TypeofBracket Index    T1(Initial)  T2 (180 days) T3 (afteralignment, 600 days) average        (mm) SD average (mm) SD average (mm) SD Self-ligating  N = 10 Little [19] 5.22a 2.04 2.58bb 1.23 1.21c 0.95 Fleming [7] 11.02a 3.88 5.38b 2.15 1.73c 1.04 Control  N = 9 Little [19] 2.39a 0.94 0.31b 0.38 0.08b 0.16 Fleming [7] 5.32a 2.67 1.42b 0.84 0.36c 0.43 Times with different lower-case letters within the same group and index have a statistically significant difference between each other.

Table 2: Average and standard deviation of both groups, and the result of Variance Analysis and of the Tukey Test for the comparison between the three times.