Can baking soda be used to wash teeth?

Mar 14, 2025 Source: Cainiu Health
Disease description:

I am 21 years old this year, and I have recently noticed that my teeth are very yellow. I want to try cleaning them with baking soda, but I don't know whether baking soda is safe for cleaning teeth.

Doctor's answer (1)
Dr. Liu Chao

Under normal circumstances, baking soda should not be used directly to wash teeth. Baking soda is an alkaline substance with mild abrasive and cleaning properties. When used correctly and in appropriate amounts, baking soda can be combined with toothpaste for brushing teeth, providing certain whitening and cleaning effects. However, baking soda should not be applied directly to teeth because its particles are relatively large and the texture is coarse. Direct use may scratch the tooth surface, damage the enamel, and even increase the risk of tooth decay. If considering using baking soda to clean teeth, it should be mixed with an appropriate amount of table salt and water to form a paste-like consistency similar to toothpaste before being used for brushing.

Long-term or excessive use of baking soda for brushing teeth may pose risks. Baking soda has strong abrasive properties, and if used improperly, may damage the enamel surface of the teeth, leading to increased tooth sensitivity or even wear. Baking soda also lacks ingredients such as fluoride and cannot provide long-term protection for teeth. It is recommended to consult a professional dentist, undergo regular dental checkups, and adopt scientific oral hygiene practices, such as using fluoride toothpaste, proper brushing techniques, and regular dental cleanings, to maintain good oral health.