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Bleaching is the act or process of removing stains or color by
chemical means using usually OXIDIZING AGENTS. CORONAL bleaching is
the same thing, but carried out within the crowns of PULPLESS teeth,
and often in combination with heat or UV light. The material used
generally is 30% HYDROGEN PEROXIDE. HOME BLEACHING KITS are a
relatively recent addition to products available to the general
public. There are also several types for use in the dental office,
and they all work on a similar principal in which the solution or
gel of the bleaching agent is held on the teeth for a period of
time, which varies from one product to another, in a TRAY or
special form which fits over the teeth. There is a risk of damage
to the health of the teeth and gums with overuse, and the
possibility of the teeth becoming more sensitive is also high.
The results of home bleaching are usually of limited duration,
so the process may need to be repeated, but many people are
satisfied with the results they get. Caution should also be
exercised with existing RESTORATIONS in the mouth, which may be
damaged or bleached at a different rate to the tooth substance.
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