title: Immediate shear bond strengths of a composite, a compomer and a glass ionomer to a ceramic substrate.
abstract: OBJECTIVE
  To determine the best-performing combination of three core buildup materials and three bonding materials based on their bond strength to ceramic blocks in vitro.
  
  
  METHODS
  The materials used for core buildup were a composite (Tetric EvoCeram), a compomer (Compoglass F), and a glass-ionomer cement (Ketac Fil Plus), and for bonding, a three-step etch-and-rinse adhesive (Syntac), a two-step etch-and-rinse adhesive (ExciTE), and a single-step system (RelyX Unicem). Bond strength to ceramic blocks was determined by shear bond strength testing. Fracture behavior was evaluated by scanning electron microscopy.
  
  
  RESULTS
  The highest adhesive values between buildup and ceramic were obtained using the materials Compoglass F and Syntac, followed by Compoglass F and ExciTE. Among the two other core buildups, Tetric EvoCeram performed better than Ketac Fil Plus, which was independent of the bonding materials. Adhesive fractures were characteristically observed with Syntac and ExciTE, and cohesive fractures were characteristically observed with RelyX Unicem.
  
  
  CONCLUSIONS
  These data show that compomers bonded with a multistep adhesive system achieved statistically significantly higher shear bond strength than composites and glass-ionomer cements. Within the limitations inherent to this in vitro study, the use of compomers for core buildup can be recommended.
authors.affiliation: Medical University of Vienna, Vienna, Austria.
authors.forename: Barbara
authors.initials: B
authors.lastname: Cvikl
authors.forename: Rene
authors.initials: R
authors.lastname: Filipowitsch
authors.forename: Jörg
authors.initials: J
authors.lastname: Wernisch
authors.forename: Modesto
authors.initials: M
authors.lastname: Raabe
authors.forename: Reinhard
authors.initials: R
authors.lastname: Gruber
authors.forename: Andreas
authors.initials: A
authors.lastname: Moritz
mesh_terms: D020770:Compomers; D003188:Composite Resins; D003442:Crowns; D001840:Dental Bonding; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D008298:Maleates; D008689:Methacrylates; D019279:Resin Cements; D033081:Shear Strength
chemical_list: D020770:Compomers; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C420130:Excite cement; D005899:Glass Ionomer Cements; D008298:Maleates; D008689:Methacrylates; C483701:Rely X Unicem; D019279:Resin Cements; C078484:Syntac dentine adhesive; C501891:Tetric EvoCeram; C476992:compoglass flow; D003776:Dental Porcelain; C103502:Variolink; C040964:Ketac-Fil