Root canal therapy may be necessary if the tooth nerve becomes infected or
damaged pulp from the inside of your tooth root when there is no way to treat the
infection or repair the damage.
The infection is usually from untreated decay that has spread, although the pulp can
also suffer damage from trauma or extensive dental work on the tooth. Fortunately,
an adult tooth can still function without pulp, which is why dentists say root canals
Typically root canal therapy is done over two to three visits. The first is to prepare
and clean the canal space and dress the canal space with a medicament.
At the second appointment the medicament is cleaned from the canals and the
space is filled with gutta percha (a type of rubber). In most cases, once the root canal
therapy is complete a crown is necessary to protect the tooth from fracture.