Options for tooth whitening
 Depending
on the whitening treatment selected, some are performed in the
dental office using an in-office whitening system such as laser
whitening. These methods lighten teeth instantly. The same results
may be obtained through dentist-supervised at-home
whitening, but take longer to achieve.
Some whitening systems, which whiten
your teeth while you sleep, work in 10 to 14 days (or more
accurately nights)! Others whiten your teeth from two to four hours
a day requiring three to six weeks to complete.
Also it's important to know that
certain types of stain respond better to different types of
whitening
materials. In such cases, your
dentist may recommend one method over the
other.
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