Antibacterial Activity and Bioactivity of Zn-Doped TiO2 Coating for Implants

Lacking osseointegration and peri-implantitis induced by bacterial infiltration are the pivotal issues for the long-term clinical success of implants. In order to improve the bioactivity and antibacterial properties of implant materials, volcano-shaped microporous TiO2 coatings doped with Zinc (Zn) were fabricated via a micro-arc oxidation (MAO) method on pure titanium (Ti). The microstructure, morphology, and chemical composition of the Zn-doped coatings were systematically studied. In cell culture tests, the formed coatings promoted the adhesion and proliferation of bone mesenchymal stem cells (BMSCs), exhibiting good biocompatibility. The antibacterial experiments revealed that Zn-TiO2 coatings possess excellent antibacterial properties against Staphylococcus aureus (S. aureus) and Porphyromonas gingivalis (P. gingivalis).