title: Study of the most frequent natural tooth colors in the Spanish population using spectrophotometry.
abstract: OBJECTIVE
  To identify the most frequent natural tooth colors using the Easyshade Compact (Vita -Zahnfabrik) spectrophotometer on a sample of the Spanish population according to the 3D Master System.
  
  
  METHODS
  The middle third of the facial surface of natural maxillary central incisors was measured with an Easyshade Compact spectrophotometer (Vita Zahnfabrik) in 1361 Caucasian Spanish participants aged between 16 and 89 years. Natural tooth color was recorded using the 3D Master System nomenclature. The program used for the present descriptive statistical analysis of the results was SAS 9.1.3.
  
  
  RESULTS
  The results show that the most frequent dental color in the total sample studied is 3M1 (7.05%), followed by the intermediate shade 1M1.5 (6.91%) and 2L1.5 (6.02%).
  
  
  CONCLUSIONS
  According to the research methodology used, and taking into account the limitations of this study, it can be proposed that the most frequent color among the Spanish population is 3M1; the most common lightness group is 2; the most frequent hue group according to the 3D Master System is M and the most frequent chroma group is 1.5.
authors.affiliation: Departament of Dentistry, School of Medicine, University of Salamanca, Spain.
authors.forename: Cristina
authors.identifier: 0000-0002-7663-5841
authors.initials: C
authors.lastname: Gómez-Polo
authors.affiliation: Departament of Orofacial Prosthesis, Faculty of Dentistry, University Complutense of Madrid, Spain.
authors.forename: Miguel
authors.identifier: 0000-0001-8614-8484
authors.initials: M
authors.lastname: Gómez-Polo
authors.affiliation: Departament of Orofacial Prosthesis, Faculty of Dentistry, University Complutense of Madrid, Spain.
authors.forename: Juan Antonio
authors.identifier: 0000-0002-5440-433X
authors.initials: JA
authors.lastname: Martínez Vázquez de Parga
authors.affiliation: Departament of Orofacial Prosthesis, Faculty of Dentistry, University Complutense of Madrid, Spain.
authors.forename: Alicia
authors.identifier: 0000-0002-6504-2805
authors.initials: A
authors.lastname: Celemín Viñuela
keywords: Age; Color; Gender; Population; Spectrophotometry; Tooth
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