Clinical Performance of Procera AllCeram Crowns

*1695 Clinical Performance of Procera AllCeram Crowns*
A.E. SCHMIDT, B.H. WOLF, M.H. WALTER, and K.W. BOENING, University of Technology Dresden, Germany Objectives: The purpose of this clinical trial was to evaluate the clinical performance and plaque accumulation of Procera AllCeram crowns in anterior and posterior teeth. The Procera AllCeram system (Nobel Biocare AB, Göteborg, Sweden) is a CAD/CAM system to fabricate full-ceramic single crowns with a dry sintered aluminum oxide core. Methods: A total of 107 crowns (61 anterior and 46 posterior crowns) were inserted. Seventy patients (41 women, 29 men) with a mean age of 38.8 years received one or 2 artificial crowns. The clinical performance of the all-ceramic crowns was described by Kaplan-Meyer survivor analyses including the log-rank test for equality of survival distribution between anterior and posterior crowns. The quality of the restorations was evaluated by the rating system of the California Dental Association (CDA). Plaque Index (PI; Silness and Löe, 0-3) was rated at restored teeth and control teeth at 2 weeks, 3 months, 6 months, 12 months, and 18 months after placement. Results: One anterior and three posterior crowns failed due to fracture. The over-all survivor rate at 18 months was 0.96ą0.02 (cumulative survival ą standard error). The survivor rate for anterior all-ceramic crowns was 0.98ą0.02; the posterior crown survivor rate was 0.93ą0.04. The survival distribution of both groups did not differ significantly (p>0.05). The quality of the restorations evaluated by the rating system of the CDA was found to be satisfactory in all functioning crowns. Mean plaque scores ranged from 0.37 to 0.52 for the restored teeth, and from 0.39 to 0.54 for the control teeth. The mean plaque scores did not differ significantly between restored teeth and control at any visit (Wilcoxon-test, p>0.05). Conclusions: It can be concluded, that anterior and posterior Procera AllCeramic crowns are a suitable option for clinical use. Posterior crowns appeared to be more prone to fracture than anterior crowns.
Seq #161 - Clinical Evaluations of Ceramic & Resin-reinforced Restorations 9:00 AM-11:00 AM, Friday, 8 March 2002 San Diego Convention Center Room 3 (Upper Level)
Back to the Dental Materials: IV - Clinical Trials Program Back to the IADR/AADR/CADR 80th General Session (March 6-9, 2002)
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