Can baking soda and peroxide whiten teeth
Baking soda can polish surface stain, while peroxide can lighten tooth color, but a homemade mixture may irritate gums and enamel.
The short answer
Baking soda may remove some surface stain and peroxide can bleach tooth color, but a homemade mixture can irritate gums, increase sensitivity, and abrade enamel when used improperly.
How does baking soda act on deposits outside the tooth?
Baking soda is sodium bicarbonate, a mild abrasive that acts mainly on deposits outside the tooth. Hydrogen peroxide is an oxidizing bleaching ingredient, but concentration, contact time, pH, and application technique affect tissue exposure.
What is safer than a concentrated homemade whitening paste?
Use a fluoride toothpaste intended for daily brushing rather than scrubbing with a concentrated homemade paste. A dentist can distinguish surface stain from internal discoloration, treat decay or gum disease, and select a measured whitening method when appropriate.
When should painful or sensitive teeth be checked first?
Seek an examination before whitening if teeth are painful, cracked, decayed, or sensitive, or if the gums bleed. Stop a product that causes burning or persistent pain and obtain care if irritation does not settle.
Which peroxide whitening method fits your teeth?
Ask whether the discoloration is extrinsic or intrinsic, whether existing restorations will match afterward, and which peroxide formulation and delivery method suit your teeth. Ask how sensitivity and gum contact will be managed.
Frequently asked questions
Can this mixture whiten a filling?
No. Tooth-colored restorative materials do not change color in the same way as natural enamel.
Why can whitening hurt?
Peroxide can irritate exposed dentin or gums, while abrasive or prolonged use can increase surface irritation and sensitivity.
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.