title: [Treatment of growing Class II division 1 patients with varying degrees of anteroposterior and vertical dysplasias].
abstract: OBJECTIVE
  To evaluate the difference of treatment on growing patients with Class II division 1 using various anteroposterior and vertical skeletal dysplasias.
  
  
  METHODS
  Twenty-eight moderate to severe Class II division 1 malocclusion patients with Class I molar and canineocclusion after treatment were selected. The subjects were divided into 3 groups based on the initial ANB and FMA angles. Pre-treatment and post-treatment cephalograms were evaluated for soft and hard tissues changes after treatment. The data was analyzed using SPSS 12.0 software package.
  
  
  RESULTS
  ANB angle decreased in all three groups. Changes of ANB angle in group 2 and group 3 were greater than group 1(P<0.01). SNA angle decreased significantly in group 3(P<0.01). SNB angle increased significantly in group 1(P<0.01) and group 2(P<0.05). All groups had great maxillary incisors retraction and similar changes in mandibular incisor positions.Soft tissue index showed no significant difference among three groups before and after treatment(P>0.05). But nasolabial angle(P<0.05), soft tissue convexity(P<0.05) and Z angle(P<0.01) changed significantly in group 3.
  
  
  CONCLUSIONS
  Conventional orthodontic therapy successfully corrects Class II division 1 malocclusions in growing patients with the improvement of soft and hard tissues.The patients who initially have the most severe skeletal dysplasias can have the greatest changes in profile.
authors.affiliation: Department of Orthodontics, Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai Key Laboratory of Stomatology. Shanghai 200011,China. yymsherrya@hotmail.com
authors.forename: Yi-ming
authors.initials: YM
authors.lastname: Yang
authors.forename: Lin-ling
authors.initials: LL
authors.lastname: Chen
authors.forename: Qian
authors.initials: Q
authors.lastname: Liao
mesh_terms: D002508:Cephalometry; D006801:Humans; D007180:Incisor; D008310:Malocclusion; D008312:Malocclusion, Angle Class II; D008334:Mandible; D008963:Molar; D009971:Orthodontics, Corrective