title: Clinical evaluation of adhesively placed Cerec endo-crowns after 2 years--preliminary results.
abstract: OBJECTIVE
  Non-vital endodontically treated posterior teeth with complete loss of coronal hard tissues were prepared with a circular equigingival butt margin and central retention cavity of the entire pulp chamber ("endo-preparation"). Computer-generated ceramic corono-radicular restorations (Cerec endo-crowns) were bonded to these preparations. The purpose of this study was to evaluate the survival rate and the clinical quality of CAD/CIM endo-crowns after 2 years.
  
  
  METHODS
  19 Cerec endo-crowns (4 premolars and 15 molars) in 13 patients were examined using modified USPHS criteria at baseline and after an average time of 26 months. The ratings of the two examinations were compared.
  
  
  RESULTS
  The service time of the 19 endo-crowns was 14 to 35.5 (mean +/- SD: 26 +/- 6) months. One molar endo-crown failed after 28 months because of recurrent caries.
  
  
  CONCLUSIONS
  The overall clinical quality of the Cerec endo-crowns was very good, and so far, the clinical concept appears feasible.
authors.affiliation: Division of Esthetic and Computer Restorations, Department of Preventive Dentistry, Periodontology and Cariology, Center for Dental and Oral Medicine, University of Zürich, Zürich, Switzerland. bindl@zzmk.unizh.ch
authors.forename: A
authors.initials: A
authors.lastname: Bindl
authors.forename: W H
authors.initials: WH
authors.lastname: Mörmann
mesh_terms: D000537:Aluminum Oxide; D001641:Bicuspid; D017076:Computer-Aided Design; D003442:Crowns; D001840:Dental Bonding; D003776:Dental Porcelain; D017267:Dental Prosthesis Design; D017268:Dental Prosthesis Retention; D019232:Dental Restoration Failure; D005260:Female; D006801:Humans; D008297:Male; D008963:Molar; D019279:Resin Cements; D019553:Tooth, Nonvital
chemical_list: D019279:Resin Cements; C082340:Vita Mark II; D003776:Dental Porcelain; C070870:In-Ceram; D000537:Aluminum Oxide