Baking soda and hydrogen peroxide teeth whitening
Baking soda may abrade surface stain, but mixing it with hydrogen peroxide can irritate gums and does not replace supervised whitening.
The short answer
Baking soda and hydrogen peroxide are not a reliable substitute for dentist-guided whitening; the mixture can irritate oral tissues, and abrasive use can wear enamel or dentine.
What is the direct answer?
What does this question mean?
Baking soda is sodium bicarbonate, a mild abrasive that can remove some surface deposits mechanically. Hydrogen peroxide can oxidise stain molecules, but concentration, contact time, tissue exposure, and the condition of enamel, dentine, fillings, crowns, and gums affect the result and the risk of irritation.
What can you do next?
Do not scrub teeth with a concentrated or frequently applied mixture. A dentist can first check for decay, cracks, gum disease, exposed roots, and restorations, then discuss a measured peroxide product or another approach; fillings and crowns do not bleach like natural enamel.
When should you seek dental care?
Arrange an examination before whitening if teeth are sensitive, gums bleed, enamel is cracked, or a single tooth has darkened. Stop any whitening product and seek care for persistent burning, ulceration, marked sensitivity, or swelling.
What should you ask the dentist?
Ask whether the discoloration is surface stain or an internal change, whether whitening suits your enamel and gums, what material is present in each visible tooth, and how sensitivity will be managed.
Frequently asked questions
Will this mixture whiten a crown?
No. A crown’s ceramic or resin shade is not bleached like natural tooth structure.
Why can whitening cause sensitivity?
Peroxide can move through enamel and dentine and temporarily stimulate the tooth nerve, especially when dentine is exposed.