Figure 3: Cytotoxicity of titanium dioxide nanoparticles/titanium dioxide nanotubes/titanium dioxide fine particles in mixed lymphocyte reaction of mice splenocytes, measured using 3-(4, 5-dimethylthiazol-2yl)-2, 5-diphenyl tetrazolium bromide assay on a 72h culture. titanium dioxide nanoparticles/titanium dioxide nanotubes/titanium dioxide fine particles inhibited MLR in a dose-dependent manner for a 72 h co-culture