Can baking soda and hydrogen peroxide whiten teeth
Baking soda can polish surface stains, while peroxide can lighten tooth color, but a homemade mixture can irritate gums and enamel.
The short answer
Baking soda can polish surface stains, while peroxide can lighten tooth color, but a homemade mixture can irritate gums and enamel. It cannot change the color of fillings, crowns, veneers, or other restorations.
How does baking soda affect stains on the tooth surface?
Baking soda is a mildly abrasive sodium bicarbonate powder. Hydrogen peroxide is an oxidizing agent; its whitening effect and tissue irritation depend on concentration, contact time, frequency, and the condition of the teeth and gums.
How can you avoid irritation when trying to whiten teeth?
Do not scrub with a dry powder or use concentrated peroxide in the mouth. For whitening, choose a product with clear directions or ask a dentist to assess staining, enamel wear, cavities, gum health, and existing restorations first.
When should you seek advice before whitening at home?
Seek advice before whitening if you have sensitivity, gum recession, decay, cracks, ulcers, or extensive restorations. Stop a whitening method if burning, persistent pain, or marked sensitivity develops and arrange an examination.
Which whitening option is suitable for your discolouration?
Ask what is causing the discoloration and whether professional whitening, a dentist-dispensed tray, cleaning, or restorative treatment fits your teeth. Ask how existing fillings or crowns will affect the final shade.
Frequently asked questions
Will this mixture whiten fillings?
No. It may change natural tooth color while leaving fillings, crowns, and veneers unchanged.
Why can whitening cause sensitivity?
Peroxide can pass through enamel and dentine toward the pulp, temporarily irritating the tooth nerve in some people.
Who wrote this page
This library is published by Dental Nation, a licensed dental group practising in the United Arab Emirates. Pages are written and overseen by the same clinical team that treats patients in our clinics, and are held to a fixed editorial standard for safety and accuracy.
This page is patient education, not medical advice, and cannot replace an examination. Anything urgent — facial swelling, trauma, uncontrolled bleeding or severe pain — needs a dentist or emergency care now.