A root canal might be needed if the cause of the toothache is determined to be an infection of the tooth's nerve. Bacteria that have worked their way into the inner aspects of the tooth cause such an infection. An antibiotic may be prescribed if there is fever or swelling of the jaw.
Definition of correspondence for Students. 1  1 : communication by means of letters or e-mail : the letters or e-mail exchanged. 2  2 : agreement between certain things Sometimes there is little correspondence between the spelling and the pronunciation of a word.
3. a collection of objects threaded on a string: a string of pearls. 4. a series of things arranged in or as if in a line: a string of questions. 5. a group of animals, businesses, etc., owned or managed by one person or group: a string of race horses; a string of hotels.