[Comparing the effects of fast and slow expansion on nasal cavity and maxilla structure].

OBJECTIVE

This study aims to compare the effects of fast and slow expansion on nasal cavity structure.

METHODS

A total of 40 patients were selected and randomly divided into two groups. Cone-beam computer tomography (CBCT) was obtained before and after surgery and used for comparing the changes in nasal structure before and after treatment.

RESULTS

Fast expansion had resulted in greater changes in the basilar and nasal bone arch extension structures than slow expansion. No significant difference at maxillary width and nasal parenchyma.

CONCLUSIONS

Rapid expansion therapy has more beneficial effects on nasal function.