Abstract
The current study involves fabrication and characterization of HA scaffolds containing different copper (Cu) content by ion exchange and 3D extrusion deposition technique. The fabricated pure HA and Cu-doped scaffolds (Cu–HA) were characterized by mechanical behavior, SEM, EDS, XRD, and FT-IR studies. The results show that the Cu-doped HA scaffolds show stronger compressive strength. In addition, the antibacterial properties and biological properties of these scaffolds were investigated in vitro. The antibacterial test results show that the addition of Cu in the HA scaffolds increased antibacterial activity, and the antibacterial properties of scaffolds significantly increased with the addition of Cu. The biocompatibility test results show that the 15Cu–HA scaffolds treated with 15% CuSO4 curing solution significantly inhibited of cell growth on day 7, while the 5Cu–HA scaffolds treated with 5% CuSO4 curing solution the cells observed good grown state on day 7. The 5Cu–HA scaffolds show stronger mechanical behavior, increased antibacterial properties and lower toxicity rat bone marrow mesenchymal stem cells (BMSCs) on day 7. So, the developed 5Cu–HA scaffolds can be used as a good biomaterial for bone tissue engineering.
Highlights
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Copper was successfully doped into hydroxyapatite (HA) scaffolds using copper sulfate as a cross-linking agent.
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Cu–HA scaffolds possessed good antibacterial activity and had no toxicity towards rat bone marrow mesenchymal stem cells (BMSCs) at low concentrations.
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Acknowledgements
This work was supported by Key Laboratory of Lightweight and high strength structural materials of Jiangxi Province (No. 20171BCD40003) and Nanchang Municipal Key Laboratory of 3D Bioprinting Technology and Equipment (No. 2019NCZDSY001); China Scholarship Council (No. 201808360279 to KZ); China Postdoctoral Science Foundation (No. 2017M610402 to FA); Postdoctoral Science Foundation of Jiangxi Province (No. 2017KY06 to FA).
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Ai, F., Chen, L., Yan, J. et al. Hydroxyapatite scaffolds containing copper for bone tissue engineering. J Sol-Gel Sci Technol 95, 168–179 (2020). https://doi.org/10.1007/s10971-020-05285-0
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DOI: https://doi.org/10.1007/s10971-020-05285-0