Nowadays there are several solutions for a bright, white smile which vary greatly from those of ancient times.
One such method is whitening strips.
The latter are made up of polyethylene.
This is a flexible material consisting of hydrogen peroxide.
Humidity is caused when you apply these strips to your teeth and a chemical reaction takes place.
A mild acid is formed which removes some teeth stains.
Before using whitening strips you should visit your dentist.
The latter can identify the causes of discoloured or stained teeth.
When this is done, you could decide which teeth whitening method is best for you.
Brown or grey teeth stains are difficult to remove by whitening strips whereas yellow stains are eliminated more easily by using whitening strips.
When using whitening strips you should take note of the manufacturer’s instructions.
When you know how to use these strips they yield positive results.
However, you should not use these strips always because they can harm the teeth enamel as well as the tissue under the gum.
Moreover, prolonged application of whitening strips causes your teeth to become transparent thus appearing darker.
Also, you should avoid exposing the gums to these strips as this can cause irritation.