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Progress in Orthodontics

Table 3 Little’s irregularity index before and after treatments

From: Accuracy of interproximal enamel reduction during clear aligner treatment

 

Little’s irregularity index T0

Little’s irregularity index T1

P value

Mean

SD

Mean

SD

Upper arch

7.26

3.30

2.81

1.72

< 0.001

Lower arch

8.13

4.10

2.66

1.57

< 0.001

  1. P value < 0.05 was considered as significant
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