title: Evaluating porcelain color match of different porcelain shade-matching systems.
abstract: OBJECTIVE
  This in vitro study was designed to evaluate the new ShadeEye-EX Chroma Meter and a new visual porcelain shade-matching system (Vitapan 3-D Master, Omega 900) in comparison to the traditionally used visual porcelain shade-matching system (Vita Lumin Vacuum, VMK 68).
  
  
  METHODS
  Shade matches and porcelain fabrications on individualized shade tabs were carried out. The fabricated porcelain tabs were evaluated against the respective natural tooth using the United States Public Health Service (USPHS) criteria to determine clinically acceptable match. The tabs also were ranked according to the final-color match to the corresponding natural tooth.
  
  
  RESULTS
  The percentage of clinically acceptable color matches were as follows: Vita Lumin Vacuum (46.67%), ShadeEye-EX (40%), and Vitapan 3-D Master (56.67%). The generalized estimating equation (alpha = 0.5) showed no statistically significant difference between systems in obtaining a clinically acceptable match (p = .5729). The chi-squared test (alpha = 0.5) showed no statistically significant difference between systems in terms of rank order (p = .5017). The two new systems do not produce color match that is better than the conventional visual porcelain shade-matching system.
authors.affiliation: Section of Restorative Dentistry, Prosthodontics and Endodontics, Ohio State University, Columbus, Ohio, USA. Wee.12@osu.edu
authors.forename: A G
authors.initials: AG
authors.lastname: Wee
authors.forename: E Y
authors.initials: EY
authors.lastname: Kang
authors.forename: W M
authors.initials: WM
authors.lastname: Johnston
authors.forename: R R
authors.initials: RR
authors.lastname: Seghi
mesh_terms: D016009:Chi-Square Distribution; D003116:Color / Q000592:standards*; D003776:Dental Porcelain; D006801:Humans; D017797:Prosthesis Coloring; D018709:Statistics, Nonparametric
chemical_list: D003776:Dental Porcelain