title: Clinical evaluation of 209 all-ceramic single crowns cemented on natural and implant-supported abutments with different luting agents: a 6-year retrospective study.
abstract: BACKGROUND
  The Procera AllCeram™ system (Nobel Biocare AB, Göteborg, Sweden) is a valid alternative to metal-ceramic restorations. However, limited long-term data of its use for single crowns on natural and implant-supported abutments are available.
  
  
  OBJECTIVE
  The present study aimed at evaluating the clinical performances of Procera AllCeram single crowns in both anterior and posterior regions of the oral cavity either on natural tooth or implant abutments over a period of 6 years.
  
  
  METHODS
  Two hundred nine single crowns were fabricated and used in 112 patients. Zinc phosphate and resin luting agents were used to cement the restorations. The crowns were evaluated according to the California Dental Association's quality assessment system.
  
  
  RESULTS
  Three crowns were lost at follow-up. Of the 206 restorations, which completed the 6-year follow-up, 9 crowns were affected by mechanical complications and 7 crowns failed. All surviving crowns were ranked as either excellent or acceptable. Cumulative survival and success rates of 95.2 and 90.9%, respectively, were recorded.
  
  
  CONCLUSIONS
  Within the limitations of the present study, Procera AllCeram crowns proved to be a reliable clinical option to restore both anterior and posterior missing teeth either on natural or implant abutments. The resin cement used in the present study performed better than the zinc phosphate luting agent.
authors.affiliation: University Federico II of Naples, Italy. errestino@libero.it
authors.forename: Roberto
authors.initials: R
authors.lastname: Sorrentino
authors.forename: Luigi
authors.initials: L
authors.lastname: Galasso
authors.forename: Stefano
authors.initials: S
authors.lastname: Tetè
authors.forename: Giorgio
authors.initials: G
authors.lastname: De Simone
authors.forename: Fernando
authors.initials: F
authors.lastname: Zarone
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000537:Aluminum Oxide / Q000737:chemistry; D002484:Cementation / Q000379:methods*; D003188:Composite Resins / Q000737:chemistry; D003442:Crowns; D000044:Dental Abutments; D003738:Dental Cements / Q000737:chemistry*; D015921:Dental Implants; D018772:Dental Marginal Adaptation; D003774:Dental Plaque Index; D003776:Dental Porcelain / Q000737:chemistry*; D017267:Dental Prosthesis Design; D017268:Dental Prosthesis Retention; D019232:Dental Restoration Failure; D005260:Female; D005500:Follow-Up Studies; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D008297:Male; D008875:Middle Aged; D010512:Periodontal Index; D019279:Resin Cements / Q000737:chemistry; D012189:Retrospective Studies; D013314:Stress, Mechanical; D016896:Treatment Outcome; D055815:Young Adult; D015036:Zinc Phosphate Cement / Q000737:chemistry
chemical_list: C105314:AllCeram; D003188:Composite Resins; D003738:Dental Cements; D015921:Dental Implants; D005899:Glass Ionomer Cements; D019279:Resin Cements; C084550:Vitremer; D003776:Dental Porcelain; C078770:De Trey's Zinc Cement; D015036:Zinc Phosphate Cement; D000537:Aluminum Oxide