Ca\P-Containing Coatings Formed on Ti by Plasma Electrolytic Treatment

In the course of presented study, calcium phosphate coatings were formed on a mesh titanium endoprosthesis by plasma electrolytic oxidation (PEO). By scanning electron microscopy, it was established that the resulting coatings have a developed morphology with a significant number of ports. Such a coating structure may be favorable for cell adhesion. According to the data of XRD analysis, the obtained coatings contain α-Ca3(PO4)2 formed by plasma-chemical synthesis on the surface layer. The presence this compound significantly increases the affinity of the implant for bone tissue. This, in turn, could help to reduce the patient's recovery time, as well as reduce the likelihood of implant failure. Additionally, by atomic absorption spectroscopy, it was found that for the samples with PEO coatings after immersion in simulated body fluid the calcium concentration decreases compared to the initial value, which is explained by calcium sorption on the PEO-coating. In addition, this also confirms the biocompatibility of the resulting surface layer.