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

Joss, Christof Urs
Triaca, A
Antonini, M
Kuijpers-Jagtman, A M
Published in International Journal of Oral and Maxillofacial Surgery. 2012, vol. 41, no. 5, p. 553-9
Abstract 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.
Keywords AdolescentAdultAlveolar Process/pathology/surgeryCephalometry/methodsFemaleFollow-Up StudiesHumansImage Processing, Computer-Assisted/methodsIncisor/pathologyMaleMalocclusion, Angle Class II/surgeryMandible/pathology/surgeryMandibular Advancement/methodsMaxilla/pathologyMiddle AgedNasal Bone/pathologyOsteogenesis, Distraction/methodsOverbite/surgeryRecurrenceRetrospective StudiesRotationSella Turcica/pathologyYoung Adult
PMID: 22356741
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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. 553-9. doi: 10.1016/j.ijom.2011.07.1071 https://archive-ouverte.unige.ch/unige:29065

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Deposited on : 2013-08-07

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