Hydrothermal synthesis of nanocrystalline hydroxyapatite–graphene nanosheet on Ti-6Al-7Nb: mechanical and in vitro corrosion performance

Yiğit, Oktay; Dikici, Burak; Özdemir, Niyazi

doi:10.1007/s10856-021-06514-w

Cited by 12 publications

(5 citation statements)

References 56 publications

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“…The peaks at 873.26 and 410 (weak) cm -1 correspond to P − O symmetric stretching. All the spectrum stretching modes for OH − , CO 3 2− and PO 4 3− groups succinctly conform with previous results [39], hence indicating that HAp has carbonated-apatite structure.…”

Section: Ftir Analysis Of Hapsupporting

confidence: 90%

“…The phase of the crystal-synthesized was most of Ca2P2O7 (β-TCP) with diffraction peaks of HAp. The peaks observed at 2θ values of 27.53 and 31.83 o were in accordance with that of bulk HAp crystals (Joint Committee on Powder Diffraction Standards (JCPDS) card number: 9-432), confirmed exactly to the previous bone-derived HAp XRD image [39]. [41].…”

Section: Xrd Analysis Of Hapsupporting

confidence: 85%

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Electrophoretic Deposition of Nanohydroxyapatite on Homogenized Magnesium Based Alloy for Biomedical Applications

Sadiq,

Sudin,

Alsakkaf

et al. 2023

JBBBE

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Magnesium (Mg) alloys are promising biodegradable implant materials. If successful, they do not require second surgical operation for their removal. However, the focus of this study is to address the limitation of fast degradation rate (DR) which hinders the clinical application of Mg alloys. The bio-corrosion rate of any intermetallic alloy is related to its beta (β) phase volume fraction. Thus, homogenization heat treatment (HHT) was carried out to reduce the β phase. The influence of β phase and the hydroxyapatite powders (HAp) was employed to slow down the initial DR of Mg AZ91 alloy. Samples were cut from Mg grade AZ91 alloy ingot in 10mm x 10mm x 3mm dimension. The samples were prepared and divided into two; the first part was classified as as-received sample (sample a) while the second one was processed for HHT. HHT was carried out at 410°C/10h, cooled inside the furnace and named as homogenized sample (sample b). The HAp was synthesized using a simple wet chemical precipitation technique (SWCPT) and deposited on sample b via electrophoretic deposition (EPD) at different voltages with different deposition times. The HAp, uncoated and coated samples were characterized. Potentiodynamic polarization (PP) and immersion tests were carried out in stimulated body fluid (SBF) to estimate the DR and in vitro bioactivity of Mg AZ91 respectively. The results revealed a significant drop in DR from sample a (1.421 mm per year) to coated sample h (3.73 x 10-4 mm per year). Keywords: Magnesium alloy, biodegradable implants, beta phase, homogenization heat treatment, hydroxyapatite, electrophoretic deposition.

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Section: Ftir Analysis Of Hapsupporting

confidence: 90%

Section: Xrd Analysis Of Hapsupporting

confidence: 85%

Electrophoretic Deposition of Nanohydroxyapatite on Homogenized Magnesium Based Alloy for Biomedical Applications

Sadiq,

Sudin,

Alsakkaf

et al. 2023

JBBBE

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“…Plasma spraying is the standard technique used for this purpose [31], but its disadvantages such as the formation of amorphous phases due to high process temperatures, the difficulty of coating geometrically complex metal supports and the costs [32,33] have led to the development of alternative coating methods. Examples include the sol-gel and sol-gel dip coating method [24,34,35], the hydrothermal process [36,37], RF-magnetron sputtering [38], micro-arc oxidation [39], pulsed laser deposition [40], hot isostatic pressing [41], biomimetic deposition [42], highvelocity suspension flame spraying [43], gas detonation deposition [44], electrophoretic deposition [45], and electrochemical deposition [46,47].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Precipitation and Electrodeposition of Hydroxyapatite Coatings at Different Temperatures on Various Metal Substrates

et al. 2022

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The coating of orthopedic and dental implants with hydroxyapatite (HA) is recognized as a method to increase their integration ability. A new metal coating method, comprising simultaneous precipitation and electrodeposition, is presented. Two studies are described: the first is related to the influence of time/temperature increase on the morpho-structural characteristics of the deposited layer on the Ti substrate, while the second study presents the characteristics of the layers deposited on different metal substrates. For comparison, specimens were obtained using the classical electrochemical deposition under the same experimental conditions. The addition of Ca to the electrolyte creates more compact and more uniform coatings, while the addition of P creates more porous layers. Only a very small quantity of crystalline HA deposited on the C55, Cu, and Ni substrates when the classic electrodeposition method was employed, while using the new approach has clearly led to a larger crystalline HA amount electrodeposited on the same types of metals. With some exceptions, the advantages of using the new method are: better crystallinity, more uniform and continuous surface, higher roughness, and potentially higher anti-corrosion capabilities.

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“…However, these porous surfaces lack nano-scale structures. Various micro–nano-structures on titanium implant surfaces by femtosecond laser, plasma spraying, and micro-milling with chemical treatment have previously been constructed . However, for zirconia implants, methods are relatively limited.…”

Section: Resultsmentioning

confidence: 99%

Role and Mechanism of a Micro-/Nano-Structured Porous Zirconia Surface in Regulating the Biological Behavior of Bone Marrow Mesenchymal Stem Cells

Gao¹,

Ding²,

Li³

et al. 2023

ACS Appl. Mater. Interfaces

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Zirconia as a promising dental implant material has attracted much attention in recent years. Improving the bone binding ability of zirconia is critical for clinical applications. Here, we established a distinct micro-/nano-structured porous zirconia through dry-pressing with addition of pore-forming agents followed by hydrofluoric acid etching (POROHF). Porous zirconia without hydrofluoric acid treatment (PORO), sandblasting plus acidetching zirconia, and sintering zirconia surface were applied as controls. After human bone marrow mesenchymal stem cells (hBMSCs) were seeded on these four groups of zirconia specimens, we observed the highest cell affinity and extension on POROHF. In addition, the POROHF surface displayed an improved osteogenic phenotype in contrast to the other groups. Moreover, the POROHF surface facilitated angiogenesis of hBMSCs, as confirmed by optimal stimulation of vascular endothelial growth factor B and angiopoietin 1 (ANGPT1) expression. Most importantly, the POROHF group demonstrated the most obvious bone matrix development in vivo. To investigate further the underlying mechanism, RNA sequencing was employed and critical target genes modulated by POROHF were identified. Taken together, this study established an innovative micro-/nano-structured porous zirconia surface that significantly promoted osteogenesis and investigated the potential underlying mechanism. Our present work will improve the osseointegration of zirconia implants and help further clinical applications.

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Hydrothermal synthesis of nanocrystalline hydroxyapatite–graphene nanosheet on Ti-6Al-7Nb: mechanical and in vitro corrosion performance

Cited by 12 publications

References 56 publications

Electrophoretic Deposition of Nanohydroxyapatite on Homogenized Magnesium Based Alloy for Biomedical Applications

Electrophoretic Deposition of Nanohydroxyapatite on Homogenized Magnesium Based Alloy for Biomedical Applications

Simultaneous Precipitation and Electrodeposition of Hydroxyapatite Coatings at Different Temperatures on Various Metal Substrates

Role and Mechanism of a Micro-/Nano-Structured Porous Zirconia Surface in Regulating the Biological Behavior of Bone Marrow Mesenchymal Stem Cells

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