title: [Effect of three backgrounds on the final color of Solidex with six different thickness].
abstract: OBJECTIVE
  To analyze the final color of Solidex in six thickness interacting with three different backgrounds.
  
  
  METHODS
  Five specimens of Solidex in each shade A1, A3, and C2 were fabricated at thickness of 1.0, 1.2, 1.4, 1.6, 1.8, and 2.0 mm. The CIE L(*)a(*)b(*) values of specimens were measured using a colorimeter (ShadeEye NCC) to determine the colorimetric difference, when the specimens overlaid on different backgrounds.
  
  
  RESULTS
  When the thickness was more than 1.8 mm, the color difference (DeltaE(*)ab < 1) was not perceived by human observers. When the thickness was 1.4 mm or less than 1.4 mm, the color difference (DeltaE(*)ab > 2.72) was considered clinically unacceptable between alloy background and two types of composite resin background.
  
  
  CONCLUSIONS
  Alloy background had more evident influence on the final color of Solidex than composite resin background. When making metal-free crown restoration using Solidex, it was advisable to make the composite resin more than 1.8 mm thick.
authors.affiliation: Department of Prosthodontics, Dalian Stomatological Hospital, Dalian Liaoning 116021, China.
authors.forename: Wen-zhong
authors.initials: WZ
authors.lastname: Xing
authors.forename: Yi-ning
authors.initials: YN
authors.lastname: Wang
mesh_terms: D002858:Chromium Alloys; D003188:Composite Resins; D003442:Crowns; D017797:Prosthesis Coloring
chemical_list: D002858:Chromium Alloys; D003188:Composite Resins; C113676:Solidex