Piezo-catalysis for nondestructive tooth whitening

Yang Wang, Xinrong Wen, Yanmin Jia, Ming Huang, Feifei Wang, Xuehui Zhang, Yunyang Bai, Guoliang Yuan and Yaojin Wang ()
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Yang Wang: Nanjing University of Science and Technology
Xinrong Wen: Nanjing University of Science and Technology
Yanmin Jia: Xi’an University of Posts and Communications
Ming Huang: Nanjing University of Science and Technology
Feifei Wang: Shanghai Normal University
Xuehui Zhang: Peking University School and Hospital of Stomatology
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

Nature Communications, 2020, vol. 11, issue 1, 1-11

Abstract: Abstract The increasing demand for a whiter smile has resulted in an increased popularity for tooth whitening procedures. The most classic hydrogen peroxide-based whitening agents are effective, but can lead to enamel demineralization, gingival irritation, or cytotoxicity. Furthermore, these techniques are excessively time-consuming. Here, we report a nondestructive, harmless and convenient tooth whitening strategy based on a piezo-catalysis effect realized by replacement of abrasives traditionally used in toothpaste with piezoelectric particles. Degradation of organic dyes via piezo-catalysis of BaTiO3 (BTO) nanoparticles was performed under ultrasonic vibration to simulate daily tooth brushing. Teeth stained with black tea, blueberry juice, wine or a combination thereof can be notably whitened by the poled BTO turbid liquid after vibration for 3 h. A similar treatment using unpoled or cubic BTO show negligible tooth whitening effect. Furthermore, the BTO nanoparticle-based piezo-catalysis tooth whitening procedure exhibits remarkably less damage to both enamel and biological cells.

Date: 2020
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DOI: 10.1038/s41467-020-15015-3

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