If a single spot on one of your teeth is not cleaned daily, the
remaining bacteria will transform themselves into a sticky
film substance called plaque. The plaque will produce
acids which eat away at the enamel of the tooth and will
eventually cause cavities. When the cavity gets through the
enamel, into the underlying tooth structure (the dentin),
repair or restoration is necessary.
If there is sufficient tooth structure remaining after removal of all
the caries, a filling is placed. There are three types of fillings commonly used: