Bicarb soda teeth whitening
Bicarbonate of soda can help remove some surface stain, but it does not bleach the internal colour of teeth and abrasive use can wear enamel or dentine.
The short answer
Bicarbonate of soda is a mild alkaline powder used in some toothpastes. It may polish external stain, while chemical whitening uses peroxide to alter colour within tooth structure.
What is the direct answer?
What does this question mean?
Surface stain sits in the acquired pellicle and deposits on enamel; deeper colour comes from enamel thickness, dentine, fillings, crowns, or natural tooth shade. Powder alone cannot change the colour of restorations.
What can you do next?
Use a formulated fluoride toothpaste rather than rubbing loose powder on teeth, and follow its directions. A dentist can check decay, cracks, gum recession, and restorations before discussing peroxide whitening.
When should you seek dental care?
Seek an examination before whitening if teeth hurt, gums bleed, or you have untreated decay, erosion, or exposed roots. Stop any product that causes marked sensitivity or soft-tissue irritation.
What should you ask the dentist?
Ask whether your discolouration is surface or internal, whether existing fillings will match, and which whitening method and contact time suit your enamel and gums.
Frequently asked questions
What is the main thing to watch for?
Seek an examination before whitening if teeth hurt, gums bleed, or you have untreated decay, erosion, or exposed roots. Stop any product that causes marked sensitivity or soft-tissue irritation.
Can home care replace an examination?
Home care can reduce irritation or discomfort, but it cannot identify or repair every dental cause.