Fig. 6
Effect of LLLT on wound size 12 h after irradiation. Linear mean length with the confidence interval for each wounded area is presented. There was a significant reduction in the linear mean length of the control positive (p < 0.0001) and the cells irradiated with 0.1 J/cm2 (p = 0.0001), 0.2 J/cm2 (p = 0.0003) and 1.2 J/cm2 (p = 0.026) compared to the cells irradiated with 10 J/cm2. A significant diminution of the surface area was also noted between the control positive (p < 0.0001) and the cells irradiated with the two lower energy doses (p < 0.01) compared to the control negative, and between the control positive and the cells irradiated with 1.2 J/cm2 (p = 0.0013). There was no significant difference in the linear mean length between the control negative and the cell irradiated with 1.2 J/cm2 (p = 0.2358), nor between the three groups with lower irradiation (p > 0.08). a,b,c,d Values with different letters are significantly (P < 0.05) different