Fig. 2
From: The University Münster model surgery system for orthognathic surgery - The digital update
Schematic representation for calculating the angles and distances between the face-bow, articulator axis and occlusal plane. Pi = Porion inferior; Ax = hinge axis position of the SAM (10 mm anterior of the ear rods); Ns = Nasal rest of the face-bow; AOP = axis orbital plane represented by the face-bow; OE = occlusal plane; Ie = upper incisor edge; Dc = distobuccal cusp of the first permanent upper molar; Dc’ = section of a perpendicular line from Ax to the occlusal plane