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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