Pyro-catalysis for tooth whitening via oral temperature fluctuation

Yang Wang, Shuhao Wang, Yanze Meng, Zhen Liu, Dijie Li, Yunyang Bai, Guoliang Yuan, Yaojin Wang (), Xuehui Zhang (), Xiaoguang Li and Xuliang Deng ()
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Yang Wang: Nanjing University of Science and Technology
Shuhao Wang: Nanjing University of Science and Technology
Yanze Meng: Peking University School and Hospital of Stomatology
Zhen Liu: Nanjing University of Science and Technology
Dijie Li: Nanjing University of Science and Technology
Yunyang Bai: Peking University School and Hospital of Stomatology
Guoliang Yuan: Nanjing University of Science and Technology
Yaojin Wang: Nanjing University of Science and Technology
Xuehui Zhang: Peking University School and Hospital of Stomatology
Xiaoguang Li: Department of Physics, and CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics University of Science and Technology of China
Xuliang Deng: Peking University School and Hospital of Stomatology

Nature Communications, 2022, vol. 13, issue 1, 1-13

Abstract: Abstract Tooth whitening has recently become one of the most popular aesthetic dentistry procedures. Beyond classic hydrogen peroxide-based whitening agents, photo-catalysts and piezo-catalysts have been demonstrated for non-destructive on-demand tooth whitening. However, their usage has been challenged due to the relatively limited physical stimuli of light irradiation and ultrasonic mechanical vibration. To address this challenge, we report here a non-destructive and convenient tooth whitening strategy based on the pyro-catalysis effect, realized via ubiquitous oral motion-induced temperature fluctuations. Degradation of organic dyes via pyro-catalysis is performed under cooling/heating cycling to simulate natural temperature fluctuations associated with intake and speech. Teeth stained by habitual beverages and flavorings can be whitened by the pyroelectric particles-embedded hydrogel under a small surrounding temperature fluctuation. Furthermore, the pyro-catalysis-based tooth whitening procedure exhibits a therapeutic biosafety and sustainability. In view of the exemplary demonstration, the most prevalent oral temperature fluctuation will enable the pyro-catalysis-based tooth whitening strategy to have tremendous potential for practical applications.

Date: 2022
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DOI: 10.1038/s41467-022-32132-3

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