title: [MBT straight wire for Class II division I malocclusion cases].
abstract: OBJECTIVE
  To evaluate the therapeutic effects of MBT straight wire on extraction case of Class II division I.
  
  
  METHODS
  Thirty-six class II division I malocclusion patients were treated with MBT straight wire by extracting 4 bicuspid premolars or 2 maxillary bicuspid premolars. The X-ray cephalograms were analyzed before and after the treatment of MBT straight wire.
  
  
  RESULTS
  After the treatment, the overjet was reduced by 6.04 mm (P < 0.01); U1-NA was reduced by 15.43 degrees (P <0.01); and U1-NA (mm) was reduced by 4.71 mm (P <0.01). ANB was significantly reduced (P < 0.05).
  
  
  CONCLUSIONS
  MBT straight wire not only shortens the operation but also shows superior effect for Class II division I malocclusion cases.
authors.affiliation: Department of Stomatology, Xiangya Hospital, Central South University, Changsha, China. lyh8484123@126.com
authors.forename: Yong-hua
authors.initials: YH
authors.lastname: Lei
authors.forename: Xin-chun
authors.initials: XC
authors.lastname: Jian
authors.forename: Yan-qin
authors.initials: YQ
authors.lastname: Lu
mesh_terms: D000293:Adolescent; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008312:Malocclusion, Angle Class II / Q000628:therapy*; D016382:Orthodontic Appliance Design; D009969:Orthodontic Wires; D009971:Orthodontics, Corrective / Q000295:instrumentation* / Q000379:methods