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Teeth Whitening

Dental practice at 40 Harley Street, Central London

Teeth whitening can make teeth several shades lighter for a brighter smile. Legally, this procedure can only be performed by a dentist or dental professional such as a hygienist. At 40 Harley Street in London, we provide two types of teeth whitening – in-chair whitening and at-home whitening.

  • For at-home whitening, impressions are taken of your teeth in order to make custom-built clear plastic trays that fit closely to your teeth. A whitening gel is used in the trays either overnight or for a few hours a day. This will gradually lighten the colour of the teeth over a period of approximately 10 days.
  • For in-chair whitening, we use Philips Zoom WhiteSpeed. This kind of whitening is especially effective if you have deep discoloration, maybe from years of smoking, drinking wine and coffee, or taking certain types of medication.
  • Philips Zoom WhiteSpeed can lighten your teeth by up to 6 shades.

To enhance results of in-chair teeth whitening further still, the treatment can be used in combination with home whitening trays. Using the treatments together in this way can help to achieve longer- lasting results.

Frequently Asked Questions

About teeth whitening at 40 Harley Street

  1. How white will my teeth be?

    Teeth whitening is an effective way to brighten your smile by several shades. The end result is obviously affected by the colour of your teeth and any staining before treatment begins, but most patients see a significant improvement. The goal is to achieve your optimum natural whiteness.

  2. Is the treatment safe?

    Both in-chair and at-home whitening treatments are safe. There is no risk of damage to enamel or existing fillings. The procedure must only be carried out or overseen by a dentist or dental professional. Whitening will not change the colour of pre-existing porcelain crowns.

  3. How long does Philips Zoom WhiteSpeed in-chair teeth whitening take?

    The process will take about 60 minutes where the teeth are isolated and a gel is applied to the surface of the teeth. This is activated with a special light and will lighten the teeth several shades whiter. We can then ‘top-up’ the whitening with custom-fitted trays in the future.

  4. Does teeth whitening hurt?

    Most patients experience a mild degree of sensitivity when whitening their teeth which is transitory and subsides quickly. In the unlikely event that sensitivity becomes unbearable skipping a night between applications will allow patients to complete their treatment.

  5. Can teeth whitening be used with other treatments?

    Teeth whitening can be the perfect finishing touch for orthodontic treatments such as the Invisalign clear aligner system. It would usually be carried out when the teeth straightening is complete.

*Individual results may vary.

Patient Stories


Read our patients’ success stories to see what teeth whitening at 40 Harley Street could do for you.

I would highly recommend 40 Harley Street practice for anyone requiring specialist treatment. I was made to feel completely at ease from the start. Reception were very efficient, my treatment took less time than expected and the staff were warm and professional. I left with plenty of information about aftercare, feeling confident about my recovery.