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Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials

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Piezo-catalysis for nondestructive tooth whitening.

Yang Wang¹, Xinrong Wen¹, Yanmin Jia²

¹School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094, Nanjing, Jiangsu, China.

Nature Communications

|March 14, 2020

Summary

A new tooth whitening method uses piezoelectric particles instead of abrasives. This harmless, convenient piezo-catalysis approach effectively whitens teeth stained by common foods and drinks with minimal damage.

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Area of Science:

Materials Science
Biomaterials Engineering
Nanotechnology

Background:

Tooth whitening is popular but traditional methods like hydrogen peroxide can cause enamel damage and gum irritation.
Current whitening techniques are often time-consuming and may pose risks to oral health.

Purpose of the Study:

To develop a nondestructive, harmless, and convenient tooth whitening strategy.
To investigate the efficacy of piezo-catalysis using barium titanate (BTO) nanoparticles for tooth whitening.

Main Methods:

Replaced traditional abrasives in toothpaste with piezoelectric barium titanate (BTO) nanoparticles.
Utilized ultrasonic vibration to induce piezo-catalysis for degrading organic dyes, simulating tooth brushing.
Tested whitening effectiveness on teeth stained with black tea, blueberry juice, and wine.

Main Results:

Poled BTO nanoparticles significantly whitened stained teeth after 3 hours of ultrasonic vibration.
Unpoled or cubic BTO showed negligible whitening effects, highlighting the importance of BTO's poled state.
The BTO nanoparticle piezo-catalysis method demonstrated significantly less damage to enamel and biological cells compared to conventional methods.

Conclusions:

Piezo-catalysis with poled BTO nanoparticles offers a promising, safe, and efficient alternative for tooth whitening.
This novel approach avoids the demineralization and irritation associated with traditional whitening agents.
The technology presents a convenient, nondestructive strategy for achieving a whiter smile.