Journal ArticleDOI
MWCNT reinforced bone like calcium phosphate—Hydroxyapatite composite coating developed through pulsed electrodeposition with varying amount of apatite phase and crystallinity to promote superior osteoconduction, cytocompatibility and corrosion protection performance compared to bare metallic implant surface
Rajib Chakraborty,Venkata Sundeep Seesala,Mainak Sen,Srijan Sengupta,Santanu Dhara,Partha Saha,Karabi Das,Siddhartha Das +7 more
TLDR
In this article, a composite coating of hydroxyapatite, calcium hydrogen phosphate and MWCNT was developed on SS316 surface with varying amount of calcium phosphate-hydroxy apatite phase and crystallinity by pulsed electrodeposition.Abstract:
Inconsistent growth of tissues and poor osteoconduction performance on the metallic implant surfaces due to variation of surface energy are major contributing factors for failure of most metallic implant on account of lack of stronger attachment with surrounding bone or tissues. In this study, composite coating of hydroxyapatite, calcium hydrogen phosphate and MWCNT was developed on SS316 surface with varying amount of calcium phosphate-hydroxyapatite phase and crystallinity by pulsed electrodeposition. TEM study revealed that the MWCNTs were bonded strongly with the in situ deposition phases and thus act as reinforcement in the deposited coating similar to the collagen fiber in natural bone structure. Presence of MWCNT reinforcement increased the overall coating modulus of elasticity in the range of 6–10 GPa similar to that of natural bone. Different coating surfaces with varied amount of phase and crystallinity exhibits altogether different phenomena and growth geometry of apatite formation during osteoconduction period under contact with SBF. Coatings with highest amount of hydroxyapatite phase exhibit formation of porous spherical (~ 1 μm) and rod like (~ 600 nm) scaffold structure along with presence of nanopores (~ 100 nm) all along the contact surfaces. Cell proliferation study indicated uniform and fast spreading of cells over the coating surfaces as compared to bare metallic implant. EIS study illustrated five times high corrosion resistance capability along with formation of passivation layer under contact with SBF for coating comes with 66% of hydroxyapatite phase.read more
Citations
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Journal ArticleDOI
Recent advances in multifunctional hydroxyapatite coating by electrochemical deposition
Ting-Ting Li,Lei Ling,Mei-Chen Lin,Mei-Chen Lin,Hao-Kai Peng,Hai-Tao Ren,Ching-Wen Lou,Jia-Horng Lin +7 more
TL;DR: In this article, the critical factors and mechanisms of HA coating using the electrochemical deposition method are comprehensively evaluated, thereby examining the effects of parameter optimization (i.e., current mode, ultrasonic treatment, and postprocessing).
Journal ArticleDOI
Electrodeposited Hydroxyapatite-Based Biocoatings: Recent Progress and Future Challenges
TL;DR: A detailed overview of dry and wet coating methods is given in this paper, where the mechanism of HAp electrodeposition is considered and the effect of operational variables on deposit properties is highlighted.
Journal ArticleDOI
Enhanced antibacterial and corrosion resistance properties of Ag substituted hydroxyapatite/functionalized multiwall carbon nanotube nanocomposite coating on 316L stainless steel for biomedical application
D. Sivaraj,K. Vijayalakshmi +1 more
TL;DR: 3 wt% Ag substituted HA/f-MWCNT coating on passivated 316L SS is nonhemolytic and most suited as a novel alternative to dental and orthopaedic implants.
Journal ArticleDOI
Synthesis and characterization of nickel free titanium–hydroxyapatite composite coating over Nitinol surface through in-situ laser cladding and alloying
TL;DR: In this paper, a high power fiber laser was used to synthesize titanium hydroxyapatite composite coating over biomedical-grade Nitinol surface through laser in-situ formation, cladding and alloying processes.
Journal ArticleDOI
A comparative study on surface morphology and electrochemical behaviour of hydroxyapatite-calcium hydrogen phosphate composite coating synthesized in-situ through electro chemical process under various deposition conditions
Rajib Chakraborty,Partha Saha +1 more
TL;DR: In this paper, the surface morphology and electrochemical corrosion resistance behavior with respect to various depositions kinetics and nucleation mechanism achieved with the help of variable current density, voltage and time.
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