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Physico-chemical and biological evaluation of doxycycline loaded into hybrid oxide-polymer layer on Ti-Mo alloy.

Authors :
Kazek-Kęsik A
Nosol A
Płonka J
Śmiga-Matuszowicz M
Student S
Brzychczy-Włoch M
Krok-Borkowicz M
Pamuła E
Simka W
Source :
Bioactive materials [Bioact Mater] 2020 Apr 25; Vol. 5 (3), pp. 553-563. Date of Electronic Publication: 2020 Apr 25 (Print Publication: 2020).
Publication Year :
2020

Abstract

Oxide-polymer coatings were formed on the surface of the vanadium-free Ti-15Mo titanium alloy. The Ti alloy surface was modified by the plasma electrolytic oxidation process, and then, the polymer layer of a poly (D, l-lactide- co -glycolide) with doxycycline was formed. The polymer evenly covered the porous oxide layer and filled some of the pores. However, the microstructure of the polymer surface was completely different from that of the PEO layer. The surface morphology, roughness and microstructure of the polymer layer were examined by scanning electron microscopy (SEM) and a confocal microscope. The results confirmed the effectiveness of polymer and doxycycline deposition in their stable chemical forms. The drug analysis was performed by high-performance liquid chromatography. The <superscript>1</superscript> H NMR technique was used to monitor the course of hydrolytic degradation of PLGA. It was shown that the PLGA layer is hydrolysed within a few weeks, and the polyglycolidyl part of the copolymer is hydrolysed to glycolic acid as first and much faster than the polylactide one to lactic acid. This paper presents influence of different microstructures on the biological properties of modified titanium alloys. Cytocompatibility and bacterial adhesion tests were evaluated using osteoblast-like MG-63 cells and using the reference S. aureus and S. epidermidis strains. The results showed that the optimum concentration of doxycycline was found to inhibit the growth of the bacteria and that the layer is still cytocompatible.<br />Competing Interests: None.<br /> (© 2020 Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.)

Details

Language :
English
ISSN :
2452-199X
Volume :
5
Issue :
3
Database :
MEDLINE
Journal :
Bioactive materials
Publication Type :
Academic Journal
Accession number :
32373761
Full Text :
https://doi.org/10.1016/j.bioactmat.2020.04.009