Table 3.

Descriptive statistics of RMS on extraction side and non-extraction side (/mm)

	RMS extraction side	RMS non-extraction side
T1-T0	0.537 ± 0.201	0.555 ± 0.153
T2-T0	0.648 ± 0.257	0.545 ± 0.149
T2-T1	0.622 ± 0.319	0.563 ± 0.151