The Photoactivity and Electrochemical Behavior of Porous Titania (TiO2) in Simulated Saliva for Dental Implant Application

• Published in: SILICON 2019-10, Vol.11 (5), p.2353-2363
• Main Authors: Fathi, A. M., Shehata, O. S., Abdel-Karim, A. M.
• Format: Article
• Language: English
• Subjects: Adsorption; Biomedical materials; Calcium ions; Chemistry; Chemistry and Materials Science; Corrosion rate; Dental implants; Dental materials; Electrochemical analysis; Electrochemical impedance spectroscopy; Electrode polarization; Electron diffraction; Environmental Chemistry; Fluorides; Inorganic Chemistry; Lasers; Materials Science; Optical Devices; Optics; Original Paper; Oxide coatings; Photonics; Polymer Sciences; Rhodamine 6G; Saliva; Surface chemistry; Titanium base alloys; Titanium dioxide
• ISSN: 1876-990X; 1876-9918
• DOI: 10.1007/s12633-018-9813-4

Titanium and its alloys are considered one of the most important biomaterials that have been used. The existence of TiO 2 on the surface increases the adsorption of bio-compatible calcium and phosphate ions. So, this article deals with the formation of porous titania, TiO 2 , film on Ti implant, to give a comprehensive account of using it as a photoactive biomaterial in simulated saliva solution of different pH values (7.4 and 5.4) and with various concentrations of fluoride ions. Different techniques such as polarization, electrochemical impedance spectroscopy (EIS), photochemical measurements and electron diffraction X-ray, EDX were used. The oxide layer and the adsorbed layer were discovered by the scanning electron microscopy, SEM. The film appearances under various environments and the adsorption of Ca 2+ and PO 4 3 − were described. The fitted impedance data assisted in explaining the oxide film nature and the adsorption phenomena occurred on its surface. The results have shown that the existence of oxide layer on the Ti implant decreases the corrosion rate of the implant in the corrosive fluoride ion media as compared to the non-anodized implant. The photoactivity of dental implants was recognized and the performance of the oxide film increases after 2 h of UV- illumination which is proved by the improvement of Rhodamine 6G decomposition.