title: Clinical evaluation of all-ceramic onlays: a 4-year retrospective study.
abstract: OBJECTIVE
  The aim of the present study was to evaluate the clinical outcome of extensive Empress onlays retained with resin-bonded cement.
  
  
  METHODS
  One hundred thirty extensive ceramic onlays were placed in premolar and molar regions in 91 patients treated by 2 general practitioners between 1997 and 2000. Seventy-seven percent of the constructions were luted with chemically cured resin composite cement and 23% were luted with dual-cured resin cement. Fifty-nine patients with 81 restorations were clinically evaluated independently by 2 calibrated examiners using the California Dental Association protocol. The mean time in function for all restorations at examination was 49 months.
  
  
  RESULTS
  Seventy-five (93%) onlays were still in function after 4 years. Six onlays (7.3%) failed; 1 had lost retention as a result of caries, and 5 had fractured. All failures were in molar regions.
  
  
  CONCLUSIONS
  Ceramic onlay therapy is an acceptable treatment alternative over a 4-year period, but further long-term data are necessary before this treatment should be considered for general dental practice.
authors: Victoriakliniken Dental Care, Saltsjöbaden, Sweden. dentalcare@victoriakliniken.com
authors: Katarina
authors: K
authors: Naeselius
authors: Carl-Fredrik
authors: CF
authors: Arnelund
authors: Margareta K
authors: MK
authors: Molin
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry; D001641:Bicuspid; D001896:Boron Compounds / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003731:Dental Caries / Q000145:classification; D003776:Dental Porcelain / Q000737:chemistry; D017268:Dental Prosthesis Retention; D019232:Dental Restoration Failure; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005260:Female; D006801:Humans; D007284:Inlays; D008297:Male; D008689:Methacrylates / Q000737:chemistry; D008768:Methylmethacrylates / Q000737:chemistry; D008875:Middle Aged; D008963:Molar; D019279:Resin Cements / Q000737:chemistry; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D000538:Aluminum Silicates; C409386:Bisco Glaze; D001896:Boron Compounds; C086628:Choice resin cement; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C075815:IPS-Empress ceramic; D008689:Methacrylates; D008768:Methylmethacrylates; D019279:Resin Cements; D003776:Dental Porcelain; C100742:All-Bond 2; C041330:Scotchbond; C049495:Super-bond