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Chitosan regulated electrochemistry for dense hydroxyapatite/MgO nanocomposite coating with antibiosis and osteogenesis on titanium alloy

Colloid and Interface Science Communications, ISSN: 2215-0382, Vol: 48, Page: 100616
2022
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Article Description

Preparation of hydroxyapatite (HA) coating on the titanium surface through the electrochemical method can improve its osteoinductivity.However, simple HA coating is of low density and easy to shed off, which may result in decreased osteogenesis and antibiosis. Here, chitosan (CS) and Ca 2+, mg 2+ were co-hybridized by pulse electrodeposition (PED) in situ to obtain nanocomposite coating with omogeneously dispersed HA nanoparticles (HA-NPs) and mg(OH) 2 nanoparticles (Mg(OH) 2 -NPs), and dense composite HA/MgO coatings were then prepared after high-temperature sintering. The HA / MgO coating is nano spherical,showed steady and biocompatible Ca 2+, Mg 2+ release due to the regulation of CS and high-temperature sintering, and exhibited superior apatite-forming bioactivity. The antibacterial rate of HA/MgO coating against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) were both over 96%. Osteoblasts (OBs) and vascular endothelial cells (VECs) showed good adhesion and proliferation on the nanocomposite coating, indicating that the nanocomposite coating had favorable angiogenic and osteogenesis.

Bibliographic Details

Xiaonan Zhang; Hui Yin; Lu Xiao; Zhikun Li; Chuang Ma; Wei Xu; Yingbo Wang

Elsevier BV

Biochemistry, Genetics and Molecular Biology; Chemistry; Materials Science; Chemical Engineering

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