Can bicarbonate of soda whiten teeth
Bicarbonate of soda may lift some surface stain through mild abrasion, but it does not bleach the internal colour of a tooth.
The short answer
Bicarbonate of soda can remove some external stain mechanically, but it is not a peroxide bleach and cannot reliably change the intrinsic colour of enamel or dentine.
What is the direct answer?
What does this question mean?
Surface stains sit on the enamel pellicle and may be disturbed by a fine abrasive. Intrinsic colour lies within enamel or dentine and needs a dentist to identify its cause before whitening is selected.
What can you do next?
Use a fluoride toothpaste and a soft brush for routine cleaning rather than scrubbing with loose powder. A dentist can distinguish stain from decay, calculus, fluorosis, medication-related colour, or an old restoration.
When should you seek dental care?
Seek care for a dark single tooth, a cavity, pain, sensitivity, rough enamel, or colour change after trauma. These findings may require diagnosis before any whitening product is used.
What should you ask the dentist?
Ask whether the colour is surface stain or intrinsic discolouration, whether fillings will match after whitening, and which professionally guided option fits your enamel, gums, and sensitivity history.
Frequently asked questions
Can it remove coffee stains?
It may disturb some external stain, but persistent or deep discolouration needs an examination and a suitable whitening plan.
Can powder damage teeth?
The effect depends on abrasivity, pressure, frequency, and the condition of enamel and exposed root surfaces.