What are the tooth whitening treatments available at a boutique London dental practice?

What are the tooth whitening treatments available at a boutique London dental practice?

Tooth whitening is a safe, clinically proven procedure that lightens the natural colour of your teeth using peroxide-based agents, available in two main forms: in-clinic whitening completed in a single appointment, and home whitening using custom trays worn over several weeks. At Battersea Smiles, a boutique dentist London practice based in Battersea, both routes are offered under GDC-regulated protocols, with results typically ranging from four to eight shades lighter depending on the starting tooth colour and treatment method chosen.

Key takeaways

• Professional teeth whitening in the UK uses hydrogen peroxide or carbamide peroxide gels regulated under the Cosmetic Products Regulation, capped at 6% hydrogen peroxide for dentist-supplied products.
• In-clinic whitening at a London boutique practice costs between £350 and £700 per session, depending on the system used and the level of clinical time involved.
• Home whitening kits supplied by a dentist, using custom-fitted trays, typically cost between £250 and £400 and require daily wear of one to four hours over two to four weeks.
• Over-the-counter whitening strips available in the UK contain no more than 0.1% hydrogen peroxide, which is why their results are significantly less pronounced than professionally supplied products.
• Teeth whitening does not change the colour of crowns, veneers, or composite bonding, a fact that must be factored into any treatment plan involving multiple restorations.
• At Battersea Smiles, approximately 70% of whitening patients combine their whitening treatment with another aesthetic procedure, most commonly composite bonding or Invisalign, to achieve a more uniform final result.

What is tooth whitening and how does it work?

Tooth whitening is the process of lightening intrinsic or extrinsic staining within the enamel and dentine using an oxidising agent, most commonly hydrogen peroxide or its precursor carbamide peroxide. The peroxide molecule diffuses through the enamel surface and breaks down the chromogenic (colour-producing) compounds that accumulate inside the tooth structure over time.

The process does not strip or damage enamel when used at regulated concentrations. The active agent degrades naturally into water and oxygen, leaving no chemical residue in the tooth. Sensitivity during and after treatment occurs because peroxide temporarily increases the permeability of the enamel, allowing temperature changes to reach the dentinal tubules more easily.

Whitening works on natural tooth structure only. It has no effect on ceramic crowns, porcelain veneers, or tooth-coloured composite resin fillings. This distinction matters enormously when planning treatment, because any existing restorations will remain at their original shade while the surrounding natural teeth lighten.

What causes teeth to discolour in the first place?

Tooth discolouration falls into two categories: extrinsic and intrinsic. Extrinsic staining sits on or just below the enamel surface and is caused by dietary tannins from tea, coffee, and red wine, tobacco use, and the natural ageing process. This type responds most readily to whitening treatment.

Intrinsic staining is embedded within the dentine and can result from tetracycline antibiotic use during tooth development, excessive fluoride ingestion in childhood (dental fluorosis), trauma to the tooth, or simply the natural thickening of dentine that occurs with age, which makes teeth appear more yellow. Intrinsic staining is harder to treat and may require a longer course of home whitening or, in pronounced cases, an alternative approach such as veneers.

What are the different types of tooth whitening treatment available?

There are three clinically meaningful categories of tooth whitening available in the UK in 2026: in-clinic whitening, dentist-supplied home whitening, and over-the-counter products. Each differs in peroxide concentration, the precision of application, the speed of results, and the degree of clinical oversight involved.

How does in-clinic tooth whitening work, step by step?

In-clinic whitening, sometimes called power whitening or laser whitening (though light-activated is the more precise term), is completed in a single appointment lasting approximately 60 to 90 minutes.

1. A dentist or hygienist photographs and records the baseline tooth shade using a Vita shade guide, so results can be measured objectively at the end of treatment.
2. A rubber dam or protective gel is applied to the gum tissue to isolate the teeth and prevent the whitening agent from contacting soft tissue.
3. A high-concentration hydrogen peroxide gel, typically 25–40% for in-clinic use (applied by the dentist under controlled conditions), is placed directly onto the front surfaces of the teeth.
4. Where a light or laser activation unit is used, it is held close to the teeth for specified intervals, usually three cycles of 15 to 20 minutes, to accelerate the oxidation reaction.
5. The gel is suctioned away between cycles, and fresh gel is applied.
6. After the final cycle, the gel is fully removed, and the shade is re-recorded. Most patients see a shift of four to eight shades in a single session.
7. A fluoride desensitising agent is applied to reduce post-treatment sensitivity.

At Battersea Smiles, patients are advised to avoid strongly pigmented foods and drinks, including coffee, red wine, and tomato-based sauces, for at least 48 hours after in-clinic treatment. This is sometimes called the “white diet” period, during which the enamel pores remain temporarily more open and susceptible to re-staining.

How does home whitening with custom trays work?

Dentist-supplied home whitening uses a lower concentration of peroxide gel (typically 10–16% carbamide peroxide, equivalent to approximately 3–6% hydrogen peroxide) applied inside custom-made trays that fit precisely over the teeth. The trays are fabricated from impressions or a digital scan of your teeth, which means the gel is held evenly in contact with the tooth surface without excess material contacting the gums.

The standard protocol at Battersea Smiles involves wearing the trays for one to four hours per day, or in some cases overnight, over a period of two to four weeks. The longer, lower-concentration approach tends to produce more even results with less sensitivity compared to in-clinic treatment, particularly for patients who have sensitive teeth at baseline.

Custom trays are also useful for long-term maintenance. Once fabricated, they can be used with top-up gel supplies purchased from the practice as needed, making home whitening the more cost-effective option over several years.

How much does tooth whitening cost in London in 2026?

The cost of professional tooth whitening in London varies based on the treatment type, the practice, and whether it is provided as part of a broader aesthetic treatment plan.

In-clinic whitening at a boutique London practice typically costs between £350 and £700 for a single session. Dentist-supplied home whitening kits, including custom trays and a full course of gel, generally cost between £250 and £400. A combined programme using both in-clinic and home whitening can reach £500 to £900 depending on the number of in-clinic sessions involved.

Over-the-counter products remain significantly cheaper at £20 to £60, but their results cannot be meaningfully compared to professionally administered treatment due to the strict legal cap on peroxide concentration in consumer products.

It is worth noting that tooth whitening is a cosmetic treatment and is therefore not available on the NHS. All costs are met privately.

Who is suitable for tooth whitening, and who is not?

Most adults with natural teeth and healthy gums are suitable candidates for professional tooth whitening. A dental examination before treatment is a legal and clinical requirement; no registered UK dentist should supply whitening products without first assessing the patient’s oral health.

Tooth whitening is not recommended in the following circumstances: active tooth decay or gum disease (which must be treated first), pregnancy or breastfeeding (as a precautionary measure, not because harm has been demonstrated), teeth with extensive existing restorations in prominent positions, and children under 18 (prohibited under UK regulations).

Patients with pronounced sensitivity may be advised to use a sensitivity-reducing toothpaste containing potassium nitrate or stannous fluoride for two weeks before treatment begins. In our experience at Battersea Smiles, patients who follow this preparation step report noticeably less discomfort during and after whitening.

Tooth whitening vs composite bonding vs veneers: which treatment is right for you?

Tooth whitening, composite bonding, and veneers all improve the appearance of teeth, but they address different concerns and involve very different levels of intervention.

Whitening is almost always recommended before composite bonding or veneers, because the dentist will shade-match the composite or porcelain to the whitened tooth colour. Doing whitening after bonding would leave the natural teeth lighter than the restorations.

Does tooth whitening damage enamel?

No, professional tooth whitening at regulated concentrations does not damage enamel. This is one of the most common concerns patients raise, and the evidence base is clear on this point. Multiple peer-reviewed studies, including a 2022 systematic review published in the Journal of Dentistry, found no clinically significant structural change to enamel from professionally supervised whitening using carbamide or hydrogen peroxide within licensed concentrations.

The temporary sensitivity experienced by some patients after whitening is reversible and is caused by the increased permeability of enamel during treatment, not by structural damage. Once treatment ends, the enamel returns to its normal permeability, and sensitivity resolves, usually within 24 to 72 hours.

Overuse of whitening products, particularly unsupervised use of very high concentrations obtained outside the regulated dental supply chain, can cause surface erosion and pulpal irritation. This is why legal restrictions on consumer-grade peroxide concentrations exist in the UK.

How long do tooth whitening results last?

Tooth whitening results are not permanent. In most patients, the whitened shade begins to fade gradually over six to 24 months, depending on dietary habits, tobacco use, and oral hygiene. Patients who consume large amounts of tea, coffee, or red wine, or who smoke, will see results fade more quickly.

Maintenance with top-up home whitening, using the original custom trays, can extend results significantly. A two to three night course of home whitening gel used every six to 12 months is usually sufficient to maintain the achieved shade. At Battersea Smiles, top-up gel refills are available directly from the practice, which is more cost-effective than repeating a full course.

Frequently Asked Questions

Is tooth whitening safe?

Yes, tooth whitening is safe when carried out by a registered dental professional using products within UK-regulated peroxide concentrations. The procedure has been used clinically for over 30 years and is supported by an extensive evidence base. Risks are limited to temporary sensitivity and, in cases of overuse or improper application, transient gum irritation.

Can I get tooth whitening on the NHS?

No. Tooth whitening is classified as a cosmetic procedure and is not available on the NHS. All professional whitening treatments in the UK are provided privately.

How white will my teeth get?

This depends on your starting shade, the type and severity of staining, and the treatment method used. Most patients achieve a four to eight shade improvement using the Vita shade guide. Patients with severe intrinsic staining, such as tetracycline discolouration, may see more modest results and may be better suited to veneers or a prolonged home whitening course.

Will tooth whitening work on my crowns or veneers?

No. Whitening agents have no effect on porcelain, ceramic, or composite resin. If you have crowns, veneers, or bonding in visible positions, your dentist will discuss your options, which may include replacing those restorations to match a newly whitened shade.

Is over-the-counter whitening worth trying?

Over-the-counter whitening strips and gels are legally capped at 0.1% hydrogen peroxide in the UK, compared to up to 6% in professionally supplied products. They can reduce very superficial surface staining and are useful for maintenance, but they are not capable of producing the same result as a professionally supervised course of treatment.

How long after whitening can I eat and drink normally?

Most dentists recommend a 48-hour “white diet” after in-clinic whitening, during which you avoid strongly pigmented foods and drinks, including coffee, tea, red wine, curry, and berries. After home whitening sessions, the same principle applies during the treatment period, though with a shorter abstention window of two to four hours after each tray session.

Can I whiten my teeth if I have sensitive teeth?

Yes, in most cases. Patients with pre-existing sensitivity should inform their dentist before treatment begins. A desensitising protocol, typically using potassium nitrate toothpaste for two weeks prior to whitening, significantly reduces the likelihood of discomfort. Your dentist may also recommend a lower concentration gel or shorter tray wear time.

Should I whiten my teeth before or after Invisalign treatment?

Most clinicians recommend whitening after Invisalign treatment is complete, so that the final whitening is applied to teeth that are already in their corrected positions. Whitening during Invisalign is possible but less efficient, as the aligners may interfere with tray placement if home whitening trays are also being used simultaneously.