Teeth whitening – Frequently asked questions

How’s it done?

Impressions are taken of your teeth and custom whitening trays are constructed. These are a custom fit for you and are designed in a way to protect your gums making the whitening experience safe. These are checked by your dentist to ensure a good fit. Due to EU restrictions in this are the max percentage is 6% hydrogen peroxide or 16% carbamide peroxide. For the best effect we recommend home whitening for between 30-90 minutes for up to 2 weeks.

What is the bleach used?

At Crowley Dental we use 6% hydrogen peroxide in the form of Poladay. We recommend using this for 2 weeks for between 30-90 minutes a day. This is very safe and we find that it gently lightens the teeth over 2 weeks with only minor sensitivity.

How white do they go?

This is dependent on many factors including lifestyle, diet and smoking status. To optimise your whitening experience, follow our easy to follow guide as to what to do while whitening (link blog on what to do while whitening). A conservative guide as to how much they will whiten is 3-4 shades but can be up to 7/8 shades.

How long does it last?

This is again dependent on lifestyle, diet, smoking status etc but in saying that it can last up to 2 years. The beauty of home whitening is you can top-up your colour at anytime.

Does it hurt?

Approximately 80% of people who whiten will experience some sort of sensitivity. This is usually limited to within a few weeks of whitening and resolves after this. Issues such as gum recessions can increase sensitivity so prior to whitening follow our blog on what to do prior to whitening to ensure your suitability.

Does everything whiten?

No – any dentistry in your mouth such as fillings even white ones, crowns, veneers, bridges etc will not whiten. It should also be noted that any visible root surface will not whiten. The most effective whitening occurs on the enamel of the teeth.