Fig. 4From: The structural changes of pharyngeal airway contributing to snoring after orthognathic surgery in skeletal class III patientsLandmark measurements for surgical skeletal movements. The distances of maxillary and mandibular movements between prior to and after two-jaw surgery were measured at PNS, U1, and B point. U1 maxillary first molar root apices, B points innermost curvature from chin to alveolar bone junction, PNS posterior nasal spine, PDI posterior differential impaction)Back to article page