Fig. 7From: Zirconia Nanoparticles-Induced Toxic Effects in Osteoblast-Like 3T3-E1 CellsTiO2 and ZrO2 NP-induced mineralization effects in 3T3 cells. After the 3T3-E1 cells were differentiated using mineralized solution for 7 d, 14 d and 21 d, accompanied with TiO2 (a) and ZrO2 NPs (b) at various concentrations. The alizarin red staining was used to detect the mineralized nodule (black arrow)Back to article page