Every one of you will have some preconceived idea about root canals. They have been given poor publicity and have become synonymous with discomfort. Fortunately, most of our patients claim that they could not tell the difference between a root canal therapy appointment and having a filling done. Root canal therapy is just like a deep filling involving the root of the tooth. The area is anaesthetised and the diseased portion is removed. A deep filling material is placed. Remember that a tooth that has had root canal will become brittle and will require a crown for strength.