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Table 2 Speed of canine retraction in the two groups

From: Effect of laser corticotomy on canine retraction rate: a split-mouth randomized clinical trial

Time

Corticotomy group

Mean ± SD

Control group

Mean ± SD

Mean Diff. (95%CI)

P value

T0-T1

(First month)

± 0.30–2.36

± 0.64–1.05

-1.31

< 0.05

T1-T2

(Second month)

± 0.41–1.58

± 0.40–0.80

-0.78

< 0.05

T2-T3

(Third month)

± 0.37–0.81

± 0.27–0.66

-0.14

0.29

T3-T4

(Fourth month)

± 0.15–0.40

± 0.24–0.51

0.11

0.29

  1. Independent t-test
  2. Time 0: Before laser corticotomy; Time 1: 1 month after laser corticotomy, Time 2: 2 months after laser corticotomy, T3: 3 months after laser corticotomy, Time 4: 4 months after laser corticotomy