Most of these are available over the counter (except a few) and they contain peroxide (bleaching agent) in low concentrations (generally around 6-15%).You have to wear these in your mouth for about an hour once/twice a day for a specified number of days. Different brands produce different results. Achieving 3 shades improvement is generally seen. They are comfortable to wear, produce only slight discomfort upon talking and a good economical option for those who wish to achieve whiter teeth.
Gums Whitening
This has been extensively seen via advertising media in recent times. They contain bicarb soda which is also employed in the commercial tooth whitening toothpastes. However, they do not containing any bleaching agent which are regularly employed in most commercial tooth whitening systems which are effective.You need to be chewing these gums for 20 minutes each four times a day for it to show any affect. Any visible whitening signs can take up to four weeks to appear.
Tooth Whitening Pastes
These are available over the counter and cost slightly above your normal toothpaste. They are to be use just like normal toothpaste and claim to have whitening effects. However, many dentists have pointed out that they do not have any significant whitening and are just as good as normal toothpastes. People brushing with whitening pastes many times a day might be doing more damage than good to their teeth.
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