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- Title
Effect of rapid maxillary expansion on the dimension of the nasal cavity and on facial morphology assessed by acoustic rhinometry and rhinomanometry.
- Authors
Itikawa, Carla Enoki; Pereira Valera, Fabiana Cardoso; Nakane Matsumoto, Mírian Aiko; Anselmo Lima, Wilma Terezinha
- Abstract
Objective: To assess the effects of rapid maxillary expansion on facial morphology and on nasal cavity dimensions of mouth breathing children by acoustic rhinometry and computed rhinomanometry. Methods: Cohort; 29 mouth breathing children with posterior crossbite were evaluated. Orthodontic and otorhino-laryngologic documentation were performed at three different times, i.e., before expansion, immediately after and 90 days following expansion. Results: The expansion was accompanied by an increase of the maxillary and nasal bone transversal width. However, there were no significant differences in relation to mucosal area of the nose. Acoustic rhinometry showed no difference in the minimal cross-sectional area at the level of the valve and inferior turbinate between the periods analyzed, although rhinomanometry showed a statistically significant reduction in nasal resistance right after expansion, but were similar to pre-treatment values 90 days after expansion. Conclusion: The maxillary expansion increased the maxilla and nasal bony area, but was inefficient to increase the nasal mucosal area, and may lessen the nasal resistance, although there was no difference in nasal geometry. Significance: Nasal bony expansion is followed by a mucosal compensation.
- Subjects
MAXILLARY expansion; NASAL cavity; MOUTH breathing; NASAL bone; MAXILLA
- Publication
Dental Press Journal of Orthodontics, 2012, Vol 17, Issue 4, p129
- ISSN
2176-9451
- Publication type
Article
- DOI
10.1590/S2176-94512012000400024