title: Shade-Matching Performance Using a New Light-Correcting Device.
abstract: OBJECTIVE
  To evaluate the shade-matching performance of dental students when using a new light-correcting device with polarization filter.
  
  
  METHODS
  A total of 21 observers assessed the shade of the upper frontal teeth in one patient under three lighting conditions: daylight (A), daylight and a light-correcting device (Smile Lite, Switzerland) (B), daylight and a light-correcting device with a polarization filter attached (C) by using two shade guides: VITA Classical and 3D Master. Matching scores were calculated as a sum of the color differences between the reference shades and the selected shades (ΔEab *). Data were analyzed using analysis of variance (ANOVA) test (α = 0.05).
  
  
  RESULTS
  A significant difference was found between the shade-matching scores under the three lighting conditions (p < 0.001). However, pairwise comparisons showed that between A (ΔEab *A = 1,873.6) and C (ΔEab *C = 2,019.1), there was no significant difference (p > 0.05). The best matching scores were calculated for B (ΔEab *B = 1,652.5). Significant differences were found in respect to the observer's gender (p < 0.05) and color competency (p < 0.05), as well as with the shade guide used (p < 0.05).
  
  
  CONCLUSIONS
  Dental students' shade-matching ability was better when the light-correcting device was used, but the addition of the filter to it did not prove beneficial. The shade guides used, the observer's gender, and color competency influenced the shade matching.
  
  
  CONCLUSIONS
  The light-correcting device influenced the shade-matching performance; however, the attached polarization filter did not improve the results of the shade matching.
authors.affiliation: Department of Prosthetic Dentistry and Dental Materials, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania.
authors.forename: Cristina
authors.initials: C
authors.lastname: Gasparik
authors.affiliation: Department of Prosthetic Dentistry and Dental Materials, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania.
authors.forename: Alexandru Graţian
authors.initials: AG
authors.lastname: Grecu
authors.affiliation: Department of Prosthetic Dentistry and Dental Materials, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania.
authors.forename: Bogdan
authors.initials: B
authors.lastname: Culic
authors.affiliation: Department of Conservative Dentistry, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania.
authors.forename: Mîndra Eugenia
authors.initials: ME
authors.lastname: Badea
authors.affiliation: Department of Prosthetic Dentistry and Dental Materials, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania.
authors.forename: Diana
authors.identifier: http://orcid.org/0000-0002-9080-9625
authors.initials: D
authors.lastname: Dudea
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D005260:Female; D006801:Humans; D008027:Light; D008297:Male; D017797:Prosthesis Coloring; D013335:Students, Dental; D014070:Tooth; D055815:Young Adult