title: Applicability of Bolton tooth-size ratios in racial groups.
abstract: OBJECTIVE
  To determine whether there is sexual dimorphism regarding Bolton ratios within four ethnic groups and to compare them against Bolton standards.
  
  
  METHODS
  The sample consisted of 140 dental study casts of untreated normal occlusion subjects, derived from four racial groups: black, white, Afro-Mediterranean, and Japanese. Anterior and overall Bolton ratios were calculated for each cast. The Kolmogorov-Smirnov test, t test, and one-way ANOVA were used.
  
  
  RESULTS
  No statistically significant sexual dimorphism in anterior or total tooth-size ratios were found within any group. Only the Japanese anterior ratio (75.09) was statistically less than the Bolton standard (77.2; P<.001).
  
  
  CONCLUSIONS
  The Bolton ratio can be applied to the investigated ethnic groups except for the anterior ratio in Japanese patients.
authors.affiliation: Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, Brazil.
authors.forename: Thais Maria Freire
authors.initials: TM
authors.lastname: Fernandes
authors.forename: Guilherme
authors.initials: G
authors.lastname: Janson
authors.forename: Arnaldo
authors.initials: A
authors.lastname: Pinzan
authors.forename: Renata
authors.initials: R
authors.lastname: Sathler
authors.forename: Lívia Maria Andrade
authors.initials: LM
authors.lastname: de Freitas
authors.forename: Marcos Roberto
authors.initials: MR
authors.lastname: de Freitas
mesh_terms: D000293:Adolescent; D044466:Asian People; D001641:Bicuspid / Q000033:anatomy & histology; D044383:Black People; D003481:Cuspid / Q000033:anatomy & histology; D005006:Ethnicity; D005260:Female; D006801:Humans; D007180:Incisor / Q000033:anatomy & histology; D008297:Male; D008334:Mandible; D008437:Maxilla; D008963:Molar / Q000033:anatomy & histology; D009811:Odontometry / Q000706:statistics & numerical data*; D044469:Racial Groups; D012727:Sex Characteristics; D012737:Sex Factors; D014070:Tooth / Q000033:anatomy & histology*; D044465:White People