Table 3. Comparison of the difference in the upper LII scores between T0 (pretreatment) and T4 (after alignment) for MBT and Damon3 MX bracket systems .

Bracket type	Mean T0 (SD)	Mean T4 (SD)	Mean T0-T4 (SD)
MBT	5.63 (1.45)	0.68 (0.85)	4.95 (1.30)
Damon3 MX	6.90 (1.66)	0.86 (1.18)	6.04 (0.99)
Comparison between groups	T=2.23 P=0.034*	T=0.47 P=0.63	T=2.58 P=0.015*

*P<0.05.