title: [One year observation of craniomandibular structure changes of skeletal Class II patients in early permanent dentition].
abstract: OBJECTIVE
  To study the craniomandibular growth of skeletal class II patients in early permanent dentition so that demonstrate malocclusion development and decide orthodontic treatment opportunity.
  
  
  METHODS
  Forty skeletal class II patients in early permanent dentition were selected at random and observed for one year. The lateral cephalometric X-ray films were taken before and after observation for every patient, then Downs analysis and doublet test were made.
  
  
  RESULTS
  Female patients' jaws relation didn't change in early permanent dentition, but upper incisors were more protrusive than before, and lower incisors inclined lingualy. Male patients' mandible grew upward and forward, but the absolute value of small change.
  
  
  CONCLUSIONS
  It is necessary to treat skeletal class II deformities early.
authors.affiliation: College of Stomatology, Fourth Military Medical University, Xi'an 710032.
authors.forename: S
authors.initials: S
authors.lastname: Yao
authors.forename: T
authors.initials: T
authors.lastname: Kazuto
authors.forename: H
authors.initials: H
authors.lastname: Kooji
mesh_terms: D000293:Adolescent; D002648:Child; D019229:Dentition, Permanent; D005260:Female; D006801:Humans; D008297:Male; D008312:Malocclusion, Angle Class II / Q000209:etiology / Q000473:pathology* / Q000628:therapy; D008334:Mandible / Q000254:growth & development*