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Improvements on biological and antimicrobial properties of titanium modified by AgNPs-loaded chitosan-heparin polyelectrolyte multilayers

  • Biocompatibility Studies
  • Original Research
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Journal of Materials Science: Materials in Medicine Aims and scope Submit manuscript

Abstract

Microbial infection around dental implants is a major cause for the loss of devices, including soft tissue infection in early period, post-operation peri-implantitis, and osseointegration failure. Silver nanoparticles (AgNPs) with wide antimicrobial spectrum, strong antimicrobial effect and hypotoxicity, as well as low incidence of antibiotic resistance, are widely involved in biomedical applications. Herein, firmly anchoring AgNPs onto the surface of implants through physical-chemical reaction is likely to relieve the above issues. In this study, AgNPs were biosynthesized by a simple and “green” method with chitosan (CS) as stabilizing and reducing agents. Then, AgNPs-loaded CS-heparin polyelectrolyte multilayers (PEMs) were constructed on alkali-heat treated titanium (Ti) substrates via layer-by-layer (LbL) self-assembly technique. The successful surface modification could be confirmed by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), and the constructed system could provide the continuous release of Ag+ over 28 days till mucosa healing. In short, this work revealed that the construction of multilayer coatings containing AgNPs on Ti substrates promoted adhesion and proliferation of human gingival fibroblasts (HGFs) and also enhanced the antimicrobial properties. This manifests the LbL technique is a viable and promising method for forming continuous antimicrobial coatings, to reduce microbial infection and improve the quality of peri-implant soft tissue seal.

The preparation process of AgNPs-loaded CS-heparin PEMs on Ti substrate.

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Acknowledgements

This work was supported by the project of State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (No. LSL-1309), the National Natural Science Foundation of China (No. 81701029), the Natural Science Foundation of Gansu Province (Nos. 17JR5RA335 and 1606RJZA185), and the Autonomous Research Project of State Key Laboratory of Military Stomatology (No. 2016KB02).

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Author notes

  1. These authors contributed equally: Wen Li, Yanwei Yang, Hongchen Zhang

  2. These authors jointly supervised this work: Yinong Qiu, Bin Liu

Authors and Affiliations

  1. School of Stomatology, Lanzhou University, Lanzhou, 730000, P. R. China

    Wen Li, Hongchen Zhang, Zexian Xu, Libo Zhao & Bin Liu

  2. Department of Stomatology, Lanzhou General Hospital, Lanzhou Military Area Command, PLA, Lanzhou, 730050, P. R. China

    Yanwei Yang, Hongchen Zhang & Yinong Qiu

  3. State Key Laboratory of Military Stomatology, School of Stomatology, Fourth Military Medical University, Xi’an, 710032, P. R. China

    Yanwei Yang & Hongchen Zhang

  4. School of Nursing, Lanzhou University, Lanzhou, 730000, P. R. China

    Hongchen Zhang

  5. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China

    Jinqing Wang

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  1. Wen Li
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Li, W., Yang, Y., Zhang, H. et al. Improvements on biological and antimicrobial properties of titanium modified by AgNPs-loaded chitosan-heparin polyelectrolyte multilayers. J Mater Sci: Mater Med 30, 52 (2019). https://doi.org/10.1007/s10856-019-6250-x

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