Which Teeth Whitening Treatment Is Right for You?
Adults deciding how to whiten their teeth, or whether whitening will work for them at all, should start with what is causing the colour. Stain type comes first, then health, restorations, timing and sensitivity. Tray whitening, internal whitening for one root-filled tooth, and bonding or porcelain veneers each suit different situations, and results vary from person to person.
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Clinically reviewed by Dr Ibraheem Ijaz, dentist · GDC 301711
Medical disclaimer: This page is for general information only. It does not replace an examination or treatment by a dentist.
This page was reviewed by Dr Ibraheem Ijaz, principal dentist at Deepcar Dental Care, a General Dental Practitioner registered with the GDC under number 301711.
Start with your stain type
Choosing teeth whitening starts with your stain type, because it decides whether whitening can change the colour at all. Dental research describes extrinsic stains on the tooth surface and intrinsic stains inside the enamel or dentine; the page on intrinsic and extrinsic staining explains the causes, and the main page on professionally whitening your teeth introduces dentist-supervised treatment. Every whitening route on this page also depends on whitening being suitable for you.
Surface staining
NHS guidance names coffee, tea, red wine and smoking among the common reasons teeth become stained. Surface stains can be reduced by abrasive cleaning, such as brushing with toothpaste.
Overall darkening or yellowing
Teeth can look darker with age as the enamel thins and more of the dentine underneath shows through. If your natural teeth have darkened evenly and your teeth and gums are healthy, home tray whitening may suit, because the peroxide gel works on colour inside the tooth. Whitening one arch only, the upper or the lower teeth, is also an option at the practice.
One dark tooth
A 2025 British Dental Journal review describes root canal problems and injury as the main local causes of one discoloured tooth, and describes assessing any single discoloured tooth, which can include X-rays, before treatment is chosen. If the tooth has had root canal treatment, internal whitening (internal bleaching) may suit after an assessment, because it lightens the tooth from the inside.
At the practice, internal whitening takes 2 to 4 sessions. The same review notes that internal bleaching carries risks, the most serious being external cervical resorption, a complication affecting the root. If the tooth has not had root canal treatment, finding the cause comes first, because the cause decides the options.
Colour in crowns, veneers or fillings
Crowns, veneers and fillings will not change colour with whitening. If they sit on your front teeth, lighter natural teeth around them can make them stand out, so the order of treatment matters. The page on getting the order of treatment right explains how whitening fits with other cosmetic work.
Four questions that decide it
Four questions shape the choice: what is causing the colour, whether you can have whitening, which teeth are natural, and who is providing it.
1. What is causing the colour?
The cause sets the route, because cleaning can reduce surface stains, peroxide gel works on colour inside natural teeth, and crowns, veneers and fillings will not change colour.
2. Can you have whitening?
At Deepcar Dental Care, whitening is not suitable for under-18s, during pregnancy or breastfeeding, with active decay or gum disease, with heavy tetracycline staining, or for patients with many front crowns or veneers. The eligibility pages in this section look at several of these situations in more detail.
3. Which of your teeth are natural?
NHS guidance says whitening can only lighten the colour of natural teeth, not crowns, dentures or implants.
4. Who is providing it?
In the UK, teeth whitening is the practice of dentistry, and only a dentist can prescribe it. It is then carried out by the dentist or, working to the dentist's prescription, by another dental professional the GDC permits to provide it, such as a dental therapist or a clinical dental technician. Gels containing or releasing between 0.1% and 6% hydrogen peroxide can be sold only to dental practitioners.
These rules also require an appropriate clinical examination before use, to check there are no risk factors or other oral problems, and limit use to the intended frequency and duration. For each cycle of use, the first use must be by a dental practitioner or under their direct supervision, where an equivalent level of safety is ensured, and these gels cannot be used on anyone under 18 except wholly to treat or prevent disease.
NHS guidance says salon whitening and online or pharmacy kits do not work as well and may harm teeth and gums. The comparison pages in this section include dentist-supervised whitening set against shop-bought kits.
Decision matrix: which option may suit which situation?
The matrix matches common situations to the option that may suit and the reason, and no single option suits every row. The whitening routes apply only where whitening is suitable for you.
| If this describes you | This may suit | Because |
|---|---|---|
| Natural teeth have darkened or yellowed overall, and teeth and gums are healthy | Home tray whitening with Enlighten or Boutique | Peroxide gel works on colour inside natural teeth |
| Mostly surface staining from tea, coffee, red wine or smoking | A hygiene visit first, then tray whitening if you still want to whiten | Surface stains can be reduced by abrasive cleaning |
| One dark tooth that has had root canal treatment | Internal whitening after an assessment of the tooth (2 to 4 sessions of whitening) | The tooth is lightened from the inside |
| One tooth that has darkened, with no root canal treatment | A dentist's assessment before any whitening | The cause of a single dark tooth decides the options |
| Heavy tetracycline staining | Composite bonding or porcelain veneers, after assessment | Heavy tetracycline staining is not suitable for whitening at the practice |
| You want to change chips, gaps or shape as well as colour | Composite bonding or porcelain veneers, with whitening first an option before bonding | Whitening lightens colour; it does not change shape |
| Many crowns or veneers on the front teeth | A dentist's advice on the crowns or veneers, rather than whitening | Crowns and veneers do not change colour |
| Under 18, pregnant or breastfeeding, or with active decay or gum disease | Not whitening for now | Whitening is not suitable in these situations |
How much lighter natural teeth become varies from person to person. The page on what whitening can and cannot change sets out realistic expectations.
To ask about teeth whitening, book online or call 0114 288 2121.
If you have an event date
Start well ahead if you are whitening for a wedding or event: NHS guidance says home trays are worn for around 2 to 6 weeks.
At Deepcar Dental Care, whitening natural teeth overall is a take-home tray course using the Enlighten or Boutique whitening systems. There is no in-chair power whitening or one-appointment whitening, and no whitening light is used, so for anyone weighing home or in-surgery whitening, or looking for something quicker, the tray course is the route at the practice. A tray course involves 2 appointments, and the trays are ready around 1 week after the first.
The gel supplied is 3 to 4 weeks' worth, in 4 syringes. Allow too for the 2-week white diet after treatment, when food and drink high in colouring are avoided, and for any sensitivity, which usually settles within about 2 weeks of finishing. How much lighter teeth become, and how quickly, varies, so no result can be timed to a date.
If you have sensitive teeth
If your teeth are already sensitive, tell the dentist before whitening starts, because sensitivity is a common side effect of peroxide whitening.
A 2024 umbrella review found sensitivity can occur whichever whitening technique is used. NHS guidance lists sensitivity, sore gums or throat, and white patches on the gums as side effects, and advises talking to your dentist about any that bother you. At Deepcar Dental Care, desensitising gel is supplied, and sensitivity usually settles within about 2 weeks of finishing.
When whitening is not the answer
Whitening alone is not the answer when colour sits in a restoration, a stain does not fully respond to bleaching, or shape matters too.
A 2019 review notes that bleaching does not fully remove some developmental stains, such as those from fluorosis, and the 2025 British Dental Journal review describes a direct composite veneer as an option where discolouration persists after bleaching. Heavy tetracycline staining is not suitable for whitening at the practice. In these situations, and where chips, gaps or uneven edges are part of the concern, options at the practice include composite bonding, composite veneers and porcelain veneers.
If colour is only part of what you want to change, the guide to working out which option suits you covers the wider choice between cosmetic treatments.
Frequently asked questions
Is teeth whitening available on the NHS?
No. NHS guidance says teeth whitening is not available on the NHS, and that you have to pay for it as a private patient at a dental surgery. NHS guidance also advises checking that whoever provides private whitening is registered, which you can do on the GDC website.
Can whitening be combined with another treatment?
Yes, whitening can be bundled with another treatment at the practice. Whitening before composite bonding is one option, though it is not required, and clear aligner treatment at the practice includes whitening at the end. Ask the dentist which order of treatment suits what you want to change.
Do I have to wear whitening trays overnight?
No, there is a daytime option. With both systems used at the practice, Enlighten and Boutique, trays are worn for around 6 hours overnight or for around 1.5 hours during the day. Ask the dentist which routine fits your day, and wear the trays only for the time advised.
Should I have a hygiene visit before whitening?
Yes, a hygiene visit before whitening is recommended at Deepcar Dental Care. A hygiene appointment lasts 30 to 60 minutes, and you can book one online through the booking portal without registering as a patient. If you smoke, the practice's whitening aftercare advises avoiding smoking during treatment.
How long do whitening trays last, and can I have a top-up?
Trays last around 2 years if they are well looked after. A top-up is recommended every 6 months, and top-up kits are available for previous patients. Crowns, veneers and fillings will not change colour with whitening, and that includes a top-up.
Book a consultation.
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You can book online or call 0114 288 2121 to ask about teeth whitening, and the practice is open 8am to 8pm, Monday to Sunday.
At the practice, whitening is provided by our dentists. Deepcar Dental Care is at 334 Manchester Road, Deepcar, Sheffield, S36 2RH, with free parking directly outside, and the practice is on the ground floor and wheelchair accessible. The page on teeth whitening in Sheffield is written for patients travelling from across the city.
The whitening options in this section, including home tray whitening and internal whitening, each have their own page. If budget is part of the decision, the current prices are on the page about what it costs. You can also read what patients say on our patient reviews page.
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Deepcar, Sheffield S36 2RH
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