A brighter smile is one of the most common reasons people visit a dentist. The good news is that whitening, done properly, is a safe and predictable treatment for most people. Here is what to know first.
Why teeth change colour
Teeth darken because of what we eat and drink, such as coffee, tea and red wine, because of smoking, and simply with age as the enamel thins and the layer underneath shows through. Some medicines and old fillings can also change the shade.
Why a check comes first
Whitening only works on natural tooth surfaces. It does not change the colour of crowns, veneers or fillings. Before treating you, your dentist checks that your teeth and gums are healthy, treats any cavities, and explains what shade you can realistically expect. Whitening over untreated decay or gum problems can cause pain, so it is important not to skip this step.
Professional whitening versus products from the shop
Professional treatment uses controlled strengths, protects your gums and is supervised by someone who can adjust it if you are uncomfortable. Products bought without advice vary a lot in strength and quality, and can irritate your gums or teeth if used wrongly.
What about sensitivity?
Some people feel mild, temporary sensitivity during or after whitening. It usually passes within a day or two. Using a desensitising toothpaste, avoiding very hot and cold drinks for a short while and following your dentist's aftercare advice all help.
How long do results last?
Results typically last from one to two years, depending on your habits. Coffee, tea, red wine and smoking will darken your teeth again faster. Good brushing and regular cleans help you keep the result for longer.
Who should wait?
Whitening is not recommended during pregnancy, for young children, or when you have untreated decay or active gum disease. If you are not sure whether you are suitable, ask us at your check-up.
