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Fig. 3 | Progress in Orthodontics

Fig. 3

From: 3D evaluation of the morphological and volumetric changes of the tongue and oral cavity before and after orthognathic surgery for mandibular prognathism: a preliminary study

Fig. 3

Definition of the measurement area of OCC and TV. a The occlusal plane (gray) was defined as the plane passing through the central cusp of the lower first molars and the incisal edge of the right central incisor. The posterior plane (blue) was defined as the plane passing through the distal cusp of the upper second molar perpendicular to the occlusal plane. b The inferior plane (red) was defined as the plane passing through the lingual frenulum parallel to the occlusal plane. c The oral cavity capacity (OCC) was defined as the space surrounded by the upper and lower dental arches, palate, posterior plane, and inferior plane (yellow). d Tongue volume (TV) was defined as the area of the tongue within OCC (pink plus yellow)

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