title: [One phase or two-phase orthodontic treatment: comparisons].
abstract: BACKGROUND
  The optimal timing for starting an orthodontic treatment is           discussed by many authors. This is even more difficult that there are different           therapeutic approaches. In case of Class II, division 1 malocclusion, one approach           consists of realising an early treatment during mixed dentition, then a surveillance phase           and finally an alignment phase during adolescent dentition. The other approach consists of           waiting for adolescent dentition to treat.
  
  
  METHODS
  We made a           study with 65 subjects with Class II, division 1 malocclusion: 33 were treated in one           phase during adolescent dentition and 32 were treated in two phases, beginning in mixed           dentition. In both groups the patients had the same age at the beginning of treatment and           were treated with Distal Active Concept.
  
  
  RESULTS
  Correction of offset bases           bone, increase of the diagonal mandibular and over-jet stability are significantly better           in the group treated in two phases. We guess that the functions estimated progressively           more and more surely in this new environment.
authors.forename: Aude
authors.initials: A
authors.lastname: Bailleau
authors.forename: Jean-Jacques
authors.initials: JJ
authors.lastname: Aknin
authors.forename: Sarah
authors.initials: S
authors.lastname: Gebeile-Chauty
mesh_terms: D003817:Dentition; D003818:Dentition, Mixed; D006801:Humans; D008310:Malocclusion; D008312:Malocclusion, Angle Class II / Q000628:therapy; D008334:Mandible