An abscessed tooth is one that has become infected. Tooth
decay is often the culprit; when tooth decay advances deep
into the tooth, it can cause destruction of the pulp, the
core of the tooth. When this happens, the pulp gets infected
and swollen and pus builds up near the jawbone.
Left untreated, infected pulp can cause more serious problems,
including damage to surrounding tissue and bone.
Root canal treatment is the most common form of treatment
for an abscessed tooth. Root canal treatment involves removing
the infected tissue, cleansing and sealing the canal of the
tooth and restoring the tooth with a crown, or cap.