Abstract
Introduction
Bacterial infection and aseptic loosening caused by bone resorption at the implant interface are major clinical complications during bone defect implantation surgery, and surface modification of the implant to address the aforementioned problems has long been a research focus.
Materials and methods
In this paper, a chitosan (CTS)–tannic acid (TA) colloid coating with a negative charge and excellent hydrophilicity was prepared on a Ti6Al4V (TC4) surface using a layer-by-layer assembly method. The physical properties, anti-osteoclast activity, and antimicrobial activity of the coatings were investigated.
Results
The findings showed that when the pH value was 5 and the ratio of CTS:TA was 0.8, the carrying rate of TA was the best. Furthermore, the CTS–TA coating had no cytotoxicity on the morphology and proliferation of BMSCs cells and effectively inhibited the differentiation of RAW264.7 cells into osteoclasts and the proliferation of Staphylococcus aureus and Escherichia coli. With the increase in the immersion time of TC4 in CTS–TA colloid solution, the inhibitory effects will also enhance.
Conclusion
Therefore, the preparation of the CTS–TA coating provides a revolutionary technique for implant surface modification to avoid postoperative bacterial infection and aseptic loosening.
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Acknowledgements
This work was supported by the Key R&D Project of Sichuan Province (2018JY0552) and the National Natural Science Foundation of China (No. 51675447).
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Liao, B., Xu, C., Wang, Z. et al. Preparation of chitosan–tannic acid coating and its anti-osteoclast and antibacterial activities in titanium implants. J Bone Miner Metab 40, 402–414 (2022). https://doi.org/10.1007/s00774-022-01309-7
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DOI: https://doi.org/10.1007/s00774-022-01309-7