From: Evaluation of the maxillary midline, curve of the upper lip, smile line and tooth shape: a prospective study of 140 Caucasian patients
GENDER
Total
Female
Male
N
%
140
100,0%
70
Upward
66
47,1%
36
51,4%
30
42,9%
Straight
58
41,4%
28
40,0%
Downward
16
11,4%
4
5,7%
12
17,1