Abstract
Paranasal sinuses development mechanisms are not well known. Nasal air flow, according to one of the proposed theories, would be fundamental to the growth and healthy development of paranasal sinuses. The aim of this study was to evaluate the maxillary sinus growth and health in the presence and absence of postnasal air flow through a unique model. Retrospective study of a series of cases; preoperative CT scans of 7 patients with unilateral choanal atresia, average age was 16.28 years (+/- 5.024). This study was done in a tertiary hospital, with patients treated between 1994 and 2004. The area of the maxillary sinuses was measured with the aid an Auto-Cad software. Kruskal-Wallis test was used in the statistical analysis. Symmetrical or even bigger maxillary sinuses were found in the same side of the choanal atresia in 85.71% of the cases. There was no significant statistic difference between compared sides. CT Scan signs of sinus disease were not seem in these patients. These findings oppose the commonly accepted theory about the role of nasal air flow in health and development of paranasal cavities.
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