Why do teeth change colour and when does whitening help?

Discoloured teeth are a common reason for considering whitening. But the causes vary, and whether whitening can help depends on them. What is suitable is assessed at an examination.

External causes of discolouration

Coffee, tea, red wine, tobacco and some foods can leave surface stains. Such changes often respond better to whitening.

Internal causes

Changes within the tooth, for example after an injury or certain treatments, are different in nature and may respond less well to conventional whitening.

Ageing and enamel wear

Over time the enamel becomes thinner, so the darker dentine beneath becomes more visible. This affects the overall impression of colour.

When whitening can help

With surface and age-related changes, whitening can often lighten the shade. For other causes, other solutions are considered.

What is assessed at the examination

The cause of the discolouration is identified so that we can suggest the approach that makes most sense in your case.

Frequently asked questions

Why is one of my teeth darker than the others?
It may be an internal change; the cause is assessed at the examination.

Does whitening help with all stains?
No; the effect depends on the cause of the discolouration.

Can I prevent further darkening?
Habits and oral hygiene play a part; we give advice tailored to you.

At the examination we can assess what makes sense in your case and suggest the next step.