SUMMARY
The investigations leading to define the degree of bacteria adhesion to modified surfaces of prosthodontic alloy Co-Cr-Mo were presented in the paper. The study was made on the WIRONIT alloy, the surface of which was covered with titanium nitride TiN and titanium nitrocarbide Ti(CN) coatings. The latter was applied in two composition variations – 15% by weight and 4% of weight. The samples were placed for 24 hours in bacterial medium and then observed under a scanning electron microscope, where the number of bacteria present on samples surface were determined. The obtained results showed, that the smallest number of bacteria colonised surfaces covered with titanium nitride and the greatest number of bacteria were observed on the control sample i.e. the alloy without any covering layer. The titanium nitrocarbide layers showed the medium colonisation degree by bacteria. Moreover, it was visible, that the more carbon in the layer, the more bacteria on the surface were present.
Key words
Prosthodontic alloys, titanium nitride, titanium nitrocarbide, adhesion of bacteria.
1 Politechnika Łódzka
