Abstract
Surgically assisted maxillary expansion (EMCA) is a procedure to correct the transverse discrepancy between the dental arches caused by maxillary atresia. The nasal cavity has a close relationship with the maxilla, so it is believed that EMCA may cause some degree of deviation of the nasal septum when the expander is activated and during expansion progression. Eleven young adults underwent computed tomography preoperatively (T1) and 3 months (T2) after EMCA. Measurements were performed using specific software (ONIS ® 3.2) to measure the deviation of the nasal septum at T1 and T2. Septal deviation was present in 63.6% (T1) and 81.8% (T2) of cases. Distances of the nasal septum to the walls of the nasal cavity showed an increase at T2 compared to T1, although the difference did not reach statistical significance (p < 0.625).
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