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Morphology of adherent osteoblasts on differently treated Ti surfaces. Scanning electron microscopy (SEM) of MC3T3-E1 cells cultured on (A) Ti, (B) FN-Ti, (C) GRGDSP-Ti, (D) PHSRN-Ti, and (E) GRGDSP/PHSRN-Ti for 2 days. Attached cells show cytoplasmic extensions, presumed to be microvilli (large arrows) and filopodia-like structures (thin arrows).
