South Kensington
- 20 Old Brompton Road, London SW7 3DL
- Open seven days a week
- 020 7183 2362
Treatment comparison · Wimpole Street, Marylebone
Teeth whitening or composite bonding: colour change versus shape change
Whitening and bonding are often mentioned together because both are quick, conservative ways to improve the front teeth, yet they act on entirely different things. Whitening lightens the enamel you already have; it cannot add or move anything. Bonding adds tooth-coloured resin to rebuild a chipped corner, close a small gap or even up a ragged edge; it cannot make the surrounding teeth any lighter. Deciding between them is mostly a matter of naming what bothers you, and quite often the answer is a little of each, in a particular order.
Decision guide
Which is right for you?
Choose Teeth whitening if…
- Your teeth are even and undamaged but darker than you would like.
- You want the lowest-cost, least invasive change available.
- You are happy to wear trays at home for a few weeks and top up periodically.
- You have no crowns, veneers or large fillings on the front teeth, which would not lighten.
Choose Composite bonding if…
- One or two teeth are chipped, short or worn along the edge.
- There is a small gap or an uneven contour you want corrected.
- A single tooth is darker than its neighbours and whitening has not evened it out.
- You want a visible change finished in one appointment.
At a glance
Side by side
| Feature | Teeth whitening | Composite bonding |
|---|---|---|
| What changes | Shade of the natural enamel | Shape, edge and surface of individual teeth |
| Where it acts | Every tooth the tray covers | Only the teeth that are treated |
| Time to result | Two to four weeks of nightly wear | One visit; a set of teeth in a longer sitting |
| Tooth preparation | None | Little or none; enamel is lightly roughened |
| Fee at Wimpole Street | £399 for the Boutique home kit | From £395 per tooth |
| How long it lasts | Around 6 to 12 months before a top-up | Around 5 to 10 years with care |
| Reversible | Fades naturally over time | Resin can be removed or reshaped |
| Maintenance | Occasional top-ups using the same trays | Polishing at hygiene visits; repairs if chipped |
| Best suited to | Uniform yellowing or dullness | Chips, gaps, uneven edges and single dark teeth |
In the chair
What the treatment involves
Teeth whitening
A short assessment confirms the teeth and gums are healthy and records the starting shade. A scan or impression is used to make thin custom trays that hug the teeth and keep the gel off the gums. You take home the trays and syringes of Boutique gel and wear the trays each night, or for a set period during the day, for two to four weeks. The peroxide in the gel breaks down the pigments held within the enamel, so the teeth lighten gradually and evenly rather than in a single jump. A review checks the result against the starting shade, and the trays are kept for future top-ups when tea, coffee or red wine begin to dull the effect.
Composite bonding
Bonding is carried out directly in the mouth, usually without anaesthetic because little or no enamel is removed. The tooth is cleaned, lightly etched and coated with a bonding agent, then composite resin in a shade matched to the neighbouring teeth is applied in small increments. Each layer is shaped by hand and hardened with a blue curing light before the next is added. When the new corner or edge is built, it is trimmed, checked against the bite and polished so it reflects light like enamel. A single tooth takes roughly forty-five minutes to an hour; several teeth are commonly finished in one longer appointment, with a short polish and check a few weeks later.
Fees
Cost and longevity at Wimpole Street
Boutique home whitening at Wimpole Street will be £399, covering the trays, the gel and the reviews. Composite bonding will start from £395 per tooth, so repairing one chipped incisor costs a similar amount to whitening the whole smile, and bonding four or six front teeth adds up accordingly.
The two differ in how long the money lasts. Whitening fades over 6 to 12 months and is refreshed with inexpensive top-up gel in the trays you already own. Bonding typically serves 5 to 10 years, needs nothing more than polishing at routine hygiene visits, and a chip can generally be repaired rather than redone from scratch. Neither involves drilling into healthy tooth, so both leave every later option open.
All prices are indicative and are confirmed in a written treatment plan at your consultation. Fees are the same at every Medical & Dental clinic.
Weighing it up
Strengths and trade-offs
Teeth whitening
Strengths
- Nothing is added to or removed from the tooth
- Lightens all the visible teeth at once
- Lowest fee of any cosmetic treatment
- Gradual change that looks natural
- Trays are reusable for future top-ups
Trade-offs
- Does nothing for chips, gaps or shape
- Fades within a year or so
- Fillings, crowns and existing bonding stay the same colour
- Some people notice cold sensitivity during treatment
- Not every kind of discolouration responds
Composite bonding
Strengths
- Rebuilds chips and worn edges
- Closes small gaps and evens contours
- Finished in a single appointment
- Little or no enamel removed; reversible
- Repairs are straightforward
Trade-offs
- Cannot lighten the teeth around it
- Resin picks up stain over the years
- Can chip if you bite on hard objects
- Charged per tooth, so several teeth add up
- Needs periodic polishing to keep its lustre
FAQ
Common questions
Composite resin does not change colour with whitening gel, so any bonding placed first would end up darker than the newly lightened teeth around it. Whitening first, waiting about two weeks for the shade to settle, then matching the resin to the result avoids that mismatch.
Often, yes. A thin layer of opaque composite across the front surface can mask a darker tooth, particularly after the neighbours have been whitened. Very dark teeth, such as those discoloured after a root canal, may need internal whitening or a veneer for a convincing result.
It will not damage the resin, but it will not lighten it either. If you whiten with existing bonding in place, the bonded areas may look slightly yellow against the new shade and may need to be re-surfaced or replaced to match.
Most people gain several shades over two to four weeks, but the ceiling is set by the natural colour of the dentine beneath the enamel. Whitening restores and brightens your own colour; it does not produce a uniform paper-white, which is usually the point in favour of it looking natural.
Biting nails, chewing pens or ice, and opening packets with the teeth are the usual causes of chips. Heavy tea, coffee, red wine and smoking dull the surface over time. A polish at hygiene visits restores the shine; if a corner breaks, fresh resin can be added in a short visit.
Yes. Whitening and bonding are offered at South Kensington and St Paul’s now, at the same fees and with the same clinicians. If you start whitening at either clinic, the bonding can be done at Wimpole Street once it opens on 1 October 2026, matched to your new shade.
Marylebone, W1
Wimpole Street opens 1 October 2026
Register your interest and we will contact you when the Marylebone diary opens. If you would rather not wait, the same clinicians can see you at South Kensington or St Paul's now.
Related treatments at Wimpole Street
Opening 1 October 2026
Wimpole Street is not yet seeing patients. Until then, please book or call our South Kensington clinic on 020 7183 2362 or our St Paul's clinic on 020 7183 3709. Questions about the new clinic: wimpolestreet@md.co.uk.
Until we open
Need an appointment before 1 October 2026?
The same clinical team already works from two other Medical & Dental clinics. Book at either one now and, if you prefer, move your ongoing care to Wimpole Street once the doors open.
St Paul's, City of London
- 5 Ave Maria Lane, London EC4M 7AQ
- Open Monday to Friday
- 020 7183 3709
