The Korean Association of Orthodontists

Fig. 2. Horizontal planes associated with the cranium (a, Broadbent’s plane = sella–nasion plane; b, optical axis plane). Rt, Right; Lt, left; MidON, mid optic nerve.

Korean J Orthod 2020;50:258~267 https://doi.org/10.4041/kjod.2020.50.4.258