Teeth Whitening Process

How it works

  • Incredibly safe under the guidance of a dentist
  • Does not cause any damage to your teeth
  • Custom-fitted whitening trays ensure every angle of your tooth is covered
  • Whitening trays eliminates any inconsistencies
  • Sensitivity following teeth whitening is normal
  • Each session removes years of stains
  • Once stains are gone, it’s easy to maintain

What to expect

Are you thinking of professional teeth whitening but want to know if it works first and what the process is like? Whilst there are different steps for different types of professional whitening, all are very simple and effective at brightening your teeth several shades. Whether you’re administering whitening agents at home or relaxing chair-side at our practice, the process of teeth whitening is the simplest of all the cosmetic dental treatments.

Zoom Whitening process

Wear times differ depending on the product. Expect from 30 minutes to four hours.

  1. Floss and brush teeth
  2. Place a teardrop amount of gel into each tray compartment (larger teeth use a slightly larger drop).
  3. Place the tray containing the gel in the mouth – be careful to keep away from gums. Remove excess gel with your finger.
  4. This is part of the process if you see bubbling within the trays when wearing them.
  5. After whitening, remove and rinse the trays with cold water. Hot water might damage the trays.

Laser tooth whitening occurs chairside at a dental practice and takes 60 minutes to complete. The dentist will paint the formula onto the teeth and cure them with a UV light.

Boutique Whitening process

Boutique By Day: 6% Hydrogen Peroxide

  • 1.5 hours wear time

Boutique By Night: 10% Carbamide Peroxide

  • 4-6 hours wear time


  • Brush teeth, load the whitening tray and load the product.
  • Place whitening trays over teeth and press firmly into place, then push each tooth to disperse the gel.
  • Wear for the allotted time, then remove and clean off any excess gel that may have seeped out of the edge with a tissue or soft toothbrush. Rinse with water.
  • Clean your trays with cool water and a soft toothbrush.

How fast it takes

With teeth whitening, it’s important to understand the process is not immediate, although you can expect a difference after each session. Stains on teeth cannot be removed overnight, and there’s no product on the market, professional or over-the-counter, which can whiten teeth in a few minutes or a day.

It is chemically impossible for any whitening agent to penetrate deep enough into the teeth safely to work this way. Truthfully, the whitening process can take as much as four days, weeks or even months to be effective.

Patients with severe stains must be patient throughout the process and understand that with each session, they’ll get one step closer to a white and brighter smile.

How it works

The process of whitening teeth uses active ingredients like hydrogen peroxide to temporarily open pores in your teeth and lift stains.

Food and beverages like wine, coffee and berries cause stains that are absorbed through pores in your teeth. To get rid of these stains, we follow the same principle by using a whitening formula that’s absorbed by the teeth, which instead pushes out the stains.

Following each whitening session, teeth will naturally remineralise and rehydrate.

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teeth whitening graphic


What patients must consider and be aware of when using professional tooth whitening kits.

  • Contains hydrogen peroxide
  • Harmful when swallowed
  • Avoid exposure to hypersensitive teeth
  • If irritation occurs, discontinue use
  • Consult with a dentist first
  • Avoid exposure of the product to sunlight or heat

Always consult with a dental professional before whitening your teeth – that’s why prior consultations are essential to avoid complications with tooth sensitivity. We’ll work with you to find the system that minimises sensitive reactions and ensure your dental condition is healthy enough to withstand tooth whitening.

Tooth sensitivity is nothing to be concerned about

Tooth sensitivity is hugely common, and it’s caused by genetics, thin enamel or cracked and damaged teeth. When whitening teeth, some patients experience no sensitivity, whereas others will – and it’s completely normal.

The teeth become temporarily dehydrated during the process, reducing their ability to insulate the nerve from any temperature changes.

The effects of tooth sensitivity should disappear within 12-36 hours after whitening, and our dentists will provide post-whitening fluoride treatments to nourish the teeth and promote faster rehydration.

Is teeth whitening procedure painful?

Rest assured, knowing that the teeth whitening procedure does not hurt. The newest professional treatments feature desensitizing agents and neutral-pH bleach, which helps reduce sensitivity and minimises “zingers.”

If you suffer from sensitive teeth, there are ways we can gradually lighten your teeth using less hydrogen peroxide per treatment that improves your reaction and whitens your teeth without pain.

John Bridger
John Bridger
I've been seeing George for over 15 years. One of my best decisions. Teeth needed serious attention and were immediately "rescued". They have been maintained to an excellent level ever since. Fantastic treatment and continuing results.
Mark Young
Mark Young
American 🇺🇸 Pilot with a very busy schedule. Was in London of one of my many layovers summer 2023. Had not been to a dentist in sometime. Was in need of a deep scaling for oral hygiene and start pains of a Carrie. I’m one of those and for all work completed under N20 (Nitrous Oxide Gas) for seems to be only way. He was able to see me and complete this matter swiftly and professionally. Didn’t scare me out of the chair. Recommend this practice and would return on a layover.
Kirsten Alexandria H
Kirsten Alexandria H
One of the best dental experiences I have ever had! Such a caring and confident team of people.
Angie Moyn
Angie Moyn
Thanks for giving me back my smile! 👍😄
Eleni Kyriacou
Eleni Kyriacou
I recently had the pleasure of visiting CapCityDental for a dental cleaning, and I must say, it was an exceptional experience from start to finish. As someone who prioritizes oral health, I've had my fair share of dental appointments, but this one truly stood out. From the moment I walked in, I felt welcomed and at ease, setting the tone for a fantastic dental cleaning session. The moment I stepped into the clinic, the friendly receptionist - Michael, greeted me with a warm smile and efficiently took care of the check-in process. The waiting area was clean, comfortable, and featured modern decor that helped create a relaxing atmosphere. It was clear that the staff at at CapCityDental value professionalism and patient comfort. Dr. George, the senior dental hygienist was a true expert in his field. He took the time to explain the entire cleaning process, making sure I was comfortable and informed every step of the way. Indeed, it did feel like a warm hug. Furthermore, his dental nurse Marilou was just a gem. Her gentle yet thorough approach put me at ease, and I could sense her commitment to delivering top-notch oral care. It's evident that CapCityDental has a team that's passionate about what they do. What truly sets CapCityDental apart was their dedication to personalized care and patient education. The hygienist nurse took the time to discuss my oral health habits and offered valuable insights on how to improve my routine. She answered all my questions patiently, showing a genuine interest in my oral health journey. This level of individualized attention left a lasting impression on me. In conclusion, my dental cleaning experience at CapCityDental was nothing short of outstanding. From the moment I walked in to the moment I left, I felt valued as a patient and confident in the care I received. The professionalism, expertise, and genuine concern for patient well-being were evident throughout. I wholeheartedly recommend this clinic to anyone seeking exceptional dental care in a welcoming and modern environment. I'm already looking forward to my next visit!
Lee Foulger
Lee Foulger
I had emergency root canal with George and team, and subsequent fillings and hygiene. The service and quality of finish was impeccable. Excellent communication and a focus on patient experience puts you at ease from the start. The after care is also excellent. Couldn’t recommend enough.
Sarah Brooks-Wilkins
Sarah Brooks-Wilkins
I have been so incredibly impressed with my experiences at CAP City Dental. George has been so professional, caring and clearly has a wealth of experience within dentistry. I have had a variety of treatments over many years with George and he is the only dentist I have ever come across that has been able to ease my anxiety surrounding dental treatment. The new Austin Friars premises is so well located in the heart of London and it’s actually a tranquil experience to attend appointments.100% recommended!
Chris Jones
Chris Jones
George and his team have been looking after me for almost 10 years now. When George took me on, my teeth were in a very sorry state. Since then George has worked very hard to improve the function, health and look of my teeth. Thanks to George I only require routine checkups and the odd piece of work now. Seeing George has made going to the dentist a breeze and a very happy social occasion! I can’t recommend George highly enough. The best dentist I’ve ever had. Very attentive and caring…with exquisite attention to detail; second to none. I should also mention that the new location in Austin Friars is a lovely calm oasis in the heart of the City. Modern health setting in a historic built environment. Thanks George.
Roslyn 2023
Roslyn 2023
I had a tooth that was causing me severe pain. I was feeling highly anxious because my previous dentist treated the wrong tooth. My childhood orthodontist left me with an occlusion and had taken out too many teeth. I was having trouble finding a dentist who would not only treat my gaps and cavities, but would also provide an unbiased opinion of my previous treatments. After appointments with other clinics, I found Cap City Dental. Dr Druttman, Marilou, Reni and Michael were welcoming. They helped me correct years of problems in just three visits over as many weeks. The team genuinely try to understand what you are trying to achieve. They don’t push you to have work done. I particularly appreciated Dr Druttman’s comprehensive reports in which he provided his professional opinion on what happened and what should happen moving forward. I highly recommend them not only because they make sure you feel comfortable, but provide you with enough information to ensure you can make an informed decision.
Ellie DB
Ellie DB
I've had a brilliant experience of visiting Capcity Dental. Everyone is friendly, the appointments were always convenient and it's a relaxed environment. Plus, the quality of the service is excellent: they are perfectionists, which is exactly what you want! Thank you

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