Figure 6From: Skeletal versus conventional intraoral anchorage for the treatment of class II malocclusion: dentoalveolar and skeletal effects Cephalometric planes. NSL = sella-nasion line, PP = palatal plane, PM = mandibular plane, OL = occlusal plane, OLp = perpendicular occlusal plane passing for sella point, Ba-Na = cranio-basal plane, Pt-Gn = facial axis, E-plane = esthetic plane, N-Pg = facial plane.Back to article page