Table 1 Definitions of variables in the classification of individuals regarding skeletal patterns (skeletal malocclusions and facial types)
Skeletal pattern | Variables | Definition |
|---|---|---|
Skeletal malocclusion | SNA | Angle formed from the points Sella (S), Nasion (N) and A |
SNB | Angle formed from the points Sella (S), Nasion (N) and B | |
ANB | Angle formed from the points A, Nasion (N) and B | |
Facial type | Facial depth | Angle formed by intersecting the lines Po (Porion)—Or (Orbitale) and N (Nasion)—Pog (Pogonion) |
Facial axis angle | Angle formed by intersecting the lines N (Nasion)—Ba (Basion) and Pt (Pterygoid Point)—Gn (Gnathion) | |
Lower facial height | Angle formed by intersecting the lines Xi (Geometric center of the ramus)—ANS (Anterior nasal spine) and Xi (Geometric center of the ramus)—Pm (Suprapogonion) | |
Mandibular plane angle | Angle formed by intersecting the lines Go (Gonion)—Me (Menton) and Po (Porion)—Or (Orbitale) | |
Mandibular arch | Angle formed by intersecting the lines Dc (Point in the center of the mandibular condyle)—Xi (Geometric center of the ramus) and Xi (Geometric center of the ramus)—Pm (Suprapogonion) |