Measures Mean advancea
(mm)
Relation with
upper central incisor
(%)
Tck UL -0.3 -3
Sn-ULI 1.6 17
Exp Mx1 -1.4 -15
Nose -2.1 -23
A' 0.6 7
ULA 0.2 3

aMean advance = 9.58 mm, corresponding to the average sagittal displacement of the maxillary incisor (Mx1) in the total sample.
Tck UL = upper lip thickness; Sn-ULI = upper lip length; Exp Mx1 = upper incisor exposure; Nose = nasal apex; A' = A' point; ULA = anterior upper lip.