You can choose to have your teeth whitened either at-home or in-practice. With treatment in-practice, your dentist will carry out the whitening for you, and you’ll see results in about two hours. You’ll then need to use a top-up kit, at home, for around a week to ensure the results stay permanent.
With at-home teeth whitening, your dentist will give you a whitening kit for you to apply yourself at home. This takes around two or three weeks to take effect.