Figure 2.

The number of living cells attached to different surface-treated titanium, zirconia and BioHPP, after 2, 24 and 48 h. The number of living cells attached to controls and surface treated titanium (A,B), zirconia (C,D) and BioHPP (E,F) was counted after 2, 24 and 48 h of incubation using live–dead staining. After 2 h of incubation, only a small number of cells adhered to the surfaces of the three materials in the control groups. During 48 h of incubation, the number of cells increased steadily. Generally, compared to controls, a significantly larger number of cells attached after oxygen plasma of UV light treatment on all disks and, additionally, after argon plasma treatment on BioHPP disks. For better visualization, results are shown in percent of 2 h negative controls ± standard deviation, * p < 0.05.