Patients with a history of mouth breathing for at least six months, with nasal obstruction, pallid or hyperemic nasal mucosa, with or without hypertrophy of adenoid (volume occupying less than 70% of airway) and tonsils (grade I or II), and nonobstructive nasal septal deviation/turbinate (Brozek et al.), conditions observed by the otorhinolaryngology specialist during clinical examination and nasal fibroscopy, were included.