Cytotoxicity of biphasic scaffolds.

<p>MTT assay of proliferation of NP cells cultured with different concentrations of scaffold extracts. The proliferation rate of cells cultured with DMSO was significantly lower than those of the other groups (P<0.05). However, there was no significant difference in cell proliferation among cells cultured with control medium and different concentrations of scaffold extracts at the same culture time (P>0.05). * = p<0.05 compared to cells cultured with DMSO.