A 'root canal' is the term that refers to the natural cavity or space within the root of the tooth. It is made up of the pulp chamber which lies in the centre of the tooth and provides nutrients and nerves to each part of the tooth and the 'canals' that connect the bottom of the root of the tooth to the pulp chamber. A cavity in the tooth leaves an opening where bacteria can enter and multiply. Left without treatment, these bacteria cause infections of the root canals, killi