title: Five-year evaluation of two resin-retained ceramic systems: a retrospective study in a general practice setting.
abstract: OBJECTIVE
  This study performed a clinical evaluation of two ceramic systems retained with resin-bonded cement, observed clinical outcomes over time, and compared the two systems used (IPS Empress and Vitadur Alpha) and differences between inlays and onlays.
  
  
  METHODS
  Three general practitioners placed 317 restorations (215 IPS Empress and 102 Vitadur Alpha) in 153 patients. The first clinical registration was performed 6 to 36 months after placement of the restorations by calibrated investigators using the CDA criteria. A second follow-up was performed 36 months later. The mean time in function for all restorations at follow-up was 60 months.
  
  
  RESULTS
  At the first examination, five restorations were not clinically acceptable because of fractures and caries. At follow-up, another 16 restorations were judged as failures. The most significant changes over time were an increase in rough surfaces, evidence of increasing marginal discrepancy, and slight mismatch in color between restored tooth and ceramic restoration. When comparing IPS Empress to Vitadur Alpha, there was no difference in clinical performance. When comparing inlay and onlay restorations, there was a tendency toward a higher number of failures in the inlay group. The overall success rate was 92%.
  
  
  CONCLUSIONS
  Ceramic restorations performed well after 5 years in function and provide a good treatment alternative that can be successfully managed in general dental practice.
authors.affiliation: Department of Prosthetic Dentistry, Postgraduate Dental Education Center, Orebro, Sweden. carl-fredrik.arnelund@orebroll.se
authors.forename: Carl-Fredrik
authors.initials: CF
authors.lastname: Arnelund
authors.forename: Anders
authors.initials: A
authors.lastname: Johansson
authors.forename: Maths
authors.initials: M
authors.lastname: Ericson
authors.forename: Per
authors.initials: P
authors.lastname: Häger
authors.forename: Kristina Arvidson
authors.initials: KA
authors.lastname: Fyrberg
mesh_terms: D000179:Acrylates; D000328:Adult; D000368:Aged; D000538:Aluminum Silicates; D003776:Dental Porcelain; D019232:Dental Restoration Failure; D017220:Dentin-Bonding Agents; D005260:Female; D005500:Follow-Up Studies; D005792:General Practice, Dental; D006801:Humans; D007284:Inlays; D008297:Male; D008875:Middle Aged; D019279:Resin Cements; D012189:Retrospective Studies
chemical_list: D000179:Acrylates; D000538:Aluminum Silicates; D017220:Dentin-Bonding Agents; C075815:IPS-Empress ceramic; D019279:Resin Cements; C078484:Syntac dentine adhesive; C483027:vitadur alpha; D003776:Dental Porcelain; C040415:heliobond