Abstract
The aim of this study was to analyse the damage to the oxide layer: passive and nanotubular, covering screws made of titanium alloy Ti6Al4V ELI after implantation. Self-cutting cervical screws were modified by anodizing in an electrolyte solution of ethylene glycol with the addition of 1% DI water and 0.6% wt. NH4F . The microscopic and electrochemical analyses were performed by scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS), and open circuit potential (OCP) measurements before and after screw implantation into pig cervical vertebrae. Obtained results confirm the possibility of nanotubular oxide layer (TNT) formation on Ti6Al4V ELI screws and no significant damage due to implantation was observed for the nanotubular oxide layer.
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