Research Article

Biphasic Osteogenic Characteristics of Human Mesenchymal Stem Cells Cultured on T i O 2 Nanotubes of Different Diameters

Figure 4

MTT assay for cell viability and proliferation showing the optical density of the reaction product of the MTT working solution with human mesenchymal stem cells cultured on nanotubular surface as a function of incubation time. x The data of control group (Ti) was significantly higher than that of experimental (TiO2 nanotubes) group ( 𝑃 < 0 . 0 5 ) .
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