Abstract
Anatomic abnormality is an important pathogenic factor of obstructive sleep apnea syndrome. Airflow through the upper airway is a dynamic process involving fluid-structure interactions from a mechanical point of view. In this study, a general finite element model of the upper airway and surrounding tissues was transformed to a new configuration to simulate the results of maxillomandibular advancement surgery. The breathing process was simulated for both the general and transformed models by applying the same loading and boundary conditions. The simulation results showed that the maximum strain was obviously reduced and the pressure gradient around the oropharynx became smoother after morphological transformation.
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