Evaluation in time of the stability of tongue, airway volume and hyoid in orthognathic surgery patients skeletal class III

Abstract

Background: This study evaluates the volumetric dimensional changes in the upper airway level of the nasopharynx and oropharynx and the stability of the tongue and hyoid bone after Lefort I Osteotomy of maxillary advancement osteotomy and bilateral sagittal backward branch in patients with Class III skeletal deformity. 19 adult patients (12 men–7 women), Class III skeletal (average age), CT cone-beam was performed (cone-beam CT) one week before the procedure surgery, three months later and over 18 months later the surgery.