Teeth Whitening Frequently Asked Questions (FAQs)

What is teeth whitening and does it really work?

Teeth whitening is a cosmetic dental procedure that lightens the colour of your teeth by removing stains and discoloration. Professional treatments use a peroxide-based gel that penetrates the tooth enamel to whiten your teeth safely and effectively. When supervised by a trained dentist, teeth whitening delivers noticeable and lasting results.

Is teeth whitening safe?

Yes. Teeth whitening performed by certified dental professionals is safe when done correctly. It is illegal for anyone other than a registered dentist, dental hygienist, or dental therapist to carry out professional teeth whitening in the UK. We ensure your treatment is carried out under strict dental supervision.

How is professional teeth whitening different from over-the-counter kits?

Over-the-counter whitening products contain very low concentrations of hydrogen peroxide (typically around 0.1%), which limits their effectiveness. Professional treatments use higher concentrations (up to 6%), but only after a dentist has assessed your suitability. Professional whitening provides more stable, predictable, and safer results without damaging your teeth.

Does teeth whitening cause pain or sensitivity?

Teeth whitening generally does not cause pain, but some patients may experience mild, temporary sensitivity during or shortly after treatment. Our whitening gels include desensitising agents to minimise discomfort. If sensitivity persists, contact us for advice or suitable products to ease it.

Am I suitable for teeth whitening?

Most adults with healthy teeth and gums are suitable candidates. However, if you have untreated dental problems like tooth decay or gum disease, whitening may not be recommended until those issues are resolved. Pregnant or breastfeeding women are advised to postpone whitening.

How does home teeth whitening compare to in-clinic whitening?

Home whitening involves receiving custom-fitted trays and professional-grade whitening gel to use at your convenience over 2–3 weeks. This gradual process is preferred by many dentists because it provides longer-lasting, more stable results. In contrast, in-clinic whitening is a quicker, single-session procedure that typically lasts around two hours, often followed by home top-up treatments to maintain the effect. Both methods are effective when supervised by a dental professional, but home whitening offers the advantage of controlled, sustained whitening with the possibility of easy future top-ups.

Will whitening change the colour of my dental restorations?

No. Teeth whitening only affects natural tooth enamel. Crowns, veneers, fillings, and dentures will not whiten and may require replacement if their colour no longer matches your natural teeth.

How long does the whitening effect last?

Results can last for several years if you maintain good oral hygiene and avoid staining foods or habits like smoking. Typically, periodic top-up treatments every 6 to 9 months help maintain your bright smile.

How white will my teeth become?

The degree of whitening varies depending on your starting tooth shade. Your dentist will discuss realistic expectations based on your teeth. Most patients achieve a noticeably brighter, natural-looking smile.

How long does the home whitening treatment take?

Home whitening usually takes 2–3 weeks of nightly use of custom trays filled with whitening gel. You’ll gradually see your teeth become whiter with each treatment session.