| Nasion (Na point) |
The anterior point of the intersection between the nasal and frontal bones |
| Pogonion (Pog) |
The most anterior point on the contour of the chin |
| S point |
The midpoint of the cavity of sella turcica |
| U1 |
Most facial aspect of Upper incisor in incisal edge |
| L1 |
Most facial aspect of lower incisor in incisal edge |
| Gonion (Go) |
The midpoint of the contour connecting the ramus and mandibular body |
| Gnathion (Gn) |
The center of the inferior point on the mandibular symphysis |
| Anterior nasal spine (ANS) |
The tip of the anterior nasal spine |
| A point |
Innermost point on the contour of the premaxilla |
| Menton (Me) |
The most inferior point on the mandibular symphysis |
| Condylon (Co) |
The upper midpoint of the mandibular condyle |
| B point |
Innermost point on the contour of the mandible |
| Pterygomaxillary fissure (PTM) |
The point at the base of the fissure where the anterior and posterior walls meet |
