The results of the whitening procedure of your teeth will depend on the present condition of your teeth. The current state of your teeth, genetics and stains all affect the results of the whitening treatment session. For most patients, the teeth are 7-10 shades lighter after the treatment, while in a small percentage of people it can go as high as 10-15 shades. Please be aware that these are only generalised results based on the treatment of a cross-section of patients. As the tooth condition varies greatly between different patients, the results of whitening may also differ. Check with your dentist for a qualified opinion.