title: The effect of surface treatments on the bond strength of a nonprecious alloy-ceramic interface.
abstract: OBJECTIVE
  The purpose of this study was to compare the effect of seven different alloy surface treatments on the bond strength of the porcelain-metal interface.
  
  
  METHODS
  Three layers of opaque porcelain and a measured thickness of dentin porcelain were applied to nickel-chromium alloy. A tensile bond strength test was used.
  
  
  RESULTS
  The alloy surface treatment that exhibited the highest bond strength was sandblast + surface grinding + sandblast + de-gas, whereas the alloy surface treatment that exhibited the lowest bond strength was sandblast + surface grinding + sandblast + steam cleaning + de-gas. There was a significant difference between the two methods (P < 0.05).
  
  
  CONCLUSIONS
  It was concluded that de-gassing the alloy prior to porcelain application increased the bond strength and excess surface grinding of the alloy reduced bond strength; steam cleaning the alloy surface prior to de-gassing and porcelain application also significantly reduced the bond strength.
authors.affiliation: Department of Restorative Dentistry, School of Clinical Dentistry, University of Sheffield, England.
authors.forename: J D
authors.initials: JD
authors.lastname: Graham
authors.forename: A
authors.initials: A
authors.lastname: Johnson
authors.forename: D G
authors.initials: DG
authors.lastname: Wildgoose
authors.forename: M Y
authors.initials: MY
authors.lastname: Shareef
authors.forename: G
authors.initials: G
authors.lastname: Cannavina
mesh_terms: D000704:Analysis of Variance; D003775:Dental Polishing / Q000379:methods*; D008422:Materials Testing; D016876:Metal Ceramic Alloys / Q000737:chemistry*; D018709:Statistics, Nonparametric; D013499:Surface Properties; D013718:Tensile Strength
chemical_list: D016876:Metal Ceramic Alloys