Teeth Whitening: Safe, Dentist-Supervised Treatment
Teeth whitening lightens natural teeth with a peroxide gel, usually worn in trays made for your mouth. In the UK it counts as dentistry: only GDC-registered professionals may provide it, on a dentist's prescription after an examination, and never for cosmetic reasons on anyone under 18. We offer two systems, Enlighten and Boutique, both as take-home tray courses. Results vary, and sensitivity usually settles after the course.
5.0 from 550+ Google reviews
Open 8am to 8pm, seven days
Free parking at the door
CQC & GDC registered
No referral needed

Clinically reviewed by Dr Ibraheem Ijaz, dentist · GDC 301711
What is professional teeth whitening?
Professional teeth whitening is a dentist-prescribed treatment that lightens the colour of natural teeth using a hydrogen peroxide or carbamide peroxide gel. For home whitening, the gel is held against the teeth in custom trays shaped to fit them.
Hydrogen peroxide is the active ingredient, and carbamide peroxide breaks down into hydrogen peroxide as it works. Evidence suggests the peroxide passes through the enamel and oxidises coloured molecules inside the tooth, which makes the tooth look lighter. The chemistry is explained further in the science pages in this section. With tray whitening, nothing is drilled or removed from the tooth.
Whitening changes colour only, never shape or size, so it suits people whose concern is the colour of otherwise healthy teeth. For the whole course from first appointment to aftercare, see a step-by-step guide to teeth whitening.
Why must teeth whitening be supervised by a dentist?
Teeth whitening must be supervised by a dentist because UK law treats it as the practice of dentistry and restricts the gels used. The General Dental Council's position is that only GDC-registered professionals may provide it. A dentist prescribes the treatment, and it is carried out by that dentist or, working to the prescription, by another dental professional the GDC permits to provide it, such as a dental therapist. Anyone else offering it may be prosecuted.
Separate UK cosmetic product rules apply to whitening gels themselves. Products that contain or release between 0.1% and 6% hydrogen peroxide can be sold only to dental practitioners, and three conditions apply: The home gels used at the practice are 16% carbamide peroxide, which releases less than 6% hydrogen peroxide, and 6% hydrogen peroxide.
- An appropriate clinical examination comes first, to check for decay, gum disease or other problems.
- For each course, the first use must be by a dental practitioner or under their direct supervision, after which the rules allow the patient to complete the course at home.
- The gel cannot be used on anyone under 18 for cosmetic whitening.
Gels stronger than 6% hydrogen peroxide are not permitted for cosmetic whitening at all, and breaking these rules is a criminal offence. NHS guidance adds that kits bought online, or whitening from places without a dental professional, may not work as well and may harm your teeth and gums. You can check a dental professional's registration on the GDC's online register before treatment. The risks are explained in more depth in the safety pages in this section.
What teeth whitening options does Deepcar Dental Care offer?
Deepcar Dental Care offers two professional whitening systems, Enlighten and Boutique, and both are delivered as a take-home tray course. Whitening is provided by our dentists. The course takes two appointments, and your trays are usually ready around a week after the first. The gel supplied is 3 to 4 weeks' worth, in 4 syringes. There is no in-surgery power whitening session, and no whitening light is used.
| Course detail | At Deepcar Dental Care |
|---|---|
| Appointments | 2 |
| Trays ready | Around 1 week after the first appointment |
| Daily wear | Around 6 hours overnight, or around 1.5 hours during the day |
| Tray lifespan | Around 2 years if well looked after |
A hygiene appointment before whitening is recommended. Other whitening options at the practice include:
- Whitening of one arch only, upper or lower
- Internal whitening for a single dark tooth that has had root canal treatment
- Top-up kits for previous patients
- Whitening bundled with another treatment
The systems and options are described in more detail among the whitening options in this section. If you are unsure which route fits your teeth, the guide to working out which option suits helps you decide.
Who is teeth whitening suitable for?
Teeth whitening may suit adults aged 18 or over with healthy teeth and gums whose natural teeth have darkened or yellowed. It is not suitable for:
- anyone under 18
- pregnancy or breastfeeding
- active tooth decay or gum disease
- heavy tetracycline staining
- many crowns or veneers on the front teeth
Clinically, the cause of the discolouration matters: staining inside a root-filled tooth needs a different approach from general yellowing. To read about each condition in more detail, browse the eligibility section.
To ask about teeth whitening, book online or call 0114 288 2121.
What results can you expect from teeth whitening?
Teeth whitening lightens natural teeth, but how much varies from person to person and cannot be promised in advance. The starting colour, the cause of the staining and how closely the wear routine is followed can each affect the outcome. Whitening also has limits:
- Crowns, veneers and fillings will not change colour, so existing work on front teeth stays as it is.
- The effect fades over time, and how long it lasts varies. A top-up is recommended every 6 months to maintain it.
The page on what to expect from whitening results covers the process and its limits step by step.
Does teeth whitening cause sensitivity?
Teeth whitening can cause sensitivity while you are using the gel, and it usually settles within about 2 weeks of finishing. Sensitivity is the main side effect of peroxide whitening. Teeth may feel sharper with cold or sweet food and drink, and some people notice sore gums or white patches on the gums, which are usually temporary.
Desensitising gel is supplied with the course. If sensitivity becomes troublesome, contact the practice so a dentist can advise. Care during and after a course is covered in the aftercare pages in this section.
How much does teeth whitening cost?
Whitening items on the practice's current fee list are priced from £350 to £550. Prices on the fee list are 'from' prices, based on individual clinical needs. Under NHS guidance, whitening for cosmetic reasons is not an NHS treatment, so it is paid for privately and NHS band charges do not apply. For more on what it costs, see the whitening cost page.
Can teeth whitening be combined with other cosmetic treatment?
Teeth whitening can be part of a wider cosmetic plan, and the order matters because only natural teeth lighten. Whitening before composite bonding is offered at the practice, and whitening first is optional, not required. Bonding material, veneers and crowns keep the colour they are made in, so they do not follow the gel. Clear aligner treatment at the practice includes whitening at the end, and align-and-whiten and align-whiten-and-bond packages are available. The order of treatment has its own guide on getting the order of treatment right, and cosmetic dentistry as a wider discipline is explained on its own hub.
Where can you have teeth whitening with us?
You can have teeth whitening at Deepcar Dental Care, 334 Manchester Road, Deepcar, Sheffield, S36 2RH. There is free parking directly outside, the practice is on the ground floor with wheelchair access, and it is open 8am to 8pm, Monday to Sunday. Your medical history can be completed online before your first visit. The practice is around 15 minutes by car from Sheffield city centre and 5 minutes from Stocksbridge, and there is a separate page about teeth whitening in Sheffield. You can also read what patients say on our patient reviews page.
Frequently asked questions
Is teeth whitening available on the NHS?
Teeth whitening is generally not available on the NHS, because it is carried out for cosmetic reasons. NHS guidance says patients pay for it privately at a dental practice. If a tooth has darkened after an injury or root canal treatment, ask a dentist to check it, because the cause needs assessing before any whitening is considered.
Can I whiten my teeth while pregnant or breastfeeding?
No, teeth whitening is not suitable during pregnancy or while breastfeeding. NHS guidance does not recommend it at these times. If either applies to you, tell the dentist before any whitening starts, along with any medicines you take, so they have the full picture.
Do shop-bought whitening kits work the same way?
No, shop-bought kits are not the same as dentist-prescribed whitening. UK rules allow gels releasing more than 0.1% hydrogen peroxide, up to 6%, to be supplied only to dental practitioners, so products sold to the public must stay at or below 0.1%. Strips and paint-on products are not fitted to your teeth, and no examination comes first.
Can one dark tooth be whitened on its own?
Yes, a single dark tooth that has had root canal treatment can often be whitened on its own. Internal whitening places the whitening agent inside the tooth rather than in a tray. At the practice, it takes 2 to 4 sessions. The cause of the darkening needs checking first, because not every dark tooth has been root-filled.
What is the white diet after teeth whitening?
The white diet means avoiding strongly coloured food and drink after whitening, and at the practice it is advised for 2 weeks. Tea, coffee, red wine and dark soft drinks such as cola are typical examples. Smoking should also be avoided during treatment. If you are unsure whether something counts, ask the practice before your course starts.
Does teeth whitening remove enamel?
No, peroxide whitening does not work by removing enamel. Laboratory research suggests the peroxide passes through the enamel and lightens the tooth by oxidising coloured material inside it, mainly in the dentine. The main side effect is temporary sensitivity, and gel strength and wear time are set by a dentist's prescription after an examination.
Book a consultation.
Online in under a minute, or call and speak to a real person.
We look after patients from Deepcar, Stocksbridge and Oughtibridge, and from across north Sheffield, including Wadsley, Hillsborough and Fulwood. Many travel further, from Penistone, Barnsley and Rotherham. The practice is on the A6102 at 334 Manchester Road, and no referral is needed.
334 Manchester Road
Deepcar, Sheffield S36 2RH
0114 288 2121
Contact us
Opening hours
Open 8am to 8pm, seven days
Free parking at the door