Upper airway dimensions
OSA, epiglottis
PATHOGENESIS
The measurements of upper airway dimensions were performed using the Amira® software (v4.1, Visage Imaging Inc., Carlsbad, CA, USA). After setting the superior boundary of the upper airway (i.e., the palatal plane) and the inferior boundary (i.e., the horizontal plane across the base of the epiglottis) (Fig. Since the CSAmin is suggested to be the most relevant anatomical characteristic related to the pathogenesis of OSA [An experienced examiner who was blinded to the membership of the patients measured all the upper airway variables. Ten CBCT scans were randomly selected and re-measured after a 1-month interval of the original measurements, and the intra-rater reliability was assessed.