Sagittal airway changes: rapid palatal expansion versus Le Fort I osteotomy during maxillary protraction
| Autor: | Nazan Küçükkeleş, Banu Cakirer, Şirin Nevzatoğlu, Tamer Koldaş |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Male
Palatal Expansion Technique Time Factors Adolescent Cephalometry medicine.medical_treatment Oropharynx Dentistry Orthodontics Maxillary protraction Retrognathia Osteotomy Statistics Nonparametric Nasopharynx Oropharyngeal airway Maxilla medicine Extraoral Traction Appliances Humans Osteotomy Le Fort Craniofacial Child Maxillary Osteotomy Maxillofacial Development Dentofacial Deformities business.industry Mandible Sagittal plane Malocclusion Angle Class III medicine.anatomical_structure Regression Analysis Female Airway business |
| Zdroj: | The European Journal of Orthodontics. 34:381-389 |
| ISSN: | 1460-2210 0141-5387 |
| DOI: | 10.1093/ejo/cjr023 |
| Popis: | SUMMARY 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. |
| Databáze: | OpenAIRE |
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