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Table 1 Skeletal, dental and soft tissue cephalometric variables

From: Dentoskeletal and soft tissue changes in class II subdivision treatment with asymmetric extraction protocols

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