Hydroxyapatite-titanium dioxide (HAp-TiO2) nanohybrid composite was coated on Ti-6Al-4V and Ti- 13Nb-13Zr substrates by electrophoretic deposition. Coating surface characteristics and biocompatibility were analysed using X-ray photoelectron spectroscopy, water contact measurement, scanning electron microscopy and fluorescence microscopy. The results indicated high degree of crystallinity and densely packed crack free morphology of the coating. The coated substrates displayed lower contact angle (Ti-13Nb-13Zr, 17·4°; Ti-6Al-4V, 22·2°) than the controls (Ti-13Nb-13Zr, 80·8°; Ti-6Al- 4V, 72·6°). The cytocompatibility of the coated substrates was determined by staining the human dermal fibroblast cells with 49, 6-diamidino-2-phenylindole and imaging under fluorescent microscope. Both SEM and florescence microscope images showed comparatively enhanced cell adhesion on coated Ti-13Nb-13Zr and Ti-6Al-4V than the uncoated substrates. This difference could be attributed because of the higher wettability of Ti-13Nb-13Zr. Hence, this study provides evidence that the coating provided a better surface property for adhesion of human dermal fibroblast cells. © 2014 W. S. Maney &amp; Son Ltd.

Geetha M

Department of Control and Automation

School of Electrical Engineering

Vellore Campus

Bhawanjali S

Revathi A

Popat K.C

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Surface modification of Ti–13Nb–13Zr and Ti–6Al–4V using electrophoretic deposition (EPD) for enhanced cellular interaction

Materials Technology

This paper reports on the corrosion and scratch behavior of TiO 2 + 50%HAp nanoceramic coated Ti-13Nb-13Zr orthopedic implant alloy. An adherent thin coating was obtained using the electrophoretic deposition (EPD) technique at 30 V and sintering at 850 °C. The microstructure of the coated surfaces was characterized by optical microscopy, AFM, and SEM, and the composition of the coating was examined using EDAX. The functional groups and formed phases analyzed using FT-IR, and XRD. Further, the adhesion strength of the coatings was evaluated using scratch tester and the corrosion behavior of all samples was tested in Simulated Body Fluid (SBF-Hank's solution) using a potentiodynamic polarization studies. The sintered coating exhibited higher adhesion, lower porosity and higher density compared to unsintered samples, and higher corrosion resistance compared to the substrate. However, the corrosion resistance of the unsintered coating was superior to that of the sintered one due to the presence of minimal interconnected porosity. © 2011 Elsevier Ltd and Techna Group S.r.l.

Ceramics International

Electrophoretic deposition of nanocomposite (HAp+TiO2) on titanium alloy for biomedical applications

Journal of Applied Electrochemistry

Synthesis and characterization of calcium phosphate coatings on Nitinol

Biomaterials

The future of biologic coatings for orthopaedic implants

Titania/hydroxyapatite bi-layer coating on Ti metal by electrophoretic deposition: Characterization and corrosion studies

Microwave (MW) processing has been studied as an alternative method of hydroxyapatite (HA) based composite coatings on commercially pure titanium (CPTi) to enhance the bioactivity for orthopaedic and dental implant applications. The coating was formed by processing CPTi metal packed in HA and at 800 W microwave power for 22 min. The composition of the coating was found to be TiO2 (rutile) as major phase along with HA as minor phase. The MW absorption of non-stoichiometric TiO2 layer, which was grown during the initial hybrid heating, resulted in sintering of apatite particles interfacing them. The non-stoichiometric nature of TiO2 was evident from the observed mid-gap bands in ultraviolet-visible diffusive reflectance (UV-VIS-DR) spectrum. The lamellar α structure of the substrate suggests that the processing temperature was above β transus of CPTi (1155 K). The oxygen stabilized α phase whose thickness increased with microwave processing time, was likely to be the reason for the increase in Young's Modulus and hardness of the substrate. The coating induced apatite precipitation in bioactivity test. The osteoblast cell adhesion test demonstrated cell spreading which is considered favourable for cell proliferation and differentiation. Thus, in situ composite coating of titania and HA on CPTi was obtained by a simple one-step process. © 2009 Elsevier B.V. All rights reserved.

Surface and Coatings Technology

In situ composite coating of titania-hydroxyapatite on commercially pure titanium by microwave processing

Journal	Materials Technology
Publisher	Informa UK Limited
ISSN	1066-7857
Open Access	0