Tea, coffee, smoking and the passing years darken the colour of teeth. Whitening lightens that colour by several shades without removing any tooth substance.
What is teeth whitening?
Teeth whitening is the removal of coloured organic and inorganic substances that form in the porous enamel and dentine, using whitening gels such as carbamide peroxide. It is carried out by a dentist to remove discolouration in the enamel of yellowed and darkened teeth.
Cleaning first, then whitening
Whitening gel works on a clean tooth surface. So before the procedure, tartar and surface stains are removed and the teeth polished. For many people this cleaning alone makes the teeth look noticeably lighter. If there is decay or gum inflammation, these are treated first.
Whitening methods
In-clinic whitening
The gums are covered with a protective barrier and a high-concentration whitening gel is applied to the teeth. It takes about an hour and the result is visible in the same session.
Home whitening
Clear trays are made to fit your teeth from an impression. You place the low-concentration gel your dentist gives you in the trays and wear them for the recommended time over a few weeks.
Combined treatment
In-clinic whitening is supported with trays used at home. Chosen when a longer-lasting, more even result is wanted.
How does the procedure go?
- ExaminationThe cause of the discolouration is identified; decay, cracks, exposed root surfaces and gum problems are checked.
- CleaningTartar and stains are removed and the teeth polished.
- Recording the starting shadeThe current tooth colour is recorded with a shade guide so the result can be compared.
- WhiteningThe gel is applied according to the chosen method.
- Aftercare adviceYou are told what to look out for so the result lasts.
After whitening
- For the first 48 hours avoid staining foods and drinks such as tea, coffee, cola, red wine, tomato paste and pomegranate.
- Do not smoke during this time.
- Sensitivity to cold for a few days is normal; a desensitising toothpaste helps.
- Keep brushing twice a day and cleaning between your teeth.
Whitening only affects natural tooth tissue. The colour of fillings, crowns and prostheses does not change; if you have these in the front of the mouth they may need replacing after whitening.
Frequently asked questions
Does whitening damage the teeth?
Carried out under a dentist's supervision and for the recommended time, it does not cause lasting damage to the enamel. The most common side effect is tooth sensitivity, which passes within a few days.
How long does the effect last?
Between six months and two years, depending on diet and care. Tea, coffee and smoking make the colour darken sooner.
Can everyone have their teeth whitened?
Whitening is not recommended for pregnant or breastfeeding women, for anyone under 18, or for people with untreated decay or gum disease. Whether you are suitable is decided at the examination.
Are scaling and whitening the same thing?
No. Cleaning removes tartar and stains stuck to the tooth; whitening lightens the tooth's own colour. Cleaning is done before whitening.
This page is for general information and is not a substitute for an examination. The right treatment for you is decided after your dentist's examination and any imaging needed.