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Nanogels of carboxymethyl chitosan and lysozyme encapsulated amorphous calcium phosphate to occlude dentinal tubules

  • Jinhua Song
  • Haorong Wang
  • Yunqi Yang
  • Zuohui Xiao
  • Haibao Lin
  • Lichun Jin
  • Yan Xue
  • Mingli Lin
  • Fuyu Chen
  • Mengqi Zhu
  • Yanhong Zhao
  • Zhongjun Qiu
  • Yanqiu Li
  • Xu Zhang
Biomaterials Synthesis and Characterization Original Research
  • 217 Downloads
Part of the following topical collections:
  1. Biomaterials Synthesis and Characterization

Abstract

This study aimed to develop of a rapid and effective method to occlude dentinal tubules using carboxymethyl chitosan and lysozyme (CMC/LYZ) nanogels with encapsulated amorphous calcium phosphate (ACP) based on the transformation of ACP to HAP. In this work, CMC/LYZ was used to stabilize ACP and form CMC/LYZ-ACP nanogels, and then the nanogel-encapsulated ACP was applied to exposed dentinal tubule surfaces. The morphology of the nanogels was examined by transmission electron microscopy (TEM). Distribution and quantity of elements in CMC/LYZ-ACP nanogels were determined by element mapping and energy dispersive X-Ray spectroscopy (EDX). Scanning electron microscopy (SEM) images, XRD measurements and nanoindentation were applied to check the efficacy of tubular occlusion. TEM revealed that CMC/LYZ-ACP nanogels were spherical dense gel particles with size approximately 50–500 nm. Element mapping and EDX indicated that C, N, O, Ca, P, and S in the microspheres are thoroughly represented. SEM images shows that the thickness of the coating layer was approximately 1–2 μm and the depth to which the mineralized substance enters the dentinal tubule was approximately 4–8 μm. XRD measurements and nanoindentation indicated that the occluding mineralized substance observed were similar to nature dentin. CMC can form spherical dense nanogels loaded with ACP under the participation of lysozyme. The CMC/LYZ-ACP nanogels could increase the dentinal tubule occluding effectiveness. These results indicated that finding and developing novel nanomaterials of CMC/LYZ-ACP would be an effective strategy for the treatment of dentin hypersensitivity.

Notes

Acknowledgements

This study was financial supported by National Natural Science Foundation of China (Grant numbers 81571016 and 31300798) and Key Scientific and Technological Project of Tianjin Health and Family planning Commission (Grant numbers 16KG114). The authors wish to thank Qing cai of Beijing University of Chemical Technology as well as Peng Yang of Shaanxi Normal University for their contributions.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Jinhua Song
    • 1
  • Haorong Wang
    • 1
  • Yunqi Yang
    • 1
  • Zuohui Xiao
    • 1
  • Haibao Lin
    • 2
  • Lichun Jin
    • 1
  • Yan Xue
    • 1
  • Mingli Lin
    • 1
  • Fuyu Chen
    • 1
  • Mengqi Zhu
    • 1
  • Yanhong Zhao
    • 1
  • Zhongjun Qiu
    • 3
  • Yanqiu Li
    • 1
  • Xu Zhang
    • 1
  1. 1.School and Hospital of StomatologyTianjin Medical UniversityTianjinChina
  2. 2.School and Hospital of StomatologyJiamusi UniversityJiamusiChina
  3. 3.State Key Laboratory of Precision Measuring Technology & InstrumentsTianjin UniversityTianjinChina

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