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Table 2 Descriptive statistics of the canine retraction rate (mm/month) as well as the p-values of significance tests

From: Evaluation of piezocision and laser-assisted flapless corticotomy in the acceleration of canine retraction: a randomized controlled trial

Time

PG (n = 17)

LAFCG (n = 17)

PG Vs LAFCG

Experimental side

Control side

Mean Diff (95% CI)

P-Value†

Experimental side

Control side

Mean Diff (95% CI)

P-Value†

Mean Diff (95% CI)

P-Value ††

Mean

SD

Mean

SD

Mean

SD

Mean

SD

T0-T1 (1st month)

1.65

0.40

0.83

0.18

0.82 (0.67, 0.96)

< 0.001***

1.57

0.36

0.79

0.11

0.78 (0.62, 0.93)

< 0.001***

0.08 (− 0.19, 0.35)

0.554

T1-T2 (2nd month)

1.38

0.32

0.88

0.14

0.50 (0.36, 0.63)

< 0.001***

1.25

0.30

0.85

0.14

0.40 (0.28,0.52)

< 0.001***

0.12 (− 0.09, 0.35)

0.248

T2-T3 (3rd month)

1.10

0.29

0.98

0.22

0.11 (− 0.04, 0.26)

0.134

1.06

0.28

0.96

0.25

0.10 (− 0.06,0.27)

0.220

0.03 (− 0.18, 0.25)

0.738

T3-T4 (4th month)

0.87

0.11

0.94

0.09

−0.07 (− 0.20, 0.06)

0.231

0.89

0.16

0.90

0.16

−0.01 (− 0.16, 0.13)

0.791

− 0.01 (− 0.20, 0.17)

0.886

T0-T4

1.19

0.16

0.90

0.09

0.29 (0.12, 0.46)

0.007**

1.14

0.10

0.84

0.05

0.30 (0.14, 046)

0.006**

0.05 (− 0.14, 0.24)

0.564

  1. †: Paired t test, ††: two-sample t test, *Significant at P < 0.05, **Significant at P < 0.01, ***Significant at P < 0.001, PG Piezocision group, LAFCG Laser-assisted flapless corticotomy group, SD standard deviation, Mean Diff mean difference, CI Confidence interval