From: Three dimensional quantitative study of soft tissue changes in nasolabial folds after orthodontic treatment in female adults
Non-extraction
Extraction
P-value
Age
24.83 ± 3.46
25.09 ± 4.04
0.80
T0
20.70 ± 1.55
20.10 ± 1.40
0.16
T1
20.80 ± 1.56
20.40 ± 1.27
0.35