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

Progress in Orthodontics

Table 3 Comparisons of root resorption between the groups on the vibration side

Variables	No-force (N = 10)	Force (N = 10)	U	P
Variables	Mean ± SD/mm³	Mean ± SD/mm³	U	P
Buccal	0.000	0.161 ± 0.107	0.000	< 0.001*
Palatal	0.002 ± 0.005	0.074 ± 0.078	11.000	0.001*
Mesial	0.015 ± 0.047	0.144 ± 0.089	8.500	0.001*
Distal	0.005 ± 0.015	0.098 ± 0.085	6.000	0.001*
Cervical	0.000	0.201 ± 0.112	5.000	< 0.001*
Mid	0.018 ± 0.056	0.186 ± 0.154	7.000	0.001*
Apical	0.003 ± 0.009	0.088 ± 0.085	7.500	0.001*
Total	0.017 ± 0.337	0.476 ± 0.236	0.000	< 0.001*

Mann–Whitney U test, *p ≤ 0.05 statistical significance at level α = 0.05. SD standard deviation