; no. 4; pp. 419 - 424
Main Authors Boening, Klaus W., Wolf, Burkhard H., Schmidt, Annette E., Kästner, Kathleen, Walter, Michael H.
Format Journal Article
LanguageEnglish
Published United States Mosby, Inc 01.10.2000
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Summary:Statement of Problem. Color stability, strength, and accuracy of fit are the main requirements for complete-ceramic crowns. The Procera AllCeram crown system is a CAD/CAM system used to fabricate individual complete-ceramic crowns that have a dry sintered, aluminum oxide core and appear to match clinical requirements. However, there are few articles about the clinical fit of all-ceramic crowns. Purpose. This in vivo study measured the accuracy of fit of Procera AllCeram crowns in anterior and posterior teeth. Material and Methods. The clinical fit of 80 anterior and posterior Procera AllCeram crowns was evaluated by a replica technique with a light body silicone to fill space between crown and tooth and a heavy body silicone to stabilize the light body film. After removal from the artificial crowns, the replicas were segmented, and measurements of the film thickness were performed with a light microscope. Results. Medians of mean marginal gap widths were between 80 and 95 μm in anterior teeth and between 90 and 145 μm in posterior teeth. Medians of maximal marginal gap widths ranged from 80 to 180 μm in anterior teeth and from 115 to 245 μm in posterior teeth. Conclusion. The accuracy of fit achieved by Procera AllCeram was comparable to other conventional and innovative systems. (J Prosthet Dent 2000;84:419-24.)
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ISSN:0022-3913
1097-6841
DOI:10.1067/mpr.2000.109125