Contributions Regarding the Influence of the Antibacterial Chemical Deposits on the Surface of the Oral Implant of the Ti10Zr Bio-alloy on Its Behaviour During Use

Abstract

The antioxidant and disinfectant properties of silver have been known for a long time, but explaining its antibacterial mechanism was only possible through the modern methods of investigation and analysis, such as radioactive isotopes and the electron microscopy. The effective forms of silver that determine the microbial inhibition are the silver salts, and the optimal antimicrobial effect is obtained by releasing continuously a moderate amount of silver ions. On the other hand, many studies show that the size and shape of the silver nanoparticles play a key role in their antibacterial activity. The paper presents some results of the research regarding the chemical deposition of the metallic silver with antibacterial role on the oral implant of the Ti10Zr bio-alloy. The research was conducted in the Chemistry Laboratory of the Sciences and Environment Faculty from the Lower Danube University of Galati. To establish the optimum chemical deposition conditions of the metallic silver we used several experimental regimes in different conditions of experimentation. The paper presents the experimental results obtained when introducing the implants to be covered in the Tollens�s reagent following the influence of the hold time in the solution on the character of the deposition, on the dispersion, on the deposition uniformity and on particle size deposited. To cover chemically with metallic Ag we used solutions prepared with chemically pure reagents and bidistilled water under experimental regimes of chemical deposition. Electron microscopy analyses with electron scanning (SEM) and the EDX elemental analysis revealed the presence of the silver on the surface of implants, the degree of dispersion and the morphology of silver particles deposited according to the experimental regimes.