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.

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