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Fig. 3 | BMC Oral Health

Fig. 3

From: Impact of occlusal reconstruction positions on airway dimensions in patients with edentulism and long centric occlusion

Fig. 3

Measurement items of the upper airway. (1) The distance between the posterior nasal spine (PNS) and R point. (2) The distance between the PNS and the Ad2 point. 3) The distance between the PNS and the upper pharyngeal wall (UPW). (4) The distance between the soft palate posterior (SPP) surface and the soft palate posterior pharyngeal wall (PPW) (SPPW). (5) The distance between the uvula apex (U) and the middle pharyngeal wall (MPW). (6) The McNamara line (the distance between the Mc1 and Mc2 points). (7) The posterior airway space, which is the distance between the root of the tongue (TB) and the tongue PPW (TPPW). (8) The distance between the epiglottic vallecula (V) and the lower pharyngeal wall (LPW)

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