Whitening can brighten a smile noticeably, but the results depend on the method and the cause of the stain. Here is what each option can and cannot do.
Why teeth change colour
Surface stains come from coffee, tea, red wine and smoking. Teeth also darken naturally with age as enamel thins, and some stains form inside the tooth, from injury or certain medications.
Professional whitening
Dentist-supervised whitening uses stronger, controlled products and often gives the most noticeable result, sometimes in a single visit. Your gums are protected during treatment, and your dentist checks your teeth are suitable first.
Take-home trays
Custom-made trays and a dentist-prescribed gel are worn for a set time each day over a couple of weeks. They are gentler and gradual, and give you more control.
Toothpastes and strips
Whitening toothpaste mainly removes surface stains and will not change your natural shade. Strips can lighten teeth modestly but fit less precisely, which can lead to uneven results or gum irritation.
What to expect
- Temporary sensitivity is common
- Crowns, veneers and fillings do not whiten
- Results are not permanent and fade over time
Frequently asked questions
Is whitening safe for my enamel?
When used as directed, professional whitening is considered safe. Overusing products can cause sensitivity.
How long do results last?
Typically from several months to a couple of years, depending on your habits.
This guide is for general information and is not a substitute for professional dental advice. If you are worried about your oral health, speak to a dentist.
