title: [Influence of repeated sintering on the color of two brands of porcelain-fused-to-titanium].
abstract: OBJECTIVE
  To investigate the influence of repeated sintering on the color of two porcelain-fused-to-titanium, and the differences between the two porcelains.
  
  
  METHODS
  Thirty samples were prepared and sintered for 9 times. The color of samples were measured following sintering 1, 3, 5, 7, 9 times by ShadeEye NCC colorimeter according to two brands of porcelains with CIE1976L*a*b* color system, and calculated relevant chrome, chromatism and hue, and statistical analysis.
  
  
  RESULTS
  When two brands of porcelains were sintered 5 times, the color parameters had no significant change and sintered continuely, the color parameters of L* and a* had obvious changes, but can't be observed by eyes.
  
  
  CONCLUSIONS
  The color parameters of titanium-porcelains have no significant change after repeated sintering.
authors: Dept. of Prosthodontics, The Affiliated Stomatological Hospital of Nanjing University, Nanjing 210008, China.
authors: Cheng-jun
authors: CJ
authors: Shu
authors: Xiao-ping
authors: XP
authors: Luo
authors: Lie
authors: L
authors: Wu
mesh_terms: D003116:Color; D003124:Colorimetry; D003776:Dental Porcelain; D006801:Humans; D016876:Metal Ceramic Alloys; D014025:Titanium
chemical_list: D016876:Metal Ceramic Alloys; D003776:Dental Porcelain; D014025:Titanium