Root canal could mean two different concepts. It can be defined as the inner tooth that sits between the pulp and the roots. It can also be referred to as the removal of infected materials of teeth and elimination of tooth. The canals are equipped with blood vessels that distribute nutrients to teeth. It also helps the nerves in detecting factors such as pressure, heat and cold. There are questions on whether or not it is necessary to remove a nerve when one experiences toothache, but the fact is all the aspects are connected tightly. Nerves may need to be removed in this case. Removing a nerve is one of the stages in root canal therapy.