Teeth Whitening

Teeth whitening is a cosmetic dental procedure intended to lighten the shade of natural teeth. The cause of discoloration and the condition of the mouth should be assessed first. Suitable options, realistic expectations and possible sensitivity can then be discussed. Results vary, and a particular shade cannot be guaranteed.

Why does tooth color change?

Age, genetics, coffee and tea, tobacco, some medicines, trauma and previous dental treatment may affect tooth color. Surface stains and changes within the tooth structure may not respond in the same way. Understanding the cause is an important part of deciding whether whitening is appropriate.

What is assessed first?

A dentist may assess the teeth and gums, decay or cracks, existing sensitivity, fillings and crowns, the type of discoloration and personal health history. Active decay or gum problems may need attention first. Age, pregnancy or breastfeeding, medicines and other health conditions should also be discussed when suitability is considered.

Which whitening methods may be considered?

For suitable patients, options may include an in-office method supervised by a dentist or dentist-recommended products used at home with individually arranged trays. The product, frequency and duration depend on the examination and selected protocol. Products from unverified sellers, or those with unclear ingredients or directions, may irritate the gums and oral tissues. Avoid high-strength products or abrasive home mixtures without professional advice.

Possible sensitivity and limitations

Temporary sensitivity to hot or cold, or gum irritation, may occur during or after treatment. Symptoms vary; contact your clinic if discomfort is significant or persists. Whitening can change the shade of natural tooth structure, but existing fillings, crowns, bridges, veneers and implant-supported restorations do not lighten in the same way. If you have restorations in a visible area, discuss possible shade differences and any further treatment before whitening.

How long can the result last?

Whitening is not permanent. Natural aging and habits such as consuming colored drinks or using tobacco may affect tooth shade again. How long a result lasts depends on personal habits and oral care. Your dentist can assess whether repeat treatment is appropriate.

Frequently asked questions

Is whitening the same as professional cleaning? No. Professional cleaning helps remove plaque and calculus; whitening is a separate procedure intended to lighten natural tooth shade.

Do fillings become lighter? No. Fillings and crowns do not change shade in the same way as natural teeth.

Is whitening suitable for everyone? No. Suitability is determined after an oral examination and review of health history.

This information is general. Individual suitability and treatment decisions require an examination by a dentist.

Sources

• NHS: Teeth whitening
• Leeds Teaching Hospitals NHS Trust: Tooth whitening