Table 2.
Cephalometric parameters measured.
| S. No. | Cephalometric parameter | Abbreviation | Definition |
|---|---|---|---|
| Skeletal | |||
| 1. | SNA | SNA | The inferior posterior angle formed by the intersection of lines SN and NA. |
| 2. | SNB | SNB | The inferior posterior angle formed by the intersection of lines SN and NB. |
| 3. | ANB | ANB | Difference between SNA and SNB. |
| 4. | Na perpendicular to point A | N perp-A | Perpendicular distance between nasion perpendicular and point A. |
| 5. | Na perpendicular to Pog | N perp-Pog | Perpendicular distance between nasion perpendicular and pogonion. |
| Dental | |||
| 6. | U1–NA (°) | U1-NA (°) | Angle formed by long axis of most prominent upper incisor (U1) and NA plane. |
| 7. | U1 to NA (mm) | U1-NA (mm) | Linear distance between long axis of most prominent upper incisor and NA plane. |
| 8. | PTV to U6 (mm) | PTV-U6 (mm) | Distance from the pterygoid vertical to mesiobuccal cusp of maxillary first molar. |
| 9. | L1 to NB (degree) | L1-NB (°) | Angle formed by long axis of most prominent lower incisor (L1) and NB plane. |
| 10. | L1 to NB (mm) | L1-NB (mm) | Linear distance between long axis of most prominent lower incisor and NB plane. |
| 11. | PTV to L6 (mm) | PTV-L6 (mm) | Distance from the pterygoid vertical to mesiobuccal cusp of mandibular first molar. |
| 12. | U1 to L1 (angle) | U1-L1(°) | Angle formed by long axis of most prominent upper incisor and between long axis of most prominent lower incisor. |
| Growth pattern | |||
| 13. | Saddle angle | Saddle angle | Angle formed by nasion, sella, and articulare. |
| 14. | Articulare angle | Articulare angle | Angle formed by sella, articulare, and gonion. |
| 15. | Gonial angle | Gonial angle | Angle formed by articulare, gonion, and menton. |
| 16. | Sum of Saddle, Articulare and Gonial angle | Sum (Bjork angle) | Sum of saddle, articulare, and gonial angles. |
| 17. | FMA | FMA | Angle formed by Go-Me plane and Frankfort horizontal plane. |
| 18. | Go-Gn to Sn | Go-Gn to Sn | Angle formed by Go-Gn plane and sella nasion plane. |
| Soft tissue | |||
| 19. | Nasolabial angle | Nasolabial angle | Angle formed by columella and philtrum of upper lip. |
| 20. | Lower lip to E line/inferior E plane | Li-E line | Linear distance between E line and lower lip anterior/labrale inferius. |