title: [A longitudinal study of 5 cephalometric plane angles in female children from 7 to 12 years old].
abstract: OBJECTIVE
  The aim of this study was to find the laws of angular changes of 5 cephalometric planes in children with mixed dentitions.
  
  
  METHODS
  Nineteen female children were annually examined with X-ray, and the cephalometric analysis was performed in continuous 4 years. Of these children, 10 children were investigated from the age of 7 years old, and the other 9 children from 9 years old. The two groups were longitudinally studied. All of the children were observed almost at the same age (9-10 years old) in the two groups, and the results were analyzed with mixed longitudinal methods. All data were analyzed with SPSS 8.0 software.
  
  
  RESULTS
  In the observation period, the angular relationship of FH to BaN remain constant among 5 cephalometric planes, and FH to SN was almost in the same situation.
  
  
  CONCLUSIONS
  In mixed dentition, the angular relationship of FH, BaN and SN barely change.
authors.affiliation: School of Stomatology, Peking University.
authors.forename: Jing
authors.initials: J
authors.lastname: Peng
authors.forename: Hui
authors.initials: H
authors.lastname: Deng
authors.forename: Caifang
authors.initials: C
authors.lastname: Cao
mesh_terms: D002508:Cephalometry; D002648:Child; D003766:Dental Occlusion; D003818:Dentition, Mixed; D005145:Face / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008445:Maxillofacial Development; D011859:Radiography; D012016:Reference Values; D012886:Skull / Q000033:anatomy & histology / Q000000981:diagnostic imaging*