Fig. 11
Effect of LLLT on cellular proliferation 48 h after irradiation. Mean absorbance with the confidence interval for each group is presented. The mean absorbance of the cells treated with 0.1, 0.2 and 1.2 J/cm2 was significantly increased compared to the other groups (p <0.0001). The cells irradiated with 0.1 J/cm2 (p = 0.01) and 0.2 J/cm2 (p = 0.0434) had significantly greater cellular proliferation compared to the cells irradiated with 1.2 J/cm2. There was no significant difference in the cellular proliferation rate between the two lower energy doses (p = 0.1987), or between the control group and the cells irradiated with 10 J/cm2 (p = 0.2011). a,b,c Values with different letters are significantly (P < 0.05) different