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Forsterite-hydroxyapatite composite scaffolds with photothermal antibacterial activity for bone repair

Abstract

Bone engineering scaffolds with antibacterial activity satisfy the repair of bacterial infected bone defects, which is an expected issue in clinical. In this work, 3D-printed polymer-derived forsterite scaffolds were proposed to be deposited with hydroxyapatite (HA) coating via a hydrothermal treatment, achieving the functions of photothermal-induced antibacterial ability and bioactivity. The results showed that polymer-derived forsterite scaffolds possessed the photothermal antibacterial ability to inhibit Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) in vitro, owing to the photothermal effect of free carbon embedded in the scaffolds. The morphology of HA coating on forsterite scaffolds could be controlled through changing the hydrothermal temperature and the pH value of the reaction solution during hydrothermal treatment. Furthermore, HA coating did not influence the mechanical strength and photothermal effect of the scaffolds, but facilitated the proliferation and osteogenic differentiation of rat bone mesenchymal stem cells (rBMSCs) on scaffolds. Hence, the HA-deposited forsterite scaffolds would be greatly promising for repairing bacterial infected bone defects.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 51872185, 51972212, and 52072246) and Shanghai Natural Science Foundation (No. 19ZR1435100).

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Correspondence to Min Zhu, Shichang Zhao or Yufang Zhu.

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Liu, W., Zuo, R., Zhu, T. et al. Forsterite-hydroxyapatite composite scaffolds with photothermal antibacterial activity for bone repair. J Adv Ceram 10, 1095–1106 (2021). https://doi.org/10.1007/s40145-021-0494-x

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Keywords

  • forsterite scaffolds
  • hydroxyapatite (HA) coating
  • bone repair
  • photothermal effect
  • antibacterial activity