title: [Effect of preparation methods on the metal-porcelain bond strength of Co-Cr alloys].
abstract: OBJECTIVE
  To compare the shear bond strength(SBS) of cast Co-Cr alloys and selective laser melting(SLM) Co-Cr alloys with those of dental porcelain.
  
  
  METHODS
  A dental porcelain (Vita) was applied on cast and SLM Co-Cr alloy specimens (n = 10). SBS test was conducted, and fracture mode analysis was determined. Student's t-test by SPSS 13.0 software was employed to analyze the data.
  
  
  RESULTS
  The SLM Co-Cr alloy specimens had lower SBS values than the cast Co-Cr alloy specimens (P > 0.05). The metal-porcelain bond strength value of the cast group was (33.11 +/- 4.98) MPa, and that of the SLM group was (30.94 +/- 5.98) MPa. The specimens in both test groups exhibited mixed failure.
  
  
  CONCLUSIONS
  The metal-porcelain system processed by SLM exhibit a bond strength that is similar to that of the cast group. This system also display a high precision.
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
authors.forename: Shuai
authors.initials: S
authors.lastname: Chi
authors.forename: Jin
authors.initials: J
authors.lastname: Xu
authors.forename: Yanyan
authors.initials: Y
authors.lastname: Wang
authors.forename: Desong
authors.initials: D
authors.lastname: Zhan
mesh_terms: D000497:Alloys; D002858:Chromium Alloys; D003722:Dental Alloys; D003776:Dental Porcelain; D007834:Lasers; D008422:Materials Testing; D016876:Metal Ceramic Alloys; D008670:Metals
chemical_list: D000497:Alloys; D002858:Chromium Alloys; D003722:Dental Alloys; D016876:Metal Ceramic Alloys; D008670:Metals; D003776:Dental Porcelain