Performance of PEO/Polymer Coatings on the Biodegradability, Antibacterial Effect and Biocompatibility of Mg-Based Materials.

Magnesium (Mg) alloys have recently attracted attention in biomedicine as biodegradable materials with non-toxic degradable products. Such compounds have become a frontier in the study of biodegradable materials because of their remarkable biomechanical compatibility and superior biocompatibility. The use of Mg-based implants reduces the negative consequences of permanent biological implants by eliminating the necessity for biomaterial surgery following the healing process.

Tailoring the biological response of zirconium implants using zirconia bioceramic coatings: A systematic review.

Background: The poor biological performance of zirconium implants in the human body resulting from their bio-inertness and vulnerability to corrosion and bacterial activity reflects the need for further studies on substitution or performing the surface modification. The suggestion of employing zirconia (ZrO) bioceramic coatings for surface modification seems beneficial.

Objectives: This systematic review aims to identify and summarize existing documents reporting the biological responses for ZrO coatings produced by the PEO process on zirconium implants.

On the passive and semiconducting behavior of severely deformed pure titanium in Ringer's physiological solution at 37°C: A trial of the point defect model.

The effects of sever plastic deformation through multi-pass accumulative roll bonding on the passive and semiconducting behavior of pure titanium is evaluated in Ringer's physiological solution at 37°C in the present paper. Produced results by polarization plots and electrochemical impedance spectroscopy measurements revealed a significant advance in the passive response of the nano-grained sample compared to that of the annealed pure titanium. Also, Mott-Schottky test results of the nano-grained pure titanium represented a lower donor density and reduced flat-band potential in the formed passive film in comparison with the annealed sample.

The role of grain refinement and film formation potential on the electrochemical behavior of commercial pure titanium in Hank's physiological solution.

In this study, the electrochemical behavior and semiconducting properties of the passive film formed on the nano-grained commercial pure titanium (CP-Ti), successfully made by seven-cycle accumulative roll bonding process, were compared to those for annealed CP-Ti in Hank's physiological solution at 37°C. Polarization plots and electrochemical impedance spectroscopy measurements revealed that the passive behavior of the nano-grained sample was significantly improved in comparison with that of annealed CP-Ti. Mott-Schottky analysis showed that the passive film formed on the nano-grained CP-Ti had a lower donor density and reduced flat-band potential than annealed sample.

Effect of immersion time on the passive and electrochemical response of annealed and nano-grained commercial pure titanium in Ringer's physiological solution at 37°C.

In the present study, various electrochemical tests were used to investigate the passive and electrochemical response of annealed and nano-grained commercial pure Titanium in Ringer's physiological solution at 37°C. Nano-grained pure Titanium, which typically has an average grain size of 90±5nm, was obtained by six-cycle accumulative roll bonding process. Polarization and electrochemical impedance spectroscopy plots illustrated that as a result of grain refinement process, the passive response of the nano-grained sample was improved compared to that of its coarse-grained counterpart in Ringer's physiological solution.