title: [Clinical evaluation of zirconia crowns for single posterior teeth].
abstract: OBJECTIVE
  To observe and evaluate the clinical performance of zirconia crowns made by CEREC inLab computer aided design/computer aided manufacturing(CAD/CAM) for posterior teeth.
  
  
  METHODS
  A total of 242 patients were implanted with zirconia crowns fabricated by CEREC inLab CAD/CAM. The crowns were evaluated by Modified US Public Health Service criteria at baseline, 6, 12, 24, and 36 months. The chi-square test was used to analyze the survival rate.
  
  
  RESULTS
  All but five crowns were evaluated by an independent evaluator at baseline, 6, 12, 24, and 36 months. The survival rate declined with time. The A score percentage was above 85% at 36 months.
  
  
  CONCLUSIONS
  The single zirconia crowns fabricated by CEREC inLab CAD/CAM demonstrate satisfactory clinical performance during a short period.
authors.forename: Yuanhua
authors.initials: Y
authors.lastname: Chen
authors.forename: Xiangfeng
authors.initials: X
authors.lastname: Meng
authors.forename: Qing
authors.initials: Q
authors.lastname: Yu
mesh_terms: D002516:Ceramics; D017076:Computer-Aided Design; D003442:Crowns; D003776:Dental Porcelain; D017267:Dental Prosthesis Design; D015040:Zirconium
chemical_list: D003776:Dental Porcelain; C074543:Cerec; D015040:Zirconium; C028541:zirconium oxide