Preparation of hydroxyapatite coating on smooth implant surface by electrodeposition

Lin, Dongyang; Wang, Xiaoxiang

doi:10.1016/j.ceramint.2010.08.018

Cited by 33 publications

(15 citation statements)

References 10 publications

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“…Bioceramics-based coatings are today among the most promising candidates for improving the osseointegration of porous scaffolds due to their apatite-mineralization ability 2 , 3 , 7 – 12 . Different types of synthetic HydroxyApatite (HAp) are frequently used as coatings due to high biocompatibility and similarities with human bone constituents 22 – 31 . Several types of synthetic apatites are now commercially manufactured, being available for biomedical applications such as bone repair, augmentation and substitution and also for coatings on dental and orthopaedic implants 32 , 33 .…”

Section: Introductionmentioning

confidence: 99%

“…ED is rather inexpensive and does not need complex equipment operating in extreme environment. It allows obtaining a highly crystalline structure of coatings with low residual stresses and is capable of coating porous and geometrically complex structures 27 – 31 . Moreover, ED provides good control of the resulting coating properties and surface structures through adjusting deposition parameters such as applied potential and current density, deposition time, electrolyte temperature, ionic concentration and pH value 42 – 44 .…”

Section: Introductionmentioning

confidence: 99%

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Influence of the electrolyte’s pH on the properties of electrochemically deposited hydroxyapatite coating on additively manufactured Ti64 alloy

Vlădescu

Vrânceanu

Kulesza

et al. 2017

Sci Rep

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Properties of the hydroxyapatite obtained by electrochemical assisted deposition (ED) are dependent on several factors including deposition temperature, electrolyte pH and concentrations, applied potential. All of these factors directly influence the morphology, stoichiometry, crystallinity, electrochemical behaviour, and particularly the coating thickness. Coating structure together with surface micro- and nano-scale topography significantly influence early stages of the implant bio-integration. The aim of this study is to analyse the effect of pH modification on the morphology, corrosion behaviour and in vitro bioactivity and in vivo biocompatibility of hydroxyapatite prepared by ED on the additively manufactured Ti64 samples. The coatings prepared in the electrolytes with pH = 6 have predominantly needle like morphology with the dimensions in the nanometric scale (~30 nm). Samples coated at pH = 6 demonstrated higher protection efficiency against the corrosive attack as compared to the ones coated at pH = 5 (~93% against 89%). The in vitro bioactivity results indicated that both coatings have a greater capacity of biomineralization, compared to the uncoated Ti64. Somehow, the coating deposited at pH = 6 exhibited good corrosion behaviour and high biomineralization ability. In vivo subcutaneous implantation of the coated samples into the white rats for up to 21 days with following histological studies showed no serious inflammatory process.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of the electrolyte’s pH on the properties of electrochemically deposited hydroxyapatite coating on additively manufactured Ti64 alloy

Vlădescu

Vrânceanu

Kulesza

et al. 2017

Sci Rep

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“…Different methods have been developed for coating CaP layers onto implant surfaces, such as plasma spray [ 18 ], sol–gel [ 19 ], biomimetic [ 20 ], chemical vapor deposition [ 21 ], ion implantation [ 22 ], and electrochemical deposition [ 23 ]. Electrochemical deposition, a liquid-based process, has been suggested as an effective means of fabricating CaP coatings on intricate geometry substrates [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

“…Electrochemical deposition, a liquid-based process, has been suggested as an effective means of fabricating CaP coatings on intricate geometry substrates [ 24 ]. By using a lower working temperature, changes in the chemical composition and crystal structure of the substrate (normally caused by conventional sintering processes) can be avoided [ 23 ]. Meanwhile, the chemical composition, physical phases, and microstructure of substrates subjected to electrochemical deposition are controlled by parameters associated with the process of deposition, such as deposition temperature, voltage, current density, and electrolytic concentration [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Electrolytic Concentration on the Electrochemical Deposition of Calcium Phosphate Coating on a Direct Laser Metal Forming Surface

Sun

Yang

Luo

et al. 2017

International Journal of Analytical Chemistry

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A calcium phosphate (CaP) coating on titanium surface enhances its biocompatibility, thus facilitating osteoconduction and osteoinduction with the inorganic phase of the human bone. Electrochemical deposition has been suggested as an effective means of fabricating CaP coatings on porous surface. The purpose of this study was to develop CaP coatings on a direct laser metal forming implant using electrochemical deposition and to investigate the effect of electrolytic concentration on the coating's morphology and structure by X-ray diffraction, scanning electron microscopy, water contact angle analysis, and Fourier transform infrared spectroscopy. In group 10−2, coatings were rich in dicalcium phosphate, characterized to be thick, layered, and disordered plates. In contrast, in groups 10−3 and 10−4, the relatively thin and well-ordered coatings predominantly consisted of granular hydroxyapatite. Further, the hydrophilicity and cell affinity were improved as electrolytic concentration increased. In particular, the cells cultured in group 10−3 appeared to have spindle morphology with thick pseudopodia on CaP coatings; these spindles and pseudopodia strongly adhered to the rough and porous surface. By analyzing and evaluating the surface properties, we provided further knowledge on the electrolytic concentration effect, which will be critical for improving CaP coated Ti implants in the future.

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“…Moreover, the deposited coating is not always pure due to the presence of trace amounts of the substrate material that is mixed into the coating. This induces the formation of new phases in the surface layer [87][88][89][90][91][92]. Song et al [87] applied HA coating on AZ91 by electrodeposition and found that HA layer can decrease the degradation rate of Mg alloy substrate.…”

Section: Ha and Ca-p Electrodeposited Coatingsmentioning

confidence: 99%

Surface modification and corrosion properties of Mg based alloys for bio-implant application

Asl¹

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The use of implants for bone repair has a considerable and successful history. Traditionally, metallic implants have been used in such a way that the implant would be surgically removed after sufficient bone healing has been achieved. During the last decade, interest in biodegradable magnesium (Mg) implants has increased dramatically. The use of Mg is based on the fact that Mg is one of the essential elements for human metabolism, and the density and elastic modulus of Mg are close to the human bone, thus, avoiding stress shielding effect. However, Mg alloys corrodes too rapidly, resulting in hydrogen evolution and consequently, local alkalization close to the surgery region as well as premature degradation in the implant's mechanical integrity before bone healing occurred. All these factors impede the practical applications of Mg implants. In this study, a hydrothermal coating process was used to provide, uniform and biodegradable inorganic calcium-phosphate (Ca-P) and calcium-phosphate/polymer (Ca-P/Polymer) composite coatings on AZ31 magnesium substrate that slow the corrosion of Mg and to meet different requirements for implant application. In the current study two different types of novel Ca-P/Polymer composites coatings were successfully deposited for the first time on AZ31 magnesium alloy to reduce CaP material brittleness by using polyacrylic acid and carboxymethyl cellulose polymers. The results showed, crystal phase and coating's morphology could be successfully controlled by the type and concentration of polymer used which could affect the coating's degradation rate as well. Incorporation of polymer in the CaP coatings reduced the coating elastic modulus bringing it close to that of Mg and that of human bone. Apart from mechanical properties, cell proliferation studies indicated that composite coatings induced better cell attachment compared to the purely inorganic CaP coating.

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Preparation of hydroxyapatite coating on smooth implant surface by electrodeposition

Cited by 33 publications

References 10 publications

Influence of the electrolyte’s pH on the properties of electrochemically deposited hydroxyapatite coating on additively manufactured Ti64 alloy

Influence of the electrolyte’s pH on the properties of electrochemically deposited hydroxyapatite coating on additively manufactured Ti64 alloy

The Influence of Electrolytic Concentration on the Electrochemical Deposition of Calcium Phosphate Coating on a Direct Laser Metal Forming Surface

Surface modification and corrosion properties of Mg based alloys for bio-implant application

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