Phonetics is the study of sounds of human speech, including their production and perception. Orthognathic surgery, on the other hand, is a surgical procedure aimed at correcting skeletal and dental irregularities of jaw and face and following the completion of growth it is indicated in about 25% of patients with cleft lip and palate. Despite the numerous advantages that orthognathic surgery offers for aesthetics and orofacial functions, velopharyngeal...