title: The performance of zirconium dioxide crowns: a clinical follow-up.
abstract: Thirty-two patients who had been treated with 71 computer-aided design/computer-assisted manufacture-fabricated Cercon crowns were followed to assess clinical performance by time-to-event analysis. Clinical examinations consisted of a complete dental and oral hygiene examination and a quality assessment by modified California Dental Association criteria. Four patients (6 crowns) were lost to follow-up; another 11 crowns had to be excluded from evaluation for comparability reasons. Six of 54 evaluated crowns experienced complications (P(C) = 11.1%) throughout a mean observation time of 21 months. Survival was estimated at 0.98 over 24 months. The good overall clinical performance was affected predominantly by technical complications of the veneering ceramic (P(TC) = 9.3%).
authors.affiliation: Department of Prosthodontics, Section of Medical Materials and Technology, Center of Dentistry, Oral Medicine, and Maxillofacial Surgery Tübingen, Tübingen, Germany. martin.groten@med.uni-tuebingen.de
authors.forename: Martin
authors.initials: M
authors.lastname: Groten
authors.forename: Fabian
authors.initials: F
authors.lastname: Huttig
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D017076:Computer-Aided Design; D003442:Crowns; D003776:Dental Porcelain; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D055815:Young Adult; D015040:Zirconium
chemical_list: D003776:Dental Porcelain; D015040:Zirconium; C028541:zirconium oxide