Tooth whitening can be a very effective and non-invasive way of lightening the natural colour of your teeth without removing any of the tooth surface. It cannot change the colour completely, but may lighten the existing shade.
Professional bleaching is the method usually used. It involves taking an impression or ‘mould’ of your teeth. This is then sent to a dental laboratory for a special tray to be made, which looks like a thin mouth guard.
You then put an active ingredient – usually hydrogen peroxide or carbamide peroxide – into the tray and wear it at night for several days or weeks, depending on the clinical situation. You should consult your dentist before undergoing any tooth whitening procedures.