Figure 1

Landmarks, distances and planes used in the chephalometric analysis. Planes of reference: FH, Frankfurt horizontal plane; NL, nasal line; ML, mandibular line; FOP, functional occlusal plane; N perp, line on N perpendicular to the FH.
Landmarks, distances and planes used in the chephalometric analysis. Planes of reference: FH, Frankfurt horizontal plane; NL, nasal line; ML, mandibular line; FOP, functional occlusal plane; N perp, line on N perpendicular to the FH.