title: [Metal-ceramic bond strength of Co-Cr alloy processed by selective laser melting].
abstract: OBJECTIVE
  To evaluate the metal-ceramic bond strength of a selective laser melting Co-Cr alloy.
  
  
  METHODS
  Twelve Co-Cr metal bars were prepared according to the ISO 9693 standard with Vita porcelain fused onto the centre of each bar. Then the sample bars were divided into two groups of six each. The control group was made by traditional cast process (cast group), and the experimental group was processed by selective laser melting (SLM) technology (SLM group). Metal-ceramic bonding strength and fracture mode were assessed using three-point bending test. Fracture mode analysis was determined by scanning electronic microscope/energy dispersive spectroscopy. Student's t-test was used to analyze the data in SPSS 13.0.
  
  
  RESULTS
  The metal-ceramic bond strength value of the cast group was (33.45 ± 2.34) MPa, and that of the SLM group was (31.62 ± 2.34) MPa (t = 0.79, P > 0.05). A mixed fracture mode on the debonding interface of all specimens was observed, while little porcelain was reserved.
  
  
  CONCLUSIONS
  The metal-ceramic system processed by SLM exhibited a bonding strength that satisfies the requirement of clinical application.
authors.affiliation: Department of Prosthodontics, China Medical University, Shenyang, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.forename: Rong
authors.initials: R
authors.lastname: Sun
authors.forename: De-song
authors.initials: DS
authors.lastname: Zhan
authors.forename: Yan-yan
authors.initials: YY
authors.lastname: Wang
mesh_terms: D002858:Chromium Alloys; D019245:Compressive Strength; D003735:Dental Casting Technique; D008422:Materials Testing; D016876:Metal Ceramic Alloys
chemical_list: D002858:Chromium Alloys; D016876:Metal Ceramic Alloys