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Confocal images of MC3T3-E1 cells 24 h after being seeded onto titanium (Ti) or zirconia (Zr) discs. (A) Titanium-machined, (B) titanium-anodized, (C) sandblasted (Y, Nb)-TZP, (D) hydroxyapatite (HA)-coated (Y, Nb)-TZP, (E) sandblasted (Y, Ta)-TZP, and (F) HA-coated (Y, Ta)-TZP. Original magnification is 300×; bar = 50 µm.
