A research team in China has unveiled an innovative teeth-whitening powder activated by the vibrations of an electric toothbrush.
Researchers at the Shanghai Xuhui Dental Hospital explained that the new powder combines teeth whitening with enamel protection and gum health maintenance, without the risks associated with traditional chemical whitening agents. The findings were published Monday in the journal ACS Nano.
Even with regular brushing, teeth can become yellowed and stained due to genetic factors or the consumption of foods and drinks such as coffee, tea, and tomatoes. While chemical whiteners are widely used, they can damage enamel in the long run, making this new innovation a safe alternative for home use, according to the team.
The powder, which the researchers named BSCT, is based on a combination of strontium and calcium ions with barium titanate. When exposed to the vibrations of an electric toothbrush, a tiny electric field is generated by the piezoelectric effect. This field produces reactive oxygen species that break down the stain molecules responsible for tooth discoloration.
According to the results, the powder not only removes stains but also strengthens teeth and repairs damaged enamel and dentin. Mineral ions deposit on the tooth surface, enhancing its structure and hardness.
Laboratory experiments on human teeth stained with tea and coffee showed tangible results. A clear improvement in tooth color was observed after four hours of cumulative cleaning, while after 12 hours of use, the teeth were approximately 50 percent whiter compared to a control group cleaned with a saline solution only.
In another experiment on mice fed a high-sugar diet, using the powder for one minute daily for four weeks eliminated harmful bacteria associated with gum disease, restored the natural balance of beneficial bacteria in the mouth, and reduced inflammation in gum tissue.
The researchers confirmed that this innovation represents a new approach to oral care, combining cosmetic whitening with preventative treatment by strengthening enamel and supporting gum health and the oral microbiome.
Although the powder has not yet been incorporated into commercial toothpaste, the findings represent a significant step toward developing safe and effective at-home products for teeth whitening and long-term oral health maintenance.
The team added that the study suggests a potential shift in the concept of teeth whitening, from a temporary cosmetic procedure that may carry risks, to a preventative and therapeutic approach that supports sustainable oral health.