The effect of 12 weeks of mechanical vibration on root resorption: a micro-CT study

Progress in Orthodontics

Table 4 Comparisons of root resorption between the groups on the control side

Variables	No-force (N = 10)	Force (N = 10)	U	P
Variables	Mean ± SD/mm³	Mean ± SD/mm³	U	P
Buccal	0.019 ± 0.054	0.176 ± 0.192	8.000	0.001*
Palatal	0.009 ± 0.03	0.062 ± 0.056	12.500	0.002*
Mesial	0.000	0.142 ± 0.175	10.000	0.001*
Distal	0.002 ± 0.003	0.082 ± 0.078	13.000	0.003*
Cervical	0.028 ± 0.084	0.186 ± 0.148	7.000	0.001*
Mid	0.001 ± 0.002	0.21 ± 0.231	0.000	< 0.001*
Apical	0.002 ± 0.006	0.066 ± 0.06	6.500	< 0.001*
Total	0.031 ± 0.085	0.462 ± 0.337	2.000	< 0.001*

Wilcoxon signed-rank test, *p ≤ 0.05 statistical significance at level α = 0.05. SD standard deviation