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Fig. 1 | Maxillofacial Plastic and Reconstructive Surgery

Fig. 1

From: Postoperative changes in the pharyngeal airway space through computed tomography evaluation after mandibular setback surgery in skeletal class III patients: 1-year follow-up

Fig. 1

Pharyngeal airway division and measurements. a The airway space divided into three areas based on reference planes. (1) a plane parallel to the FH plane passing through CV1; (2) a plane parallel to the FH plane passing through CV2; (3) a plane parallel to the FH plane passing through CV4; A, the nasopharyngeal volume; B, oropharyngeal volume; C, hypopharyngeal volume; (a) nasopharyngeal antero-posterior distance; (b) oropharyngeal antero-posterior distance; (c) hypopharyngeal anteroposterior distance. b Measurement of SV-B. (4) sella vertical plane; (d) the distance from the sella vertical plane to the B point. PNS posterior nasal spine

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