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Progress in Orthodontics

Table 5 Comparison of median of OPG gene expression levels among the study groups at day 21

From: Effect of low level laser and low intensity pulsed ultrasound therapy on bone remodeling during orthodontic tooth movement in rats

Comparison of groups

n

Median (IqR)

X2-Statistica (df)

P valueb

Non- treat.

6

0.782 (0.23)

  

Ortho. Control

6

1.923 (0.21)

  

LLLT 100 mW

6

2.248 (0.19)

10.783 (4)

0.000

LIPUS

6

2.531 (0.18)

  

LLLT 100 mW + LIPUS

6

2.990 (0.22)

  
  1. IqR interquartile range
  2. aKruskal-Wallis test was applied
  3. bMann-Whitney test with Bonferroni correction for individual pair was applied, P < 0.001
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