title: [Clinical effect of modified forsus appliance to children with mandibular retrusion].
abstract: OBJECTIVE
  To evaluate the effects of modified Forsus appliance in the treatment of Class II mandibular retrusion.
  
  
  METHODS
  18 children with mandibular retrusion were selected and treated with modified Forsus appliance. Cephalometric radiographs were taken and analyzed at pre-treatment and post-treatment. Students' t-test was used to determine if there were significant differences between pre-treatment and post-treatment.
  
  
  RESULTS
  After 6-8 months of therapy, profiles were obviously improved. B moved forward (2.9+/-3.1) mm. ANB decreased (2.5+/-1.2) degrees. The overjet decreased (5.0+2.8) mm. The molar relationship was corrected to Class I from Class II. SN-OL increased (4.3+2.2) degrees. There was significant difference between pre-treatment and post-treatment.
  
  
  CONCLUSIONS
  Combined with straight wire appliance, modified Forsus appliance can effectively stimulate the mandibular growth, balance the jaw relationship, and correct mandibular retrusion.
authors.affiliation: Dept. of Orthodontics, College of Stomatology, Shandong Universi- ty, Jinan 250012, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Ye
authors.forename: Chan-ling
authors.initials: CL
authors.lastname: Wang
authors.forename: Dong-Xu
authors.initials: DX
authors.lastname: Liu
authors.forename: Jie
authors.initials: J
authors.lastname: Guo
authors.forename: Fan
authors.initials: F
authors.lastname: Zhang
mesh_terms: D002508:Cephalometry; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008312:Malocclusion, Angle Class II; D008334:Mandible; D017289:Orthodontic Appliances, Functional; D063173:Retrognathia