Teeth whitening is one of the topics I am asked about most. Many of the questions come from things people have read online or heard from friends. Here are the five I hear most often.
1. “Whitening thins the enamel.”
Whitening done under a dentist’s supervision at a suitable concentration does not thin or permanently damage enamel. Temporary sensitivity for a few days is normal and passes on its own.
2. “Fillings and crowns will whiten too.”
Whitening only affects natural tooth tissue. Fillings or crowns on your front teeth will not change colour, so some may need replacing afterwards. It is important to plan this from the start.
3. “The result lasts forever.”
Results last a long time, but teeth may darken slightly over time with coffee, tea or smoking. Short top-up treatments can be done if needed.
4. “Charcoal, lemon or baking soda work just as well at home.”
These are not recommended. Abrasive powders can wear enamel, and acids such as lemon soften it. As enamel thins, the yellowish layer underneath shows more and teeth can look darker.
5. “Anyone can have whitening.”
Whitening is not recommended with untreated cavities or gum problems, during pregnancy or breastfeeding, or for children. Suitability is decided at the examination.
If you are thinking about whitening, let’s first make sure your teeth and gums are healthy; the best results come from a healthy foundation.
You can find more on the Teeth Whitening page.