Smile Teeth whitening: is it safe and what are the options?
Teeth whitening is safe when carried out by a dentist or a registered dental professional. Whitening cannot change the colour of fillings, crowns or veneers.
Why teeth change colour
- Food and drink such as tea, coffee and red wine.
- Smoking and tobacco.
- Poor cleaning, which lets plaque and stains build up.
- Ageing, some medicines and past injury to a tooth.
Whitening options
- Professional whitening by a dentist, with the gum protected and the strength controlled.
- Whitening toothpaste, which can remove surface stains but does not change the natural colour of teeth.
- A professional clean (scale and polish) removes surface stains and can brighten teeth.
Be careful with kits or services sold outside dental practices. Some contain products that are not safe or legal.
Possible side effects
Tooth sensitivity and gum irritation can happen, usually for a short time. Whitening is not suitable for everyone, so speak to your dentist first, especially if you have gum disease, cavities or worn enamel.
How to prevent stains
- Brush twice a day and clean between your teeth.
- Limit tea, coffee, red wine and smoking.
- Rinse with water after staining drinks.
- See a dentist for regular cleanings.
Quick answers
Does teeth whitening damage enamel?
When done properly by a dental professional it is considered safe, but it can cause temporary sensitivity.
How long does whitening last?
It varies. Stains can come back, especially with smoking and staining drinks.
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