title: Surgical prediction of skeletal and soft tissue changes in treatment of Class II.
abstract: BACKGROUND
  The purpose of this study was to study the treatment outcomes and the accuracy of digital prediction and the actual postoperative outcome with Dolphin program on subjects presenting Class II malocclusions.
  
  
  METHODS
  Forty patients underwent surgical mandibular advancement (Group 1) and 40 underwent combined surgery of mandibular advancement and maxillary impaction (Group 2). The available pre surgical (t₁) and a minimum of 12 months post surgical (t₂) cephalometric radiographs were digitized. Predictive cephalograms (t₃) for both groups were traced.
  
  
  RESULTS
  At all times evaluated, Group 1 displayed a shorter mandibular length and Group 2 had a longer lower face. In both groups the surgical interventions (t₂) were greater than initially predicted. There was no significant difference between groups with regards to overjet, overbite and soft tissue measurements.
  
  
  CONCLUSIONS
  In both groups surgeries were more extensive than planned. Facial convexity and the distance of the lips to cranial base presented similar values between t₂ (post surgical) and t₃ (predicted).
authors.affiliation: Department of Orthodontics, Faculty of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil. anadelourdessl@hotmail.com
authors.forename: Ana de Lourdes Sá
authors.initials: Ade L
authors.lastname: de Lira
authors.forename: Walter Leal
authors.initials: WL
authors.lastname: de Moura
authors.forename: Flávia
authors.initials: F
authors.lastname: Artese
authors.forename: Marcos Alan Vieira
authors.initials: MA
authors.lastname: Bittencourt
authors.forename: Lincoln Issamu
authors.initials: LI
authors.lastname: Nojima
mesh_terms: D002508:Cephalometry / Q000379:methods*; D005145:Face; D005147:Facial Bones / Q000473:pathology*; D005260:Female; D005500:Follow-Up Studies; D005544:Forecasting; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008046:Lip / Q000473:pathology; D008297:Male; D008312:Malocclusion, Angle Class II / Q000473:pathology / Q000601:surgery*; D008334:Mandible / Q000473:pathology / Q000601:surgery; D019186:Mandibular Advancement / Q000379:methods; D008437:Maxilla / Q000473:pathology / Q000601:surgery; D009295:Nasal Bone / Q000473:pathology; D056948:Orthognathic Surgical Procedures / Q000379:methods*; D019340:Osteotomy, Le Fort / Q000379:methods; D059229:Osteotomy, Sagittal Split Ramus / Q000379:methods; D057887:Overbite / Q000473:pathology / Q000601:surgery; D012189:Retrospective Studies; D019291:Skull Base / Q000473:pathology; D012984:Software; D016896:Treatment Outcome; D014716:Vertical Dimension; D055815:Young Adult