When tooth decay is progressed and reaches the pulp tissue, patient experiences pain, because pulp tissue contains the nerve and blood vessels of a tooth. Because the infected soft tissue (pulp) in the tooth is totally encased within hard tissue, tooth pain won’t subside.
Aim of Root Canal is removal of the infected soft tissue located in the root canals, cleanse the area, and finally fill the canals of tooth with an inert material so that bacteria cannot re-enter the tooth to cause another infection and this eliminates the dental pain.
An RCT allows you to retain a tooth in your mouth and serve you for a good many more years. The only other alternative to treating a tooth indicated for a RCT is to remove it (extraction).
Many patients think that removing a tooth is the easy and cheaper way out. However not only are they wrong about it being the shortcut - it generally turns out to be more Expensive too, as removed tooth has to be replaced by either a three unit bridge or an implant.