An Investigation of Upper Airway Changes Associated With Mandibular Advancement Device Using Sleep Videofluoroscopy in Patients With Obstructive Sleep Apnea

Abstract

Sleep videofluoroscopy showed dynamic upper airway changes in patients with OSA, and the MAD exerted multiple effects on the size and configuration of the airway. Sleep videofluoroscopy demonstrated the mechanism of action of the MAD in patients with OSA. The MAD increased the retropalatal and retrolingual spaces and decreased the length of the soft palate and the angle of mouth opening, resulting in improvement of OSA.

Correlation between Craniofacial Structures and Severity of Obstructive Sleep Apnea

“…The upper airway space was reduced (SPAs 11.82 mm; Mas 5.92 mm; IAS 8.909 mm) and the palatal structure was increased (Length 43.27 mm; height 9.78 mm and angle 121.1°). The present data was similar to other researches [24][25][26][27][28].…”

Peripharyngeal tissue deformation, stress distributions, and hyoid bone movement in response to mandibular advancement

“…The present findings are most similar to those obtained in anesthetized healthy and OSA subjects, likely reflecting similar neuromechanical conditions. Similar to findings in the present study, mandibular advancement-associated anteroposterior and lateral diameter increases have also been reported in anesthetized human subjects (healthy and OSA) at velopharyngeal and oropharyngeal levels (11,12,18,19), whereas in awake OSA subjects only lateral dimension increases with no anteroposterior diameter change are generally described (5,23,26,33). Thus these reports suggest that mandibular advancement ef-fects on regional pharyngeal lumen dimensions (particularly the oropharynx) appear to be influenced by the mechanical properties of the peripharyngeal tissue mass itself, in particular the presence or absence of upper airway muscle tone.…”

Determinants of Treatment Outcome After Use of the Mandibular Advancement Device in Patients With Obstructive Sleep Apnea

“…We have shown in our previous study that the MAD increased retrolingual and retropalatal spaces and decreased the length of the soft palate and mouth opening angle. 8 In the success group, the effect of MAD application showed results similar to our previous study. The MAD increased retropalatal and retrolingual space and decreased the length of the soft palate and the mouth opening angle significantly in the success group.…”