An Study on the Total Nasal Resistance of Angle Class II, Division 1 Malocclusion Patients by Means of Active Anterior Rhinomanometry

Edmilsson Pedro JORGE, Jorge ABRÃO, Anibal Benedito Batista Arrais Torres de CASTRO

The aim of this study was to evaluate functional characteristics of patients with Angle Class II, Division 1 malocclusion in a sample of 30 Brazilian subjects. All patients were Caucasians, female and male, with ages ranging from 14 years old and 6 months to 25 years old and 7 months, on the permanent dentition and no previous orthodontic treatment. In this group of patients, assessment of data from active anterior rhinomanometry found that total nasal resistance average without a vasoconstrictor was 0,81mm H2 0/l/min., and with vasoconstrictor was 0,61mm H2 0/l/min. After the use of the vasoconstrictor there was a 25% decreasing of the total nasal resistance. Our results showed that: a) total nasal resistance was above the normal parameter in 23 patients (76,66%), b) nasal resistance changed following anatomic, physiologic and climatic conditions, and c) the great variation of values of the unilateral nasal resistance interferes in the total nasal resistance values.

Keywords: Active anterior rhinomanometry. Oral breathing. Total nasal resistance. Class II, Division 1 malocclusion of Angle. Upper airway.

Wednesday, May 01, 2024 22:45