Measures Mean advancea
(mm)
Relation with
upper central incisor
(%)
Ang Mx1 1.92 58
Overjet 7.22 0.02
Overbite 1.73 52
Tck UL 0.58 18
Sn-ULI 2.47 74
Exp Mx1 -1.02 -31
Nose -2.04 -62
A' 0.5 15
ULA 0.11 3
G'-A' -0.43 -13
ULA-LLA 7.47 0.02

aTotal mean advance = 3.31 mm, corresponding to the average sagittal displacement of the maxillary incisor (Mx1) in patients with advancements ≤ 5 mm
Ang Mx1 = maxillary incisor-maxillary occlusal plane angle; 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; G'-A' = glabella to A' point; ULA-LLA = upper lip-lower lip.