Electrophoretic deposition of nanocrystalline hydroxyapatite on Ti6Al4V/TiO2 substrate

Jain, Prateek; Mandal, Tapendu; Prakash, Prem; Garg, Ashish; Balani, Kantesh

doi:10.1007/s11998-012-9438-2

Cited by 16 publications

(11 citation statements)

References 38 publications

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“…Both optical microscopic and SEM image clearly reveals the presence of oxide smooth scales throughout the surface without spallation. Obviously, the duration of oxidation is considerably high to achieve a good surface coverage with the oxide scale and this agrees with other findings (11) . Pores are also evident throughout the surface,this microstructural inhomogenities might be generated during the growth of oxide islands and their orientation on the surface, where thermal oxidation would lead to an increase in surface roughness of the oxide film due to the differential oxidation rate of individual grains of the polycrystalline Alloy.…”

Section: The Surface Morphology Of Thermally Oxidized Samplesupporting

confidence: 92%

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The Effect of Pores in Dual Nano Hydroxyapatite Coating on Thermally Oxidized Commercial Pure Titanium : Mechanical and Histological Evaluation

Mahmood¹

2016

JBCD

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Background:In this study,TiO2 layer was thermally grown as a diffusion barrier on CP Ti substrate prior to electrophoretic deposition of HA coatings, to improve the coating's compatibility also macro and micro pores in nano Hydroxyapatite dual coatings were created and their effect on the bond strength between the bone and implant was evaluated. Materials and methods: Electrophoretic Deposition technique (EPD) was used to obtain coatings for each one of four types of Hydroxyapatite(HA)on CP Ti screws (micro HA, nano HA, dual nano HA with micro pores, dual nano HA with macro pores) where carbon particles used as fugitive material to be removed by thermal treatment to create porosity.For examination of the changes occurred on the substrate, SEM, SPM and XRD used, coatings characterized by XRD, SEM and interfacial shear strength measurements. Results:The results mentioned the formation of rutilenano TiO2 with, SEM showed that the size of pores in HA coatings corresponded to the size of carbon particles. Statistical analysis of the removal torque tests showed highest means of the single nano HA coating at 2 and 4 weeks implantation intervals. Histological analysisrevealed a faster reaction of bone and higher osteoblasts activity towards thermally oxidized CP Ti implants coated with single nano HA coating. Conclusion:Carbon particles as a fugitive material within nano HA coat produced porosity.Presence of pores 1µ in nano HA coats did not achieve highest removal torque values nor highest osteoblasts activity in 2 and 4 weeks implantation intervals.

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Section: The Surface Morphology Of Thermally Oxidized Samplesupporting

confidence: 92%

“…1. Substrate Thermal Oxidization: Mirror polished Cp Ti substrates were ultrasonicated in water bath for 30 min, followed by acetone wash (10) then were heated at 650⁰C for 8h in oven (11) .…”

Section: In Vitromentioning

confidence: 99%

The Effect of Pores in Dual Nano Hydroxyapatite Coating on Thermally Oxidized Commercial Pure Titanium : Mechanical and Histological Evaluation

Mahmood¹

2016

JBCD

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“…This is possibly related to the surface characteristics, such as surface topography, and the chemistry of the HA-coated layer. Therefore, it seems that the alkaline post-treatment creates a highly hydrophilic surface which plays a major role in tissue-implant interaction [31], early osseo-integration [15] and also bone formation [8].…”

Section: Contact Angle Measurementmentioning

confidence: 99%

“…Although there are many methods, such as pulsed laser deposition [12], plasma spray [13], solgel [14] and electrophoretic deposition (EPD) [7,[15][16][17], available to coat HA on metallic substrates, there are only two post-treatment methods that are commercially used: sintering posttreatment [15][16][17] and alkaline post-treatment [18][19][20]. Simple equipment, rapid formation and high efficiency have made EPD a preferable method for the coating of HA on biomaterials, such as stainless steel and titanium.…”

Section: Introductionmentioning

confidence: 99%

Effect of Post-Treatment Techniques on Corrosion and Wettability of Hydroxyapatite-Coated Co–Cr–Mo Alloy

et al. 2015

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This study is a comparison between the effect of sintering and alkaline post-treatment techniques on calcium phosphate-coated Co-Cr-Mo alloy in terms of electrochemical corrosion behavior and wettability. The Co-Cr-Mo substrates were electrophoretically coated by calcium phosphate in a solution of Ca(NO 3 ) · 4H 2 O and NH 4 H 2 PO 4 . The sintering and alkaline post-treatment techniques were then conducted to convert an as-deposited dicalcium phosphate dihydrate phase to crystalline hydroxyapatite (HA). The coated layers were characterized in terms of phase, crystallinity and composition using X-ray diffraction, Fourier transform infrared spectroscopy and energy-dispersive spectroscopy. In addition, morphology and thickness of coated layers were evaluated using a scanning electron microscope. The results indicate HA-coated samples with a sintering post-treatment technique exhibit more improvement in corrosion parameters, such as corrosion potential (E corr ) and corrosion current density (I corr ), but lower enhancement in hydrophilicity. However, the HA-coated samples with an alkaline posttreatment technique reveal higher hydrophilicity with lower improvement in corrosion resistance.

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“…3,[5][6][7][8] Several other methods such as plasma spraying, dip and spin coating, sol-gel, ion-beam sputtering and electrophoretic deposition have been employed to deposit HA coatings. 1,[9][10][11][12][13] Among them, plasma spraying has found much more industrial acceptance and has, therefore, been investigated intensively. 1,[14][15][16] In order to retain structural integrity, HA coatings need to be crystalline in nature.…”

Section: Introductionmentioning

confidence: 99%

Crack Propagation Resistance of α-Al2O3 Reinforced Pulsed Laser-Deposited Hydroxyapatite Coating on 316 Stainless Steel

Bajpai

Gupta

Pradhan

et al. 2014

JOM

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Hydroxyapatite (HA) is a widely used bioceramic known for its chemical similarity with that of bone and teeth (Ca/P ratio of 1.67). But, owing to its extreme brittleness, a-Al 2 O 3 is reinforced with HA and processed as a coating via pulsed laser deposition (PLD). Reinforcement of a-Al 2 O 3 (50 wt.%) in HA via PLD on 316L steel substrate has shown modulus increase by 4% and hardness increase by 78%, and an improved adhesion strength of 14.2 N (improvement by 118%). Micro-scratching has shown an increase in the coefficient-of-friction from 0.05 (pure HA) to 0.17 (with 50 wt.% Al 2 O 3 ) with enhancement in the crack propagation resistance (CPR) up to 4.5 times. Strong adherence of PLD HA-Al 2 O 3 coatings ($4.5 times than that of HA coating) is attributed to efficient release of stored tensile strain energy ($17 9 10 À3 J/m 2 ) in HA-Al 2 O 3 composites, making it a potential damagetolerant bone-replacement surface coating.

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Electrophoretic deposition of nanocrystalline hydroxyapatite on Ti6Al4V/TiO2 substrate

Cited by 16 publications

References 38 publications

The Effect of Pores in Dual Nano Hydroxyapatite Coating on Thermally Oxidized Commercial Pure Titanium : Mechanical and Histological Evaluation

The Effect of Pores in Dual Nano Hydroxyapatite Coating on Thermally Oxidized Commercial Pure Titanium : Mechanical and Histological Evaluation

Effect of Post-Treatment Techniques on Corrosion and Wettability of Hydroxyapatite-Coated Co–Cr–Mo Alloy

Crack Propagation Resistance of α-Al2O3 Reinforced Pulsed Laser-Deposited Hydroxyapatite Coating on 316 Stainless Steel

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