Internal structure (phases and solubility atoms) for Ni63Cr24.6Mo10.77Si1.50Mn0.03C0.01 alloy is changed after aging (stored) in saliva for a different time. Vickers hardness, maximum shear stress (m) and roughness parameters values for Ni-Cr based alloy are increased after aging in saliva. Microbiological investigation shows the Candida spp. stuck on the surface of Ni-Cr based dental alloy which reached the maximum value at four weeks. That is meant the growth of it dependent on aging time.
Abu Bakr El-Bediwi and Thoraya El-Helaly