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.

Validation of Microbial Recovery of Pharmaceutically Important Gram-negative Bacteria from Peroxygen/Silver based Disinfectants and Evaluation of their Degree of Corrosiveness

“…andmc fin. , respectively 26 . The test was accelerated by using easily corroded steel material of density approximately 7.6 g/cm 3 and challenged by the maximum working concentration of disinfectant solutions of 5 % (v/v) and purified water USP as control vehicle.…”

“…If there were suspect results within the groups, One-way ANOVA was performed on Log 10 transformed results to confirm significance followed by Dunnett's Multiple Comparison Test which was used to confirm success or failure of the test and Tukey's Multiple Comparison Test to compare between individual groups at α <0.001. The gravimetric corrosion test calculations were carried on according to the method described by Vasilescu et al 26 . The weight loss (Δm, mg), the corrosion rate (K Corr , mg.cm H2 .…”

“…According to the penetration index stability of the metal coupons against the liquid tested materials used in this study and the degree of corrosion could be determinedas detailed by some researchers 26 . Finally, all statistical analysis was performed using GraphPad Prism version 5.00.288 for the corrosion test and version 6.01 for the microbial recovery test.…”

Development, Microstructure and Corrosion Resistance of Al-Mg-(Si) Binary and Ternary System Samples in 5.3% NaCl Solution for Applications with Environmental Impact

“…These types of materials include aluminum alloys, titanium alloys or composite materials that ensure reduction of fuel consumption and implicit gas emissions into the atmosphere [1][2][3][4][5]. Among these, Al-Mg alloys have low density (about three times lighter than cast iron or copper alloys) [1,2,[6][7][8][9], high mechanical strength and good corrosion resistance, which are due to the formation of a protective oxide layer [10][11][12]. Increasing Mg content increases corrosion resistance alloy in special in sea water and weak alkaline solutions.…”

Studies Concerning the Usage of the Intrinsic Morphological and Chemical Features of Some Common and Document Paper Types as Security Items

“…SEM is the most appropriate technique for the observation of the morphological features at different magnifications while EDS provides the local elemental composition which can be another valuable intrinsic mark. The EDS analysis is carried out on an area of few square micrometers in size therefore, the EDS results are prone to significant uncertainties due to the intrinsic heterogeneity of the paper [20][21][22][23][24][25]. To bypass this issue, the X-ray fluorescence spectroscopy (XRFS) has to be used as it collect data on an area of about 20 cm 2 and provides a representative average composition of the paper [26].…”