Table 1: Definition of landmarks.

Landmarks Definition
Sella (S) The center of sella turcica
Nasion (N) The most anterior point on the frontonasal suture
Menton (ME) The most inferior point on the symphyseal outline
Pogonion (POG) The most anterior point on the mandibular symphysis
Anterior nasal spine (ANS) Tip of the anterior nasal spine
Posterior nasal spine (PNS) The tip of the posterior nasal spine
Orbitale (OR) The most inferior point on the lower border of the bony orbit
Porion (P) The most superior point on the outline of the external auditory meatus
Constructed Gonion (GO) The intersection of the mandibular plane with a plane through Articulare, Posterior and along the portion of the mandibular ramus inferior to it
A point (A) The deepest point of the curve of the maxilla between the anterior nasal spine and the dental alveolus
B point (B) the deepest point on the bony curvature between the crest of the alveolus and pogonion
Articulare (AR) The point of intersection between the posterior border of the mandibular condyle and the lower border of the cranial base