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Research Article

A sprayable superhydrophobic dental protectant with photo-responsive anti-bacterial, acid-resistant, and anti-fouling functions

Siyu Zhao1,2,3,§Xuetao Yang1,2,§Yingying Xu1,3Zhenzhen Weng4Lan Liao1,3( )Xiaolei Wang2,4( )
The Affiliated Stomatological Hospital, Nanchang University, Nanchang 330006, China
The National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, Nanchang University, Nanchang 330088, China
The Key Laboratory of Oral Biomedicine, Nanchang 330006, China
College of Chemistry, Nanchang University, Nanchang 330088, China

§ Siyu Zhao and Xuetao Yang contributed equally to this work.

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Graphical Abstract

A sprayable protectant (ZFP) is designed to renovate the concept of current dental protection, realizingmultiple functions (anti-bacterial, acid-resistant, and anti-fouling) to maintain the health and beauty ofthe teeth.

Abstract

Effective dental care can reduce the incidence of oral diseases (dental caries, dentin sensitivity, tooth discoloration, etc.). However, delayed or inappropriate usage of care tools not only fails to eliminate external adverse stimuli, but sometimes even causes dental injury. Inspired by the traditional culture of “lacquer teeth”, a sprayable superhydrophobic protectant (ZFP) composed of ZnO, fluorine modified nano-silica (FSNs), and polydimethylsiloxane (PDMS) is constructed similar to automobile wax, for routine dental protection. With its superhydrophobic properties, this protective membrane can effectively resist the adhesion of bacteria, proteins, and food residues to the teeth surface. Meanwhile, ZFP exerts stable superhydrophobic self-cleaning properties under external mechanical stimulation, temperature alternation, and acidic environment. In addition, ZnO in ZFP can significantly restrain the growth of dental caries-related bacteria (Streptococcus mutans), with an enhanced anti-bacterial capacity when combined with yellow light irradiation. Both in vivo and in vitro experiments demonstrate that ZFP is a safe, convenient, and quadruplex-effective dental protectant, which is expected to serve as a promising toothpaste companion for joint maintenance of dental health.

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Nano Research
Pages 5245-5255
Cite this article:
Zhao S, Yang X, Xu Y, et al. A sprayable superhydrophobic dental protectant with photo-responsive anti-bacterial, acid-resistant, and anti-fouling functions. Nano Research, 2022, 15(6): 5245-5255. https://doi.org/10.1007/s12274-022-4136-6
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Received: 04 November 2021
Revised: 03 January 2022
Accepted: 04 January 2022
Published: 09 March 2022
© Tsinghua University Press 2022
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