Maxillary skeletal components | |
SNA | SN to NA angle |
Co-A | Condylion to A-point distance |
Mandibular skeletal components | |
SNB | SN to NB angle |
Co-Gn | Condylion to gnathion distance |
Maxillomandibular relationship | |
ANB | NA to NB angle |
NAP | Angle between lines NA and AP |
Growth pattern | |
SN.GoGn | SN to GoGn angle |
LAFH | ANS, anterior nasal spine to menton distance |
Maxillary dentoalveolar components | |
Mx1.NA | Maxillary incisor long axis to NA angle |
Mx1-NA | Distance between most anterior point of crown of maxillary incisor and NA line |
Mx1-PP | Perpendicular distance between the incisal edge of the maxillary incisor and the palatal plane |
Mx6-PP | Perpendicular distance between the maxillary first molar mesial and distal cusps midpoint and the palatal plane |
Mx Molar asymmetry | Difference in the distance between most mesial points of right and left maxillary first molars, perpendicular to Svert Line (Mx6-Svert) |
Mandibular dentoalveolar components | |
Md1.NB | Mandibular incisor long axis to NB angle |
Md1-NB | Distance between most anterior point of crown of mandibular incisor and NB line |
IMPA | Incisor mandibular plane angle |
Md1-GoGn | Perpendicular distance between the incisal edge of the mandibular incisor and the mandibular plane |
Md6-GoGn | Perpendicular distance between the mesiobuccal cusp tip of the mandibular first molar and the mandibular plane |
Md Molar asymmetry | Difference in the distance between most mesial points of right and left maxillary first molars, perpendicular to Svert Line (Md6-Svert) |
Dental relationship | |
Overjet | Distance between incisal edges of maxillary and mandibular central incisors, parallel to occlusal plane |
Overbite | Distance between incisal edges of maxillary and mandibular central incisors, perpendicular to occlusal plane |
Upper lip | |
UL-S line | Distance from the upper lip to Steiner’s S line (line from Pg’ to Cl) |
Prn-H | Distance between H line and the most anterior point on the nose |
Lower lip | |
LL-S line | Distance from the lower lip to Steiner’s S line |
Facial convexity and nasolabial angle | |
Z angle | Angle formed by the intersection of Frankfort horizontal plane and a line connecting the soft-tissue chin (Pg’) and the most protrusive lip point |
N’.Sn.Pog’ | Facial convexity |
Cm.Sn.UL | Nasolabial angle |