Professional whitening uses controlled bleaching agents to lighten many stains within natural teeth. An examination first helps identify decay, gum inflammation, cracks or restorations that may affect safety and expectations.
Which stains respond?
Staining from tea, coffee, tobacco and ageing often responds. Crowns, veneers and fillings do not whiten, and some internal discolouration may need another approach.
In-clinic and take-home options
In-clinic whitening uses carefully isolated gums and a controlled whitening gel. Dentist-prescribed take-home systems use custom trays over a longer period. The appropriate option depends on your teeth, sensitivity and goals.
Possible sensitivity
Temporary tooth sensitivity or gum irritation can occur. Tell your dentist about existing sensitivity and follow the recommended amount and timing rather than applying extra product.
Aftercare
- Limit strongly staining foods and tobacco, especially just after treatment.
- Maintain brushing, interdental cleaning and dental reviews.
- Use sensitivity products if advised.
- Avoid unregulated bleaching products and acidic DIY remedies.
Why teeth become discoloured
Colour changes may come from tea, coffee, tobacco, ageing and surface deposits. Other changes develop within a tooth after injury, during formation or because of medicines. Identifying the stain type matters because not every discolouration responds to bleaching.
What happens before whitening?
The dentist records the starting shade and checks for decay, leaking fillings, gum inflammation, enamel wear and sensitivity. Cleaning may be recommended first. Crowns, veneers and fillings are identified because their colour will not change.
What result should you expect?
Lightening varies with the starting shade and stain type. Natural teeth are not uniformly one colour, and a final shade cannot be guaranteed. Visible restorations may need separate planning after colour stabilises.
Who should postpone whitening?
Whitening is usually postponed with untreated decay, active gum disease or significant sensitivity. It is generally avoided as an elective treatment during pregnancy or breastfeeding. Younger patients require individual assessment.
Cost and longevity
Cost depends on whether care is in-clinic, take-home or combined and whether cleaning or other treatment is required first. Results fade gradually; tobacco and frequent staining drinks can shorten the effect.
Frequently asked questions
Does whitening damage enamel?
Approved products used after assessment and as instructed are designed for dental use. Overuse and unregulated products can increase sensitivity and irritation.
How long does sensitivity last?
It is often temporary. Persistent or severe symptoms should be assessed rather than managed by applying extra product.
Will every stain disappear?
No. Internal stains, enamel defects and restorations may respond poorly or not at all. Another cosmetic approach may be discussed.
Visit our teeth whitening page for treatment details, or book a consultation.