title: [Clinical analysis of two-phase treatment of 35 cases with Angle Class II division 1 malocclusion].
abstract: OBJECTIVE
  To evaluate the clinical value of the two-phase treatment of Angle Class II division 1 malocclusion.
  
  
  METHODS
  Thirty five cases with Class II division 1 malocclusion were treated with two-phase treatment(Twin-block functional appliance and fixed appliance).Lateral cephalograms were taken before and after treatment for each patient. The results were analyzed with paired t test using SPSS11.0 software package.
  
  
  RESULTS
  After treatment ,the bite relation of molars ,the overbite and overjet and soft tissue profile were improved. ANB angle,U1-SN,OB,OJ,UL-E,ULP were decreased respectively(P<0.01). SNB, C(o)-G(o),G(o)-G(n),C(o)-G(n) were increased respectively(P<0.01). L1-Mp and FH-MP were increased, too(P<0.05).
  
  
  CONCLUSIONS
  Twin-block functional appliance possesses the orthopedic effects on Angle Class II division 1 malocclusion.It limits the maxillary growth forward and promotes the mandibular growth by repositioning the mandible forward.These may contribute to a harmonious relationship of upper and lower jaws and a better profile.
authors.affiliation: Department of Stomatology, First People's Hospital of Hangzhou, Zhejiang Province, China. txc73@yahoo.com.cn
authors.forename: Xiu-chun
authors.initials: XC
authors.lastname: Tang
authors.forename: Zhen-qi
authors.initials: ZQ
authors.lastname: Chen
authors.forename: Yong-wu
authors.initials: YW
authors.lastname: Wang
authors.forename: Xiang-yu
authors.initials: XY
authors.lastname: Wang
authors.forename: Yao
authors.initials: Y
authors.lastname: Gong
mesh_terms: D002508:Cephalometry; D003766:Dental Occlusion; D006801:Humans; D008310:Malocclusion; D008312:Malocclusion, Angle Class II; D008334:Mandible; D008437:Maxilla; D008963:Molar; D009967:Orthodontic Appliances