Tooth whitening has long forced people to choose between brighter smiles and stronger enamel. A new vibrating tooth powder aims to end that tradeoff, promising to lift stains while actually rebuilding ...

If you’ve never heard of tooth powder, you’re not alone. This age-old product was the precursor to toothpaste, but it fell out of favor decades ago. Even though it’s hard to find on store shelves, ...

A prototype tooth whitening powder activated by the vibrations from an electric toothbrush that whitens and protects teeth ...