Table 2 Relevant points, distances, planes and angles

Al

Alar width

Alb

Alar base width

Albl

Deepest point at the transition between the left ala to the cheek to air at the sagittal level (left alar base)

Albr

Deepest point at the transition between the right ala to the cheek to air at the sagittal level (right alar base)

All

Furthest transverse extent of the left ala

Alr

Furthest transverse extent of the right ala

Co

Columella tangent point, bridge of the nose

FH

Frankfurt horizontal plane, two poria and an infraorbital point

Ls

Labrale superius, edge of the upper lip (transition from vermilion border to white portion)

Sn

Subnasal point, transition from the bridge of the nose to the upper lip

Sn–Ls–Co

Nasolabial angle