Journal Article

Sagittal airway changes: rapid palatal expansion versus Le Fort I osteotomy during maxillary protraction

Banu Cakirer, Nazan Kucukkeles, Sirin Nevzatoglu and Tamer Koldas

in The European Journal of Orthodontics

Published on behalf of European Orthodontics Society

Volume 34, issue 3, pages 381-389
Published in print June 2012 | ISSN: 0141-5387
Published online April 2011 | e-ISSN: 1460-2210 | DOI:
Sagittal airway changes: rapid palatal expansion versus Le Fort I osteotomy during maxillary protraction

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The purpose of the present study was to evaluate upper airway changes related to craniofacial changes induced by a facemask (FM) combined with Le Fort I osteotomy without down-fracture in Class III maxillary retrusion subjects (group 1) when compared with a similar group of subjects treated with traditional rapid palatal expansion and FM therapy. Pre- (T1) and post- (T2) protraction cephalometric radiographs of group 1 (10 females and 6 males; mean age 12.75 ± 1.91 years) and group 2 (7 females and 9 males; mean age 12 ± 1.7 years) were traced. The treatment duration was 149 ± 14 days (approximately 5 months) and 270 ± 46 days (approximately 9 months) for groups 1 and 2, respectively. A paired t-test for intergroup comparisons of values at T1, an independent samples t-test for intragroup comparisons of values at T1 and T2, and a non-parametric Mann–Whitney U-test for intergroup comparisons were used. To evaluate the relationship between changes in upper airway dimension and craniofacial morphology, a multiple-regression analysis was performed.

Significant maxillary protraction along with clockwise rotation of the mandible was achieved in both groups. Counter-clockwise maxillary rotation was significant in group 1 (P < 0.05) but not in group 2. While nasopharyngeal measurements (PNS–ad1, PNS–ad2) showed significant increases (P < 0.05) as a result of treatment in both groups, oropharyngeal measurements did not change. Maxillary protraction, which was achieved in both groups but in a shorter period of time in group 2, improved nasopharyngeal but not oropharyngeal airway dimensions.

Journal Article.  5123 words.  Illustrated.

Subjects: Restorative Dentistry and Orthodontics

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