Scanning Electron microscopy of cells co-cultured with alloy specimens at different time point.

<p>(A) After the cells had been inoculated for 3 hours, rabbit bone marrow mesenchymal stem cells which were regular elongated-spindly shaped adhered to the surface of the alloy with 70% porosity. (B) After 24 hours, pseudopodia-like protrusions of the cells appeared, interrelated between each other with the cells tightly attached to the surface of the alloy with 70% porosity. (C–D) After 72 hours inoculated, cells began growing to the inside pores of the alloys with 70% porosity (C) and 40% porosity (D). (E–F) The cells were growing from the edge to inside of pores of the 70% porosity group in which extracellular matrix also could be seen.