Teeth Whitening

Many people want to have a whiter brighter smile. There are many reasons why teeth discolour, ageing and certain food and drinks are a common cause of teeth yellowing. To find out why your teeth have discoloured please come and see us for a consultation. Dr Kelleher will evaluate your teeth and discuss treatment options with you.

Laser tooth whitening has become a thing of the past, changes to the law limit the amount of hydrogen perioxide to 6% and now only a dentist can dispense this to you.

For patient this means the safest and most effective way to whiten your smile is to use a home whitening kit, with specially made trays to deliver the whitening gel to the right areas and protect your tissues.

Why Whiten Teeth?

Your smile can make a huge difference to your confidence and self esteem. As we get older our teeth naturally darken and this can be affected by various factors, however this process can be accelerated with staining foods and drinks such as:

  • Black teas and coffee
  • White and red wine
  • Sports drinks
  • Carbonated beverages (dark and light-colored sodas)
  • Berries and other strongly-colored foods
  • Sauces (soy, tomato, curries)

Over time you may feel that your teeth are not as bright as they used to be and after undergoing a cleaning to remove any stains on the outside of your teeth, it may be suitable for you to brighten your smile by using a specially designed Home Whitening Kit.

 How Does it Work?

A home teeth whitening is an easy, non invasive, cosmetic treatment which produces beautiful results. Our technicians make specially designed trays to deliver a specially formulated whitening gel which bleaches the substance of the tooth. This has been proven to have no long term negative effects on the enamel of teeth, on the dentine of teeth or the gums. 

Why Talk To A Dentist First?

Tooth bleaching can make teeth temporarily sensitive -- or be uncomfortable for people who already have sensitive teeth. When used incorrectly, home kits can also lead to burned -- even temporarily bleached -- gums.

Tooth-whitening works best for people with yellow teeth and is less effective for people with brown teeth. If your teeth are gray or purple, tooth bleaching probably won't work at all.

To be sure tooth-whitening is worth your time and money, talk to your dentist before you use an over-the-counter tooth whitening kit.

How white will my teeth go at the end of the treatment?

This depends on a number of factors and results will vary between patients. Generally speaking, we will get your teeth to as white as they were when you were a teenager (sometimes whiter). Our system will get your teeth to as white as they will naturally go. We expect an improvement of 3-4 shades from any treatment. We take an initial shade of your teeth to show the difference at the end of treatment.

How soon will I see results?

Some people get the result they want after 1 session, while most people see results from the whitening procedure within a couple of days.

Does it hurt to have your teeth whitened?

80% of people will get some form of sensitivity with teeth whitening. This is usually mild and normally resolves within 48 hours. The whitening gel we use helps to open up thousands of tiny ‘tubes’ in the enamel, which in turn allows cold to enter the tooth more easily. After teeth whitening treatment, it takes about 24 hours for these tubes to close and during this time people may have some sensitivity to cold foods/drinks.

Is the process harmful to teeth?

NO! The effect on teeth is no different to the effect from commonly ingested foods or regular dental procedures.

Will the gel whiten crowns, veneers or false teeth?

No. The procedure will only remove staining from natural teeth.

If you are planning to have a crown, bridge, filling or false tooth, it is recommended that you first have your teeth whitened. We can then match the shade to your new colour.

What Teeth Whitening System do we use at Mint Dental?

We are always researching the market for the best products availble. We currently use SDI Polanight. It is the official leading tooth whitening treatment in the world as it is supplied to over 100 countries. SDI Polanight has been used by dentists and patients for over 20 years in the UK and Ireland. It is a proven take home patient whitening treatment. Polanight is CE marked and licenced to be sold on prescription only from dentists. 

  • About Pola Night - Pola Night is an advanced take-home tooth whitening system made by the Australian company SDI. The company has introduced the system to markets in North America, Europe, Australia, and South America. Depending on your whitening requirements, we offer Pola Night in two carbamide peroxide concentrations: 10%, and 16%.

  • How does Pola Night help with sensitivity? - The Pola Night gel contains a desensitising agent which acts on the nerve endings, and desensitises them at the pulp-dentin border, in turn minimising sensitivity and maximising patient comfort.

  • How long do I use Pola Night for? - Polanight 10% 2 hrs to overnight, Polanight 16% 90 min to overnight.

  • Where can I get Pola Night? - The Pola Day system can only be purchased at a dental office and will require custom trays. 

  • Whitening Factor - Depending on the concentration you use, Pola Night will provide different whitening results. If you do not have sensitive teeth and want to see significnat results, we recommend going with the maximum concentration.

  • Clinical Trials - Here are some links to clinical trials on SDI Polanight and its results.

Clinical Study - Night Guard Tooth Bleaching

PolaNight vs Home Bleaching - abstract

How Much Does It Cost?

The cost of Teeth Whitening at Mint Dental is €300.

Teeth Whitening Myths


  • You Can Whiten Your Teeth With Baking Soda - This simply doesn’t work and will disrupt the ratio of good to bad bacteria in your mouth.
  • You Can Whiten Your Teeth Rinsing With Hydrogen Peroxide - Hydrogen Peroxide, when it comes into contact with the tissues, causes free radical reactions. These are the same reactions that age living tissue.
  • You Can Use Whitening Toothpaste and Whitening Gum - While these “whitening” toothpastes and chewing gums may have whitening chemicals in them, they are far too weak to have an effect. Whitening chemicals need to be in contact with the teeth for a minimum of 20 minutes in order to affect a color change.
  • Professional Whitening Gel and At-Home Whitening Gel Are the Same - All teeth whitening gels have different levels of carbamide peroxide or hydrogen peroxide, the active ingredient that whitens your teeth. Professional whitening gel tends to be stronger then at-home whitening gel. Which leads me to myth #5…
  • The Strongest Whitening Gel Is the Best - While a stronger whitening gel may speed up the process, the whitening effect may not last as long. It is also more likely to cause pain and sensitivity. Bottom line: You can achieve the same results with lower concentrations of whitening gel, plus it is safer and your teeth stay whiter longer.
  • Once Whitened, Teeth Will Stay White Forever - The color change is permanent, however, the aging process continues, which means your teeth continue to yellow. Touch-ups are needed to maintain the whitening. This is one of the reasons the custom whitening tray method is best.
  • Strawberries and Lemons Can Be Used to Whiten Teeth - True, but at a cost. The way it works is the acids eat away at your teeth enamel. In the end, you can do permanent damage to your teeth if you take this route to whitening your teeth.
  • UV Light Can Speed Up the Whitening Process - There is no proof that a UV light used by a dentist (during in-office whitening) speeds up the process of whitening or does a better job at whitening your teeth. In fact, it may harm the tooth and can damage your eyes, lips, and gums with UV rays.
  • Crowns and Veneers Can Be Whitened - The whitening gels we use to whiten teeth only work on natural teeth and have no effect on porcelain surfaces, so you need to replace your crowns if you want them to match your other teeth.
  • Whitening Can Be Done At All Ages - Whitening children’s teeth can damage the live tissue inside the teeth. 

Don’t become a victim of these common misconceptions about teeth whitening. Your smile is often the first thing people notice about you, so do your research before doing anything to your teeth and always consult your dentist first.