296727.fig.004a
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296727.fig.004b
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Figure 4: Visualization of cell viability on uncoated zirconia after 6 days by fluorescence microscope. High viability of the Saos-2 cells on uncoated zirconia is indicated. The green colored cells (calcein AM) indicate viable cells, and the red colored cells (ethidium homodimer-1) indicate dead cells.