Comparison of upper airway dimensions with cephalometry in different posture

Objective: To compare results of upper airway dimensions with cephalometry in different posture. Methods: A detailed cephalometric analysis was performed using lateral X-ray films in sitting position and supine position from 30 male volunteers. Results: In the supine position, the mandibular and hyoid bone was displaced; the posterior airway space (PAS) turned more narrow compared with sitting pos…