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- Title
Effects on the sagittal pharyngeal dimensions of protraction and rapid palatal expansion in Class III malocclusion subjects.
- Authors
Kilinç, Ali Serdar; Arslan, Seher Gündüz; Kama, Jalen Devecioğlu; Özer, Törün; Dari, Osman
- Abstract
This study examined the effects of rapid palatal expansion (RPE) and maxillary protraction headgear therapy in 18 patients with a skeletal Class III malocclusion (11 girls and seven boys; mean age 10.9 years) on upper airway dimensions compared with an untreated control group (nine girls and eight boys; mean age 10.9 years). Pre- and post-treatment cephalometric radiographs were traced and analysed at similar time intervals. The average treatment time was 6.94 ± 0.56 months. Wilcoxon's test was used for intragroup comparisons and the Mann-Whitney U-test for intergroup comparisons. A significant increase occurred in the maxillary forward position. Mandibular forward movement and downward and backward rotation were inhibited. In addition, the upper incisors were proclined (P < 0.001), and the lower incisors were significantly retroclined (P < 0.05). When the treatment and control groups were compared, the upper airway linear measurements (pns-ad¹, pns-ad², APW-PPW, APW'-PPW') and the nasopharyngeal area had increased in the treatment group. These results demonstrated that maxillary expansion together with protraction of the maxilla improved naso- and oropharyngeal airway dimensions in the short term.
- Subjects
PALATE abnormalities; MAXILLA; MALOCCLUSION; CEPHALOMETRY; MANDIBLE
- Publication
European Journal of Orthodontics, 2008, Vol 30, Issue 1, p61
- ISSN
0141-5387
- Publication type
Article
- DOI
10.1093/ejo/cjm076