Located at 20 Old Brompton Road – Just Steps from 
South Kensington Tube. Easy Access, Always.
NEW: 5 Ave Maria Lane, City of London, EC4M 7AQ – Opening April 2026
Whitening Comparison
Two popular routes to a brighter smile — but they work very differently. We compare both options honestly so you can choose with confidence.
With so many whitening options available, it is easy to feel unsure about which approach is right for you. Home whitening with custom trays and in-chair laser whitening are two of the most popular professional methods — and both can deliver excellent results. But they differ significantly in how they work, what they cost, and how they fit into your lifestyle.
At Dental Hygienist London, we specialise in premium home whitening because we find it offers a good combination of safety, effectiveness, and long-term value for many patients. Custom trays designed from precise dental impressions ensure even, consistent whitening — and because you keep your trays, top-up treatments are simple and affordable.
Below, we compare both methods honestly — covering speed of results, cost, sensitivity, and suitability — so you can make a fully informed decision. Suitability for any whitening treatment depends on an individual clinical assessment, including the health of your teeth and gums. A professional teeth cleaning is typically recommended before starting whitening for optimal results.
Ready to discuss your options? Book a consultation and we will create a personalised whitening plan tailored to your goals.
Side-by-Side Comparison
Costs are approximate UK ranges and may vary by clinic. Results depend on individual factors including tooth condition, existing shade, and lifestyle habits.
Our Recommended Option
Professional home whitening involves having custom-fitted trays made from precise impressions of your teeth. You then apply professional-grade whitening gel to the trays and wear them for a prescribed period — typically 30 minutes to a few hours daily, or overnight — over a course of two to four weeks. The gel gradually breaks down staining molecules within the tooth structure, producing natural-looking, even whitening.
This is the whitening method we offer at Dental Hygienist London
Based on our clinical experience, we find custom home whitening offers a good balance of safety, comfort, and long-term value — which is why we offer it as our primary whitening service.
Home whitening is ideal for patients who want a gradual, natural-looking result, those with sensitive teeth who benefit from a gentler approach, patients who prefer the convenience of whitening at home, and anyone looking for a cost-effective method with easy long-term maintenance. A clinical assessment is required before treatment to confirm suitability.
Alternative Option
In-chair laser whitening (sometimes called power whitening) is a clinical procedure performed entirely in the dental surgery. A high-concentration whitening gel is applied to the teeth and activated using a specialised LED or laser light. The light accelerates the chemical reaction within the gel, producing visible whitening results in a single 60–90 minute appointment.
Laser whitening may suit patients who need fast results — for example, before a wedding, holiday, or important event — and who prefer having the entire treatment completed in the dental chair rather than managing a home routine. It is generally better suited to patients who do not experience significant tooth sensitivity.
Please note: We do not currently offer in-chair laser whitening at Dental Hygienist London. We can, however, provide expert advice on whitening options and offer our premium home whitening service, which we find can achieve effective whitening results with greater comfort and long-term value.
Detailed Breakdown
Laser whitening delivers immediate results in a single 60–90 minute session — ideal if you need a brighter smile quickly. Home whitening works more gradually over two to four weeks, but many patients prefer this approach as it produces a natural-looking transition and allows you to control the level of whitening.
Both methods can lighten teeth by several shades. Laser whitening often produces more dramatic initial results, but home whitening achieves comparable outcomes over the full treatment course. The final shade depends on your natural tooth colour, existing staining, and individual response to the whitening gel.
Home whitening typically causes less sensitivity because the gel concentration is lower and the process is gradual. Many patients who experience sensitivity can simply reduce wearing time or use a lower-concentration gel. Laser whitening uses stronger formulations and light activation, which can trigger more noticeable temporary sensitivity — particularly in patients already prone to it.
Home whitening fits around your schedule — wear your trays while relaxing at home, reading, or watching television. Laser whitening requires a dedicated clinic appointment of 60–90 minutes. For busy Londoners, the flexibility of home whitening is often a deciding factor.
Home whitening is generally more affordable, with UK prices typically ranging from £250–£500 including custom trays and gel. Laser whitening sessions typically cost £500–£1,200+. Home whitening also offers better long-term value because you can purchase additional gel for top-ups without the cost of repeat clinic sessions.
Results from both methods can last 12–24 months or more with good oral hygiene and sensible dietary choices. However, home whitening has a practical advantage — you keep your custom trays, making affordable top-up treatments simple. With laser whitening, maintaining results typically requires booking additional clinic appointments.
Weighing Up Your Options
UK Pricing
Cost is often one of the most important factors when choosing a whitening treatment. Here is a realistic breakdown of what you can expect to spend in the UK:
£250 – £500
Custom trays + professional gel
Top-up gel from ~£30 per syringe
£500 – £1,200+
Per clinical session
Top-ups require additional clinic appointments
When comparing long-term value, home whitening often comes out ahead. The initial investment includes custom trays that last for years, and additional whitening gel is typically £20–£40 per syringe — making top-up treatments a fraction of the cost of a repeat laser session. Over two to three years, the total cost of maintaining a bright smile with home whitening can be significantly less than laser whitening with clinic-based top-ups.
For our current whitening prices, see full treatment fees. We are always transparent about costs and will discuss pricing at your consultation before you commit to any treatment.
Making Your Decision
Immediate Transformation
→ Laser Whitening
If you need visibly whiter teeth by a specific date — such as a wedding or special event — laser whitening delivers the fastest results. However, be aware of the higher cost and increased sensitivity risk. If your timeline allows two to four weeks, home whitening can achieve effective results with greater comfort.
Controlled, Even Results
→ Home Whitening (Trays)
For a natural-looking, gradual brightening of your smile, home whitening with custom trays is the ideal choice. The controlled, step-by-step approach means you can monitor your progress and stop when you are happy with the shade — avoiding an unnaturally white result.
Gentle, Adjustable Treatment
→ Home Whitening (Trays)
If you have sensitive teeth or are concerned about discomfort, home whitening is typically the gentler option. The lower gel concentration and gradual process are easier on your teeth, and your dental professional can recommend a sensitivity-reducing gel or adjusted wearing schedule.
Affordable Long-Term Value
→ Home Whitening (Trays)
Home whitening offers better value both initially and over time. The lower upfront cost, combined with affordable top-up gel syringes and reusable custom trays, makes it the most cost-effective professional whitening option available in the UK.
Our Recommendation
For most patients, we recommend professional home whitening with custom trays. It can achieve effective whitening results, is gentler on sensitive teeth, costs less, and gives you complete control over the process — with the added benefit of affordable top-ups whenever you need them. Suitability depends on your individual dental health, so we always begin with a clinical assessment.
Our premium home whitening service begins with a thorough clinical assessment and custom tray fabrication. Whether you visit our South Kensington clinic or our dental hygienist city of london practice, you will receive personalised guidance on achieving the smile you want — safely and comfortably.
Common Questions
Our premium home whitening service is designed for patients who want safe, effective, and beautifully natural results. We will guide you through every step — from your initial assessment to your first bright smile in the mirror.
A clinical assessment is required before whitening to confirm suitability. View our fees.
Registered & Regulated
Our dentists, dental hygienists, and dental nurses are all fully registered with the General Dental Council (GDC), and our clinic is regulated by the Care Quality Commission (CQC) (Provider ID: 1-20629579981). We are committed to maintaining high standards of clinical governance, safety, and patient care.
Real reviews from our valued patients
These are selected patient reviews sourced from Google. Individual experiences and results may vary. Reviews reflect personal opinions and should not be taken as a guarantee of treatment outcomes. View all reviews on Google.
Melissa Nereide
Local Guide
Sophia Azzou
Susan Tracey
