Who may benefit from an assessment?
- General darkening or yellowing of healthy natural teeth
- People with realistic expectations about shade change
- Stable teeth and gums without untreated disease
- Patients willing to follow application and sensitivity instructions
Diagnosis and planning
What the dentist checks first
The dentist identifies the type of discolouration and records existing restorations in the smile area. Surface stain may improve with cleaning, while intrinsic discolouration can respond differently to whitening. Existing sensitivity, gum recession, pregnancy, age and oral-health issues are considered before recommending any product or timing.
Typical journey
How care is planned
- 01
Check
Confirm oral health and identify restorations or discolouration that whitening cannot change.
- 02
Select
Choose an appropriate supervised method and explain likely sensitivity and limitations.
- 03
Whiten
Use the product according to the prescribed amount, duration and tissue-protection method.
- 04
Review
Assess the response and plan maintenance without overusing the whitening material.
Aftercare
Recovery and looking after the result
- Temporary tooth sensitivity or gum irritation can occur and usually improves after reducing or pausing use as advised.
- Avoid exceeding the instructed frequency or duration.
- Colour can be maintained by oral hygiene and moderating frequent staining habits.
- Discuss the timing of new visible fillings or crowns because their colour will not change later.
Important to understand
Risks, limits and alternatives
- Results and longevity vary; a specific shade cannot be guaranteed.
- Fillings, crowns, veneers and dentures do not whiten.
- Some internal stains respond poorly and may need a different cosmetic discussion.
Individual risks and alternatives can only be explained after a clinical assessment. You are welcome to ask for time to consider major or irreversible treatment.
Fees
What can affect treatment cost?
A fee should follow diagnosis and a personal plan. Relevant factors can include:
- Type of supervised whitening method
- Pre-treatment cleaning or disease control
- Custom tray or in-clinic requirements
- Number of sessions or material supplied
- Future maintenance needs
Ask for the proposed stages, alternatives and maintenance needs in writing before proceeding.
Informed decisions
Before you decide
Begin with the diagnosis rather than a preferred procedure. Ask what finding explains your symptoms, what additional information is still uncertain and whether imaging or another opinion would change the plan. A good discussion separates the likely benefit from the result you personally hope for.
Compare reasonable alternatives—including monitoring, a more conservative option, referral or no immediate treatment where safe. Ask about the important risks in your case, the expected number of appointments, how long any temporary stage may last and what could make the plan change. For major or irreversible care, request a written plan and take the time you need to understand it.
Tell the dentist about medicines, allergies, pregnancy, bleeding conditions, diabetes, heart conditions, smoking or tobacco use and previous treatment difficulties. These details can affect anaesthesia, healing and treatment timing. Do not stop prescribed medicine unless the clinician who manages it advises you to do so.
Fees should be linked to the agreed stages. Clarify what the estimate includes, what may be charged separately and what future reviews, repairs or replacement could be needed. Consent is an ongoing conversation: you can ask questions or reconsider before treatment begins.
Common questions
Teeth whitening FAQs
Is teeth whitening safe?
Professionally assessed and correctly used whitening is generally intended to limit avoidable risks. Suitability and instructions matter, especially with sensitivity or oral disease.
Will whitening work on crowns or fillings?
No. Restorative materials do not lighten, so colour matching may need separate planning.
How long does whitening last?
It varies with diet, tobacco, oral hygiene and the original discolouration. Maintenance should avoid unnecessary overuse.
Keep exploring
Related dental care
Patient information updated 26 August 2026. Editorial status: general educational content; named clinician attribution is pending clinic-supplied, verified credentials. This page is not a diagnosis or a substitute for an in-person examination.