title: Skeletal Class II treatment with Twin Force Bite Corrector: case reports.
abstract: OBJECTIVE
  To analyze the effectiveness of the Twin Force Bite Corrector in 2 patients requiring anterior advancement of the mandible.
  
  
  METHODS
  To correct the imbalanced maxillomandibular relationship, a Twin Force Bite Corrector was inserted in 2 female adolescents (case 1: 12 years 3 months of age; case 2: 12 years 7 months of age) presenting with a skeletal Class II malocclusion. The pretreatment, posttreatment, and follow-up dental and skeletal parameters were evaluated on lateral cephalometric radiographs. Twenty-two reference points were marked and 23 variables measured for each set of lateral cephalograms.
  
  
  RESULTS
  The Twin Force Bite Corrector therapy lasted for 3 months in both patients. The total orthodontic treatment duration was 1 year 4 months for case 1 and 1 year 6 months for case 2. In both patients, the overjet reduced, the mandibles advanced, and a Class I molar relationship was achieved. Effective mandibular length (Co-Gn) increased significantly, while the mandibular incisors almost kept their initial positions without a significant change in inclination (L1/ML). The clinical profiles of both girls remarkably improved.
  
  
  CONCLUSIONS
  The Twin Force Bite Corrector was effective in the correction of skeletal Class II malocclusion with retrognathic mandible, with negligible anchorage loss in the mandibular arch.
authors.affiliation: Department of Orthodontics, School of Dentistry, University of Ankara, Ankara, Turkey. aysealtug@yahoo.com
authors.forename: Ayşe Tuba
authors.initials: AT
authors.lastname: Altuğ-Ataç
authors.forename: Öykü Nebioğlu
authors.initials: ÖN
authors.lastname: Dalcı
authors.forename: Ufuk Toygar
authors.initials: UT
authors.lastname: Memikoğlu
mesh_terms: D002508:Cephalometry / Q000379:methods; D002648:Child; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor / Q000473:pathology; D008312:Malocclusion, Angle Class II / Q000628:therapy*; D008334:Mandible / Q000473:pathology; D019186:Mandibular Advancement / Q000295:instrumentation; D008437:Maxilla / Q000473:pathology; D016382:Orthodontic Appliance Design; D017289:Orthodontic Appliances, Functional; D009969:Orthodontic Wires; D057887:Overbite / Q000628:therapy; D010347:Patient Care Planning; D063173:Retrognathia / Q000628:therapy; D013997:Time Factors; D014087:Tooth Movement Techniques / Q000295:instrumentation; D016896:Treatment Outcome; D014716:Vertical Dimension