title: Effect of adding opaque porcelain on the final color of porcelain laminates.
abstract: BACKGROUND
  Increasing the opacity of porcelain laminates is one of the techniques most commonly used to mask the color of darkly stained teeth.
  
  
  OBJECTIVE
  Two different brands of porcelain (Fortune and Optec) disks that contained various amounts of modifying porcelains to alter opacity were cemented with untinted resin cement to a dark colored substrate.
  
  
  METHODS
  The color of the substrate was measured before and after cementation and the change in color was calculated.
  
  
  RESULTS
  Fortune porcelain showed a progressive increase in the amount of change produced as the modifying porcelain was increased, whereas Optec porcelain showed a decrease in the amount of change as modifying porcelain was increased.
  
  
  CONCLUSIONS
  A progressive increase of yellow was exhibited in the samples as the amount of opacity is increased.
authors.affiliation: Department of Cardiology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, USA.
authors.forename: P
authors.initials: P
authors.lastname: Yaman
authors.forename: S R
authors.initials: SR
authors.lastname: Qazi
authors.forename: J B
authors.initials: JB
authors.lastname: Dennison
authors.forename: M E
authors.initials: ME
authors.lastname: Razzoog
mesh_terms: D000704:Analysis of Variance; D002484:Cementation; D003776:Dental Porcelain / Q000737:chemistry*; D003801:Dental Veneers; D008027:Light; D008422:Materials Testing; D017797:Prosthesis Coloring / Q000379:methods*
chemical_list: D003776:Dental Porcelain