Fig. 1From: Changes in the pharyngeal airway after different orthognathic procedures for correction of class III dysplasiaThe lower pharyngeal airway was located between the palatal plane, extending to the posterior pharyngeal wall (superior limit), and a plane parallel to the palatal plane passing through vertebra C4 (inferior limit). The lower pharyngeal airway was divided into three segments including the velopharynx (VP), oropharynx (OP), and hypopharynx (HP)Back to article page