Bioactive Coating on Titanium Dental Implants for Improved Anticorrosion Protection: A Combined Experimental and Theoretical Study

Katić, Jozefina; Šarić, Ankica; Despotović, Ines; Matijaković, Nives; Petković, Marin; Petrović, Željka (2019) Bioactive Coating on Titanium Dental Implants for Improved Anticorrosion Protection: A Combined Experimental and Theoretical Study. Coatings, 9 (10). ISSN 2079-6412

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Abstract

In recent years, extensive studies have been continuously undertaken on the design of bioactive and biomimetic dental implant surfaces due to the need for improvement of the implant–bone interface properties. In this paper, the titanium dental implant surface was modified by bioactive vitamin D3 molecules by a self-assembly process in order to form an improved anticorrosion coating. Surface characterization of the modified implant was performed by field emission scanning electron microscopy (FE-SEM), attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), and contact angle measurements (CA). The implant’s electrochemical stability during exposure to an artificial saliva solution was monitored in situ by electrochemical impedance spectroscopy (EIS). The experimental results obtained were corroborated by means of quantum chemical calculations at the density functional theory level (DFT). The formation mechanism of the coating onto the titanium implant surface was proposed. During a prolonged immersion period, the bioactive coating effectively prevented a corrosive attack on the underlying titanium (polarization resistance in order of 107 Ω cm2) with ~95% protection effectiveness.

Item Type:	Article
Additional Information:	Rad je objavljen u specijalnom broju "Anticorrosion Protection of Nonmetallic and Metallic Coatings".
Uncontrolled Keywords:	titanium dental implant ; vitamin D3 ; bioactive coating ; anticorrosion protection ; electrochemical impedance spectroscopy (EIS) ; density functional theory level (DFT)
Subjects:	NATURAL SCIENCES > Chemistry NATURAL SCIENCES > Chemistry > Applied Chemistry
Divisions:	Division of Materials Chemistry Division of Materials Physics Division of Physical Chemistry
Depositing User:	Željka Petrović
Date Deposited:	27 Sep 2019 10:51
URI:	http://fulir.irb.hr/id/eprint/5013
DOI:	10.3390/coatings9100612

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