Scientific article
Open access

Skeletal and dental stability of segmental distraction of the anterior mandibular alveolar process. A 2-year follow-up

Published inInternational journal of oral and maxillofacial surgery, vol. 41, no. 5, p. 553-559
Publication date2012

33 patients (27 females; 6 males) were retrospectively analysed for skeletal and dental relapse before distraction osteogenesis (DOG) of the mandibular anterior alveolar process at T1 (17.0 days), after DOG at T2 (mean 6.5 days), at T3 (mean 24.4 days), and at T4 (mean 2.0 years). Lateral cephalograms were traced by hand, digitized, superimposed, and evaluated. Skeletal correction (T3-T1) was mainly achieved through the distraction of the anterior alveolar segment in a rotational manner where the incisors were more proclined. The horizontal backward relapse (T4-T3) measured -0.8mm or 19.0% at point B (p<0.001) and -1.6mm or 25.0% at incision inferior (p<0.001). Age, gender, amount and type (rotational versus translational) of advancement were not correlated with the amount of relapse. High angle patients (NL/ML'; p<0.01) and patients with large gonial angle (p<0.05) showed significantly smaller relapse rates at point B. Overcorrection of the overjet achieved by the distraction was seen in a third of the patients and could be a reason for relapse. Considering the amount of skeletal relapse the DOG could be an alternative to bilateral sagittal split osteotomy for mandibular advancement in selected cases.

  • Adolescent
  • Adult
  • Alveolar Process/pathology/surgery
  • Cephalometry/methods
  • Female
  • Follow-Up Studies
  • Humans
  • Image Processing, Computer-Assisted/methods
  • Incisor/pathology
  • Male
  • Malocclusion, Angle Class II/surgery
  • Mandible/pathology/surgery
  • Mandibular Advancement/methods
  • Maxilla/pathology
  • Middle Aged
  • Nasal Bone/pathology
  • Osteogenesis, Distraction/methods
  • Overbite/surgery
  • Recurrence
  • Retrospective Studies
  • Rotation
  • Sella Turcica/pathology
  • Young Adult
Citation (ISO format)
JOSS, Christof Urs et al. Skeletal and dental stability of segmental distraction of the anterior mandibular alveolar process. A 2-year follow-up. In: International journal of oral and maxillofacial surgery, 2012, vol. 41, n° 5, p. 553–559. doi: 10.1016/j.ijom.2011.07.1071
Main files (1)
Article (Published version)
ISSN of the journal0901-5027

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