title: Comparative study of the maturation of permanent teeth in subjects with vertical and horizontal growth patterns.
abstract: BACKGROUND
  The purpose of this research was to compare the maturation stage of permanent teeth in subjects with vertical and horizontal growth patterns.
  
  
  METHODS
  Lateral cephalograms of 256 subjects were reviewed, and subjects were classified according to facial growth pattern. The 30 subjects with the greatest predominance of vertical growth and the 30 with the greatest predominance of horizontal growth were selected; these subjects comprised the vertical and horizontal groups, respectively. Panoramic radiographs of the subjects obtained at 8 years of age were used to evaluate the maturation of the permanent teeth, expressed by the dental age. Comparisons between groups were made with independent t tests.
  
  
  RESULTS
  A statistically significant difference was noted between the dental ages of the vertical and horizontal groups, with the vertical group having a more advanced dental age.
  
  
  CONCLUSIONS
  Subjects with vertical growth patterns should be expected to mature dentally earlier than horizontal growers.
authors.affiliation: Department of Orthodontics, Bauru Dental School, University of Sao Paulo, Brazil. leniananeves@uol.com.br
authors.forename: Leniana Santos
authors.initials: LS
authors.lastname: Neves
authors.forename: Arnaldo
authors.initials: A
authors.lastname: Pinzan
authors.forename: Guilherme
authors.initials: G
authors.lastname: Janson
authors.forename: Conceição Eunice
authors.initials: CE
authors.lastname: Canuto
authors.forename: Marcos Roberto
authors.initials: MR
authors.lastname: de Freitas
authors.forename: Rodrigo Hermont
authors.initials: RH
authors.lastname: Cançado
mesh_terms: D000366:Age Determination by Teeth; D002508:Cephalometry; D002648:Child; D019229:Dentition, Permanent; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008445:Maxillofacial Development; D011862:Radiography, Panoramic; D012189:Retrospective Studies; D018709:Statistics, Nonparametric; D014070:Tooth / Q000254:growth & development*; D014716:Vertical Dimension