When the inner tooth, also known as the pulp, is infected due to injury
or decay, a root canal is necessary. A root canal excavates the infection,
preventing it from spreading. Depending on how far along the infection is
determines the impact level of pain or discomfort when dealing with a tooth
infection. New technology has made root canals much more comfortable. If a
dental infection has not yet penetrated the pulp of the tooth, a root canal may
not be needed. An option referred to as pulp capping may be all that is
required to prevent the spread of infection.