Evaluation of Low-Level Laser Light Effects With a
Wavelength of 660 nm and Different Amounts of Energy Density
on Cell Proliferation by the MTT Assay.
As it is evident in the figure, low-energy laser radiation
significantly increased the viability of Hu02 cells in doses of 1
and 5 J/cm2 (P < 0.05) and had no impact on viability of the cells
in 10 J/cm2 doses. The histograms are the mean of 3 independent
experiments; error bars represent SEM.