(a)
(b)
(c)
(d)
Figure 8: SEM morphology of MC3T3-E1 cells cultured on each sample after 2 hours (scale bar of (a–d) = 2 μm). Red arrows point out the position of cells. SLM (a), MAO (b), 1 mM-Zn (c), and 100 μM-Zn (d).