Fig. 5

Effect of LLLT, LIPUS, and combination of them on orthodontic tooth movement in rats at days 1, 3, 7, 14, and 21. At days 14 and 21, all the treatment groups were significantly higher than the control group. Among the treatment groups, the combination group was the highest, while the LIPUS group was the lowest; the data are shown as the mean ± SEM of three separate experiments. *P ≤ 0.05 between groups