Correlation between hyoid bone position, width of pharynx and swallowing function before-after orthognathic surgery for mandibular deficiency

Abstract

Sagittal split ramus osteotomy (SSRO) is a common treatment for the mandibular deficiency and results in functional and aesthetic improvements. In some cases, a combination of maxillary and mandiblar osteotomies to achieve the best possible occlusal, functional, esthtic result and improvement of Obstructive Sleep Apnea. Mandibular advancement alters the positions of the tongue, hyoid bone position and width of pharynx. The aim of this study was to determine the correlation between the hyoid bone position, width of pharynx and swallowing function as evaluated before and after maxillary and mandibular orthognathic surgery.