Mandibular effects of maxillary distraction osteogenesis in cleft lip and palate

Abstract : Maxillary distraction osteogenesis (DO) is a reliable treatment for severe maxillary deficiency in cleft lip and palate (CLP). The objective was to analyze its long-term effects on the mandible. A retrospective study of 24 CLP treated with maxillary DO using the Polley and Figueroa technique was done; patients were followed for more than 4 years. Preoperative (T0), 6–12 months postoperative (T1), and ≥4 years postoperative (T2) cephalometric radiographs were evaluated. A classical cephalometric analysis was used to assess treatment stability, and a Procrustes superimposition method was used to assess local changes in the shape of the mandible. The mean age of patients at T0 was 15.4 ± 4.1 years. SNA increased at T1 and T2 (P < 0.001), with no significant relapse between T1 and T2, indicating stability at 1 year after treatment (T0 = 72.4 ± 5.3°; T1 = 81.3 ± 6.2°; T2 = 79.9 ± 6.1°). SNB, facial angle, gonial angle, and symphyseal angle remained stable. Long-term analysis of the mandible demonstrated a minimal counter-clockwise rotation of the body (mandibular plane = −0.2 ± 3.2°) and ramus (−0.6 ± 4.3°). Maxillary DO in CLP had no significant effect on the shape or rotation of the mandible. The maxillary advancement remained stable after 1 year.
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Submitted on : Wednesday, February 17, 2016 - 11:22:10 PM
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Jean-Charles Doucet, Christian Herlin, Michèle Bigorre, Caroline Bäumler, Gérard Subsol, et al.. Mandibular effects of maxillary distraction osteogenesis in cleft lip and palate. International Journal of Oral and Maxillofacial Surgery, Elsevier, 2014, 43 (6), ⟨http://www.sciencedirect.com/science/article/pii/S0901502714000605⟩. ⟨10.1016/j.ijom.2014.01.017⟩. ⟨lirmm-01275685⟩

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