Effects of plasma nitriding and multiple arc ion plating TiN coating on bacterial adhesion of commercial pure titanium via in vitro investigations

The invalidation of dental implant is mainly caused by periimplantitis, which is closely related to the bacterial adhesion on the surface of material. In order to prevent it from bacteria adhesion, two kinds of nitride modification coatings were synthesized on the dental implant materials of commercial pure titanium via plasma nitriding and multiple arc ion plating techniques, respectively. The effects of plasma nitriding and TiN coating plating on bacterial adhesion of commercial pure titanium were assessed by using in vitro investigations. The results showed that there were a large amount of bacteria attached on the commercial pure titanium surface, while few bacteria adhered to the surfaces of two modification coatings. The nitriding coating accounted for about 57.40% and the TiN coating made up nearly 62.45% of the bacterial adhesion amount on that of commercial pure titanium. Modification coatings obtained by plasma nitriding and multiple arc ion plating TiN significantly reduced the bacterial adhesion. Both the nitriding coating and TiN coating possessed certain properties of antibacterial adhesion. There is no significant difference between the two modification coatings on the resistance of bacterial adhesion from a statistical point of view.