Figure 1From: Skeletal and dental effects produced by functional regulator-2 in pre-pubertal class II patients: a controlled studyLandmarks, 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.Back to article page