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.
Correspondence courses allow institutions to offer courses without having to hire additional staff. The original correspondence courses were carried out through the postal service. Video conferencing allows students to communicate with teachers in real-time during a correspondence course. Teachers may grade mailed-in assignments from students living in a variety of locations in a correspondence course.