Table 2.

Age, BMI distribution and comparison of the samples

	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

T0, before bracket bonding; T1, at the end of the treatment