Most stains are caused by age, tobacco, coffee,
or tea. Other types of stains can be caused by
antibiotics, such as tetracycline; or too much
fluoride.
A popular method for treating moderately stained
or discolored teeth is bleaching. These stains
often cannot be removed with regular
professional cleanings. The most popular methods
of bleaching are the at-home method and the
in-office method. There are a few good products
out on the market that are dispensed by
dentists.
In-office:
The two most popular types are Zoom (1, 2 and
the latest APL) and gel. They both involve
sitting in the dentist office for about 1.5
hours. The actual bleaching time is 45-60
minutes and you can get 6-10 shades lighter. We
give you trays to use as touch-up for future
use.
At home:
First, the dentist makes a mold of your teeth
and makes a custom mouth tray. The mouth tray
will hold the bleaching material against the
tooth surface without concentrating the agent on
the gum tissue. If the material contacts the gum
tissue to long the gum tissue can be irritated
or even burned. The tray is worn 1/2 hour to 2
hours per day and a noticeable improvement
usually takes place within 2 weeks. Some
bleaching agents say you can wear them all night
but your teeth may get very sensitive after
doing this. You may continue using the product
until you reach your desired whiteness.
Sometimes you cannot achieve the desired
whiteness and will have to settle for something
less. The dentist may have you come in
periodically to check the progress and the
reaction to the gum tissue, if any. After you
have lightened your teeth, you may need to
periodically (once every couple of months)
bleach them for a session to keep the whiteness.
In some studies, patients have experienced
uncomfortable short-term side effects when
having teeth bleached. Hydrogen peroxide can
increase temperature sensitivity in the teeth,
particularly at higher concentrations, and night
guards often cause gum irritation.
And overzealous use of over-the-counter home
bleaching products can wear away tooth enamel,
especially with solutions that contain acid.
Therefore, bleaching is a procedure best done
under the care of an oral health care
professional.
Still, the general health risks of bleaching
systems are minimal as far as your body is
concerned. Applications are controlled so that
you don't swallow hydrogen peroxide.