title: Remakes of Colorlogic and IPS Empress ceramic restorations in general practice.
abstract: OBJECTIVE
  The aim of this article was to study frequencies and distribution of remakes of all-ceramic inlays/onlays, veneers, and crowns occurring before and after cementation.
  
  
  METHODS
  A total of 2,069 sintered feldspathic ceramic restorations (Colorlogic) and 1,136 pressure-molded ceramic restorations (IPS Empress 1 and 2) were produced during the study period by one dental laboratory. The laboratory gave an unqualified and unlimited guarantee for their ceramic restorations. The outcome variable was reports from the clinicians to the dental laboratory about any problems related to the restoration, necessitating remake.
  
  
  RESULTS
  Problems occurring before cementation occurred in 4.4% of the restorations. Veneers were remade more frequently than the other types of restorations (6.6%). After cementation, the overall 2-year rate of remakes was 1%, indicating a survival rate of the ceramic restorations of 99%, with inlays/onlays exhibiting the highest (99.8%) and crowns the lowest (98.4%) rates. This difference in rates was significant. No significant differences in remakes between ceramics or tooth categories were found.
  
  
  CONCLUSIONS
  There were few problems in a short- to medium-term perspective that, in the opinion of general practitioners, necessitated remakes of all-ceramic restorations.
authors.affiliation: helge.hekland@c2i.net
authors.forename: Helge
authors.initials: H
authors.lastname: Hekland
authors.forename: Trond
authors.initials: T
authors.lastname: Riise
authors.forename: Einar
authors.initials: E
authors.lastname: Berg
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry*; D002484:Cementation; D002516:Ceramics / Q000737:chemistry*; D003442:Crowns; D003776:Dental Porcelain / Q000737:chemistry*; D017267:Dental Prosthesis Design; D017269:Dental Prosthesis Repair; D019232:Dental Restoration Failure; D003801:Dental Veneers; D005792:General Practice, Dental; D006801:Humans; D007284:Inlays; D007754:Laboratories, Dental; D018020:Lithium Compounds / Q000737:chemistry; D017680:Potassium Compounds / Q000737:chemistry; D016016:Proportional Hazards Models; D016019:Survival Analysis
chemical_list: D000538:Aluminum Silicates; C085005:Colorlogic porcelain; C118557:Empress 2; C075815:IPS-Empress ceramic; D018020:Lithium Compounds; D017680:Potassium Compounds; D003776:Dental Porcelain; C016447:feldspar