Microbial adherence to a nonprecious alloy after plasma nitriding process

To investigate the microbial adherence to the surfaces of a nonprecious metal alloy after plasma nitriding.The plasma-nitriding process was performed to the surfaces of metals prepared from a nickel-chromium alloy. The microorganisms were labeled with technetium-99m. After the labeling procedure, 60 metal disks were treated with a microorganism for each use.The results revealed that the amount of adherence of all microorganisms on surfaces was changed by plasma-nitriding process; adherence decreased substantially (P.05) and the differences in plasma nitriding time were not significant (P.05)With the plasma-nitriding process, the surface properties of nonprecious metal alloys can be changed, leading to decreased microbial adherence.