Tooth Whitening Tips and Tricks
09 Aug 2017

Tooth Whitening Tips and Tricks

Tooth whitening:   Bleaching

09 Aug 2017

Tooth whitening:


Bleaching teeth is very fashionable in this day and age. Here at Blackrock Clinic Dentistry, we are asked on a daily basis about how safe is tooth whitening. Patients want to know about all the products on the market and which ones actually work.

We would like to give a summary on tooth whitening and some of the products available and which ones we like.


In –house bleaching by the dentist:


We advise for best results to wear them for over 3hours per day or overnight. You will only a quarter fill your bleaching tray but this will be demonstrated by the dentist. Ensure to wipe your gums after placing your trays on the teeth. Our patients, usually achieve 3-4 shades whiter teeth but this could vary depending on the shade of your teeth at initial consultation. The dentist will discuss this with you. Call Blackrock Clinic Dentistry now on 01 206 4218 or email


  • This is a safe, effective way of whitening your teeth. 90% of patients will get to the shade they are happy with.
  • This is the most common form of whitening your teeth. It involves taking impressions of your teeth and custom made trays are fabricated. The trays are very easy wear and thin so one can sleep with them in easily.
  • The bleach will contain 6% hydrogen peroxide.
  • We would recommend : Post bleaching, rinse your mouth with water and wash out your trays with cold water.
  • Wait for 30 minutes before brushing your teeth. Avoid any fruits or acidic drinks for at least 1 hour but this should be minimized during the bleaching process.

Points to note:

  1. Bleaching your teeth can make them sensitive. If you have a lot of root exposure, then do not bleach your teeth unless under the supervision of your dentist. Your teeth may become sensitive after a few days of bleaching, then STOP, take a 1-2 day break. If they continue to be sensitive, then contact Blackrock Clinic Dentistry about the next steps. You likely will have to stop bleaching your teeth for now. This is rare with the current level of bleach we now use.
  2. When bleaching your teeth, avoid smoking, red wine, coffee, curry or any other dark foods that stain teeth.
  3. Use sensodyne – repair and protect or complete protection for 2 weeks prior to bleaching. Blackrock Clinic Dentistry recommends to also use sensodyne during the bleaching process if your teeth are anyways sensitive. If you find your teeth are painful post a bleaching session, then you can place sensodyne toothpaste into your bleaching tray for 1 hour.
  4. You should not bleach your teeth under 18.
  5. Bleach will not whiten composite (white) fillings/ crowns/veneers/bridges/etc…
  6. Bleaching teeth can make them slightly more porous meaning they could take up stains more easily in the future.


Whitening toothpastes:


Verdict: They will give a better glow to your teeth and they can make your teeth look whiter.

Points to note:


  1. Whitening toothpastes, in general, do not actually whiten teeth. They can remove stains etc,.. They can make the teeth look whiter in different lights.
  2. Whitening toothpastes can also make your teeth sensitive so we advise not to use if you have sensitive teeth in general or root exposure. If your teeth have starting becoming more sensitive since using a whitening toothpaste, then stop. Please find the below article


Whitening Strips


Verdict: They are easy to use for short periods of time. They will brighten up your teeth but we advise use these for a “top up” post bleaching with the trays. They may not give a uniform white result.

Points to note:

  1. There are numerous whitening strips on the market offering different levels of bleach. Obviously the stronger the bleach, the more chance of whitening your teeth. However this will also increase the risk of sensitivity. It takes approx. 7 days to see the results.
  2. Whitening strips can also make your teeth sensitive so we advise not to use if you have sensitive teeth in general or root exposure. If your teeth have starting becoming more sensitive since using a whitening toothpaste, then stop.
  3. Whitening strips will not whiten white fillings, crowns, bridges,etc.

Should I bleach my teeth if I have receding gums?


  1. The answer varies. It depends on how severe your receding gums are. It depends if your teeth are sensitive. There are different strengths of bleach and it may be possible to bleach your teeth and avoid the root surfaces of your teeth that are exposed due to your receding gums. It really is case dependent and we advise not to bleach your teeth if you do have receding gums unless you discuss it with your dentist.

For more information, please call Blackrock Clinic Dentistry on 01 206 4218.

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