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Endothelial cell density increased on fine grain NiTi substrates with greater sub-micron to nanometer surface features after 1 day. The difference in the number of endothelial cells between fine and coarse grain NiTi substrates was significant, *p < 0.01. However, there was no significant difference in endothelial cell density between fine grain NiTi and c.p. Ti. Data = mean +/− S.E.; N = 3. Control = tissue culture polystyrene.
