title: The effect of background and ceramic thickness on the color of an all-ceramic restorative system.
abstract: OBJECTIVE
  Evaluation of the color change of a semileucent ceramic system with different core-veneer thicknesses and backgrounds.
  
  
  METHODS
  Thirty disk-shaped specimens with different thicknesses of core-veneer were prepared with IPS-Empress 2 and IPS-Eris glass ceramic and four backgrounds were prepared.
  
  
  RESULTS
  Color differences were significantly influenced by total ceramic thicknesses and backgrounds (p < 0.001).
  
  
  CONCLUSIONS
  Thickness and backgrounds caused a detectable color mismatch in clinically relevant core-veneer thicknesses of IPS Empress 2.
authors.affiliation: Department of Prosthodontics, Dental School, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Hamid
authors.initials: H
authors.lastname: Jalali
authors.forename: Esmail S
authors.initials: ES
authors.lastname: Alizadeh
authors.forename: Leyla
authors.initials: L
authors.lastname: Sadighpour
authors.forename: Ghasem Ommati
authors.initials: GO
authors.lastname: Shabestari
authors.forename: Mohamad J Kharazi
authors.initials: MJ
authors.lastname: Fard
mesh_terms: D002516:Ceramics / Q000737:chemistry; D003116:Color; D003188:Composite Resins / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry; D003775:Dental Polishing / Q000379:methods; D003776:Dental Porcelain / Q000737:chemistry*; D006047:Gold Alloys / Q000737:chemistry; D006801:Humans; D018020:Lithium Compounds / Q000737:chemistry; D008422:Materials Testing; D010165:Palladium / Q000737:chemistry; D011176:Post and Core Technique / Q000295:instrumentation; D017797:Prosthesis Coloring; D012834:Silver / Q000737:chemistry; D013053:Spectrophotometry; D013499:Surface Properties
chemical_list: D003188:Composite Resins; D003764:Dental Materials; C118557:Empress 2; C500744:Eris ceramic; D006047:Gold Alloys; D018020:Lithium Compounds; D003776:Dental Porcelain; D012834:Silver; D010165:Palladium; C023506:Glass ceramics