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Electrodeposition of Ca–P coatings on biodegradable Mg alloy: In vitro biomineralization behavior ☆

Paper ID Volume ID Publish Year Pages File Format Full-Text
1899 94 2010 7 PDF Available
Title
Electrodeposition of Ca–P coatings on biodegradable Mg alloy: In vitro biomineralization behavior ☆
Abstract

Preparing stabilized apatite on biodegradable Mg alloy may improve biocompatibility and promote osteointegration. In the present work, three kinds of Ca–P coatings, brushite (DCPD, CaHPO4·2H2O), hydroxyapatite (HA, Ca10(PO4)6(OH)2) and fluoridated hydroxyapatite (FHA, Ca5(PO4)3(OH)1−xFx) are fabricated by electrodeposition on a biodegradable Mg–Zn alloy. The crystalline structures, morphologies and compositions of these Ca–P coatings have been characterized by X-ray diffrection, scanning electron microscopy and energy-dispersive spectoscopy. The effects of these coatings on the degradation behavior and mineralization activity of the Mg–Zn alloy have also been investigated. The experimental results showed that these coatings decreased the degradation rate of Mg–Zn alloy, while the precipitates on the uncoated and DCPD-coated Mg–Zn alloy in modified simulated biological fluid had low Ca/P molar ratios, which delayed bone-like apatite formation. Both the HA and FHA coating could promote the nucleation of osteoconductive minerals (bone-like apatite or β-TCP) for 1 month. However, the HA coating transformed from DCPD through alkali heat treatment was fragile and less stable, and therefore its long-term corrosion resistance was not satisfactory. Instead, the FHA was more stable and had better corrosion resistance, and thus it should be better suited as a coating of Mg implants for orthopedic applications.

Keywords
Apatite; Magnesium; Mineralization; Degradation; Fluoride
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Electrodeposition of Ca–P coatings on biodegradable Mg alloy: In vitro biomineralization behavior ☆
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 6, Issue 5, May 2010, Pages 1736–1742
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us