There are many reasons why your teeth lose their beautiful whiteness. 

The most common reasons for discoloration are:

GENETICS

Normal teeth may be very white or even have a pale undertone of yellow, brown or grey, or may be severely stained,

it depends on your genes. Some visible discoloration due to genetic dental abnormalities generally occurs in tooth's

"dentin," the material that lies beneath a tooth's enamel surface. These stains can sometimes be improved by teeth 

whitening and sometimes not.

PHYSICAL CAUSES

 Surface teeth staining causes.

Everyday wear and tear and illness can also cause teeth to stain. Regular use of cola drinks, medications, coffee,

cigarettes and other tobacco products may cause surface staining, however, people with this normal kind of teeth

discoloration are good candidates for teeth whitening, except in specific instances. 

Tetracycline stains are dark, and the surprise for dentists that haven’t treated this much is that the deeper they go

into the tooth, the darker the stain gets. Ordinary teeth whitening solutions don’t always have a good effect. It is

fortunate that our BriteWhite System is able to treat these stains. Tetracycline teeth are often hard to whiten but as

this photo shows you will see improvement with our BriteWhite system.