Smile design at Smile Rooms Windsor
Dentist-prescribed whitening that lasts — without sensitivity, without compromise. The science the high street doesn't use.
What is professional whitening?
Blue-light in-surgery whitening and combined blue-light + tray treatments also available.
Professional teeth whitening uses dentist-prescribed gel and custom-fitted trays to lighten the natural shade of your teeth from the inside — not just remove surface stains. The result is a brighter smile that still looks unmistakably like yours, just refreshed and confident.
Dr. Albert prescribes a clinical-strength gel that's up to thirty times stronger than anything available over the counter, in trays moulded to your exact bite for even, comfortable results. It's the kind of whitening that quietly works while you sleep, and lasts.
Three myths the industry sells
A short, plainly-spoken correction of the three claims that disappoint patients most often.
Blue-light whitening on its own works in one session.
On its own, it doesn't. Much of what you see straight afterwards is dehydration — your teeth dry out under the lamp, then rehydrate over the next couple of days and the brightness fades. The gel does real work, but it needs time. That's why we always recommend combining a blue-light session with custom at-home trays: the session gives you the initial boost, the trays and gel seal the result.
Strips and high-street kits whiten teeth.
They lift surface stains slightly, but the gel concentration (around 0.16%) is too weak to change the actual shade of your teeth. That requires 10–16% prescription gel — and a custom tray to hold it against the tooth.
Whitening damages your enamel.
Carbamide peroxide whitening, when prescribed and supervised, has been studied for over 30 years and shown to be safe for enamel at the concentrations we use. The "damage" myth comes from over-the-counter abuse and unsupervised treatments.
The science, simply
There are two kinds of staining. Extrinsic stains sit on the outside of the tooth — coffee, tea, wine, smoke. A good hygienist visit removes most of these in 30 minutes.
Intrinsic staining is different. It lives inside the tooth — built up over years from food, age, and sometimes medication. No toothpaste, no strip, no scraping can reach it.
The only thing that can is hydrogen peroxide (or its slow-release cousin, carbamide peroxide). It penetrates the enamel, breaks down the chromophore molecules that make teeth look yellow, and lifts the colour from within.
That chemistry only works at clinical concentration — around 10–16% — and only when the gel is held against the tooth long enough for it to penetrate. Which is why custom-fit trays + dentist-prescribed gel works, and 5-minute strips don't.
Where the difference lives
The whitening "market" is really three very different things. Only one is built around the science of how teeth actually whiten — and lasts.
| Smile Rooms Windsor Dr. Albert | High-street kits Strips & generic trays | In-chair lasers Single-session "blue light" | |
|---|---|---|---|
| Active ingredient | 10–16% carbamide peroxide or 6% hydrogen peroxide — dentist-prescribed clinical strength | 0.16% peroxide gel or strips | Hydrogen peroxide + blue-light dehydration |
| Trays | Custom-fit, digitally scanned to your bite — even gel coverage | One-size-fits-all generic trays or strips — often ill-fitting and uncomfortable | No trays — applied in-clinic only |
| Where | At home, overnight or daytime — your schedule. In-clinic combination options available | At home | Single in-clinic session |
| Lifespan | 12+ months, easily refreshed with top-up gel | Days to weeks before fading | Days — most of the result fades as teeth rehydrate |
| Aftercare | Top-up gel + your trays for life — refresh anytime | None | Often requires repeat in-clinic sessions |
Your at-home journey
Whitening happens at home, in your own time. Here's roughly how it unfolds for most patients — gradual, gentle, and easy to track.
You collect your custom-fit trays and a course of dentist-prescribed gel.
A subtle but noticeable brightening — the deeper colour change starts to emerge.
2–3 shades brighter. Stains lifting.
Most patients reach their natural target shade — bright, even, and unmistakably refreshed.
Brightness stabilises. Top up monthly, quarterly, or whenever you want a refresh — your trays are yours to keep.
Real patients, Smile Rooms Windsor
Tooth whitening after Invisalign treatment
Professional home whitening with Invisalign — yellow staining
Professional home whitening with Invisalign — natural shade lift
Individual results vary and are always based on the patient’s wishes. All photos are of Dr. Albert Gajdos’s own patients, displayed with their consent.
Rated 5★ by 380+ patients on Google
A seamless and excellent Invisalign process from start to finish! I cannot recommend Smile Rooms Windsor enough, from its beautiful premises and friendly staff to the excellent care provided. My Invisalign journey has been such a positive one and that's defin…
Dr Albert is amazing. He talked me through every step of the treatment making me feel comfortable. He worked constantly for 5 hours taking hourly five minute breaks which I was grateful for. My teeth look amazing. I was a little overwhelmed when I first saw th…
I just wanted to write a review to thank everyone that I have met along the way with my Invisalign treatment that I have just completed at Smile Rooms Windsor under Dr Albert. From the reception ladies, dental nurses, hygienist and the amazing Dr Albert i rea…
Invest in yourself
Free consultation (£25 refundable deposit). Whitening pairs naturally with composite bonding or veneers — we'll always whiten first.
Custom-fit trays, dentist-prescribed gel, and aftercare guidance — everything you need to reach and maintain your natural target shade.
Extra gel for your existing trays — top up monthly, quarterly, or whenever your smile asks for it.
A short visit + digital scans for your trays. Deposit refundable or put towards treatment.
The detail you'll want
Whitening is the most-asked-about treatment in cosmetic dentistry, and it's the one most clouded by myth. We've answered every question we hear in the clinic, plainly and properly.
Yes. Dentist-prescribed whitening is one of the most researched and safest cosmetic dental treatments available. We use a clinical-strength gel applied in custom trays — and, where it helps, professional in-clinic blue light sessions — completely different from over-the-counter strips or unregulated salon treatments.
Most patients achieve 4–8 shades lighter. We aim for a natural-looking brightness that suits your face — never the artificial, over-bleached look.
Most patients do notice some sensitivity during the treatment — this is completely normal and fades within a couple of days of finishing. It's usually well managed and easily tolerated with a sensitivity toothpaste and the right whitening protocol, which we tailor to you.
We offer both. On its own, we only really recommend a one-off blue-light session if you need a quick boost for something the next day — a wedding, a birthday, a shoot. Even then we would suggest pairing it with custom trays: for £100 more than the in-surgery session alone, you get a result that lasts years rather than days. The light gives you the immediate lift; the trays and prescription gel do the lasting work.
Typically 1–3 years depending on your diet, habits, and whether you smoke or drink coffee, tea or red wine. Top-up gel for your existing trays is inexpensive and simple to use whenever you want a refresh.
Over-the-counter products can only remove surface stains. Professional whitening uses a gel that's up to 30 times stronger and physically lifts the colour of the tooth from within — a fundamentally different and much more effective process.
Yes — almost always. Whitening only works on natural enamel, so we whiten first to set your shade, then design any bonding or veneers to match. The result is a beautifully unified smile.
No — whitening only lifts the colour of your natural enamel, so existing fillings, crowns and veneers won't change shade. Because of this, many patients choose to whiten first and then have any fillings or crowns on their front teeth replaced to match their brighter smile. Restorations on the back teeth are rarely visible and are usually perfectly fine to leave as they are.
Bespoke home whitening is from £349 (trays + a course of gel). Top-up gel from £45. 0% finance available if combining with bonding or veneers.
Not sure this is the right treatment for you? Start with what's bothering you →
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Reviewed by Dr. Albert Gajdos, GDC No. 256157 Last updated August 2026
Next step
A short consultation, a digital scan, then a few weeks at your own pace. Results that last.