title: [Investigation of malocclusion and orthodontic treatment proportion of middle school students in Hailing district, Taizhou city].
abstract: OBJECTIVE
  To investigate the prevalence of malocclusion and orthodontic treatment proportion of middle school students in Hailing district, Taizhou city.
  
  
  METHODS
  Standard investigation form was made based on the individual normal occlusion and Angle's classification of malocclusion. 9018 middle school students were investigated. SPSS 19.0 software package was used for Chi-square test.
  
  
  RESULTS
  The prevalence of malocclusion was 69.38%. ClassⅠ, ClassII and Class III malocclusions were observed in 52.48%, 30.62% and 16.90% of the sample, respectively. The correction rate was lower than those reported for other cities.
  
  
  CONCLUSIONS
  The findings of the investigation reveal the need to improve public health plans for orthodontic treatment and to increase the rate of correction in Hailing district, Taizhou city.
authors.affiliation: Department of Orthodontics, Stomatological Hospital of Taizhou City. Taizhou 225300, Jiangsu Province, China. E-mail:chenjw11172@163.net.
authors.forename: Wen-yan
authors.initials: WY
authors.lastname: Li
authors.affiliation: Department of Orthodontics, Stomatological Hospital of Taizhou City. Taizhou 225300, Jiangsu Province, China.
authors.forename: Li
authors.initials: L
authors.lastname: Feng
authors.affiliation: Department of Orthodontics, Stomatological Hospital of Taizhou City. Taizhou 225300, Jiangsu Province, China.
authors.forename: Bing
authors.initials: B
authors.lastname: Tang
authors.affiliation: Department of Orthodontics, Stomatological Hospital of Taizhou City. Taizhou 225300, Jiangsu Province, China.
authors.forename: Yi-feng
authors.initials: YF
authors.lastname: Duan
mesh_terms: D002681:China / Q000453:epidemiology; D003729:Dental Care; D006801:Humans; D008310:Malocclusion / Q000453:epidemiology* / Q000628:therapy*; D008313:Malocclusion, Angle Class III / Q000453:epidemiology; D009971:Orthodontics, Corrective / Q000706:statistics & numerical data*; D015995:Prevalence; D013334:Students