title: [The study of malocclusion of treatment priority index in Xi'an adolescent].
abstract: OBJECTIVE
  To evaluate the prevalence of malocclusion and orthodontic treatment priority in adolescent.
  
  
  METHODS
  591 boys and 567 girls (aged 12 years old) were studied with their study models and the treatment priority index (TPI) were obtained.
  
  
  RESULTS
  7.03% adolescent had orthodontic treatments (TPI 1:21.33%, TPI 2:47.06%, TPI 3-TPI 5:31.61%).
  
  
  CONCLUSIONS
  TPI is a valid tool to evaluate malocclusion and orthodontic treatment priority. It's very important to establish a regular examination system need for orthodontic treatment in school.
authors.affiliation: Stomatological Hospital of Xi'an Jiaotong University, Xi'an 710004, China.
authors.forename: Xiaorong
authors.initials: X
authors.lastname: Wang
authors.forename: Xiangyu
authors.initials: X
authors.lastname: Ye
authors.forename: Baipin
authors.initials: B
authors.lastname: Niu
mesh_terms: D000293:Adolescent; D002648:Child; D002681:China / Q000453:epidemiology; D003753:Dental Health Surveys; D005260:Female; D006301:Health Services Needs and Demand / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000453:epidemiology* / Q000628:therapy; D015588:Observer Variation; D009971:Orthodontics, Corrective / Q000706:statistics & numerical data*; D015995:Prevalence; D012720:Severity of Illness Index