Figure 1.
Definitions and abbreviations of the cephalometric variables
| Abbreviation | Cephalometric Variables |
|---|---|
| SNA | Angle formed by sella-nasion-A point |
| SNB | Angle formed by sella-nasion-B point |
| ANB angle | Angle formed by A point-nasion-B point |
| TAFH | Total anterior facial height: linear distance between nasion (N) and menton (Me) |
| UAFH | Upper anterior facial height: linear distance between N and ANS' (perpendicular projection of anterior nasal spine in line N-Me) |
| LAFH | Lower anterior facial height: linear distance between ANS' and Me |
| TPFH | Total posterior facial height: linear distance between sella (S) and gonion (Go) |
| UPFH | Upper posterior facial height: linear distance between S and Ar' -perpendicular projection of articulare (Ar) in line (SGo) |
| LPFH | Lower posterior facial height: linear distance between Ar' and Go |
| MxI.NA | Angle formed by maxillary incisors' long axis and line NA |
| MxI-NA | Linear distance from buccal surface of most protruded maxillary incisor to line NA |
| Mdl.NB | Angle formed by mandibular incisors' long axis and line NB |
| Mdl-NB | Linear distance from buccal surface of most protruded mandibular incisor to line NB |
| IMPA | Angle formed by mandibular incisors' long axis and mandibular plan (Go-Me) |
| Nasolabial angle | Angle formed by line from lower border of nose to line representing inclination of upper lip |
| Upper lip protrusion | Linear distance between upper lip anterior point and subnasale-pogonion line |
| Lower lip protrusion | Linear distance between lower lip anterior point and subnasale-pogonion line |