| 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 |