Fig. 8
The cell viability of NIH-3T3 cells was evaluated by MTT assay on the sintered 3D-printed bioceramic scaffolds at 24 and 48 h. The SDS is used as a positive control, and a group consisting exclusively of cells and a group with only Al2O3 powders were used as blank controls and negative controls. The error bar represents ± SD (n = 6); *p < 0.05 and **p < 0.01 compared with the positive control group