What it is
Whitening uses a peroxide-based gel to lighten discolouration within the enamel and dentine. It is done in the clinic, or at home with custom-made trays and a lower-strength gel, sometimes as a combination of the two.
Who it may suit
- General yellowing of natural teeth with age
- Staining from tea, coffee or tobacco after cleaning
- People preparing for an event who want a modest change in shade
Signs you may need it
- Teeth look darker in photographs than they used to
- Surface stains return quickly after a clean
How the treatment works
- 1
Check-up first
Decay, gum problems and cracked fillings are treated before whitening is considered.
- 2
Shade record
The starting shade is recorded so any change can be compared honestly.
- 3
Gel application
Gel is applied in the clinic with the gums protected, or dispensed with custom trays for home use.
- 4
Review
The result is reviewed and maintenance advice is given.
Visits and recovery
In-clinic whitening is usually done in a single appointment; home whitening runs over a period of days as directed. Temporary sensitivity to cold during and shortly after treatment is common and typically settles.
Benefits
- A supervised process with the gums protected
- The starting shade is recorded, so the change can be assessed objectively
- Custom trays fit properly and hold gel where it is needed
Limitations
- Whitening does not change the colour of crowns, veneers or fillings
- Results vary between individuals and are not permanent
- Deep internal staining may respond differently and may need another approach
Risks to be aware of
Every dental procedure carries some risk. Your dentist will discuss these with you in person, based on your own examination and X-rays.
- Tooth sensitivity during and after treatment
- Temporary gum irritation if gel contacts the gums
- Uneven appearance where existing restorations are present
Aftercare
- Limit strongly staining food and drink in the days after treatment
- Use a sensitivity toothpaste if teeth feel reactive
- Follow tray instructions exactly if whitening at home
- Keep up regular cleaning appointments to maintain the result
When to contact the clinic
- Sensitivity that does not settle after a few days
- Gum soreness or a white patch on the gum after using trays
