Snow whitening before and after
Before-and-after whitening photographs show a shade change, but lighting, dehydration, restorations, and stain type can alter the comparison.
The short answer
Before-and-after results from a branded whitening kit show how natural teeth may change shade, but photographs are not a reliable prediction for every patient.
How does peroxide change the colour of tooth tissue?
Whitening peroxide changes the colour of stain molecules within enamel and dentine. The visible result depends on whether discolouration comes from food and tobacco, ageing, trauma, medication, fluorosis, or a restoration.
How can you compare whitening results fairly?
Compare teeth in the same light and avoid judging immediately after treatment, when dehydration can temporarily alter their appearance. A dental examination and shade record give a more useful baseline than an online photograph.
When should uneven or dark tooth colour be examined?
Arrange an examination when one tooth is grey or brown, the colour change follows an injury, or whitening leaves patches. A dentist should check decay, pulp changes, enamel defects, and restorations before further treatment.
What should you ask before choosing a whitening treatment?
Ask what caused your discolouration, which shade change is realistic, and whether fillings or crowns will need replacement for a colour match. Ask how the shade will be recorded and which method will be supervised.
Frequently asked questions
Why do teeth look whiter just after treatment?
Temporary dehydration can make enamel look lighter until it rehydrates.
Will deep stains respond to a home kit?
Some internal stains respond incompletely, and the cause should be assessed before repeating treatment.
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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.