title: [Coloration of mica glass ceramic for use in dental CAD/CAM system].
abstract: OBJECTIVE
  An intrinsically colored machinable glass-ceramic containing tetrasilicic fluormica as the predominant crystal phase was studied, which was used in molar crown in dental CAD/CAM system.
  
  
  METHODS
  Orthogonal design analysis was used to select appropriate base formula, coloration and heat treatment process.
  
  
  RESULTS
  Factors influencing the color appearance of mica glass ceramic were nucleation agent and the ratio of Mg(2+) to K(+) in base formula; Cerium oxide (CeO(2)) was used as the main coloration; The preferred heat treatment was 650 degrees C for 1 h and 1,000 degrees C or 1,050 degrees C for 3 h - 4 h.
  
  
  CONCLUSIONS
  This mica glass-ceramic could provide 4 to 5 color appearance for dental use, it showed excellent machinability which was eminently suitable for use in dental CAD/CAM system.
authors.affiliation: Depatment of Prosthodontics, College of Stomatology, Fourth Military Medical University, Xian 710032, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Sun
authors.forename: Zhong-yi
authors.initials: ZY
authors.lastname: Wang
authors.forename: Jie-mo
authors.initials: JM
authors.lastname: Tian
authors.forename: Xiao-gang
authors.initials: XG
authors.lastname: Cao
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry*; D003116:Color; D017076:Computer-Aided Design; D003442:Crowns; D003776:Dental Porcelain / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D008963:Molar
chemical_list: D000538:Aluminum Silicates; D003776:Dental Porcelain; C011934:mica