Root Canal Treatment involves removing the pulp tissue (nerves) from a tooth, followed by placing a filling in the resultant space. This is usually required if a tooth becomes infected due to bacteria/decay, the nerves start to die, or a fracture of the tooth or root occurs. Once the root canal is completed, a filling is used to seal the top of the tooth. In most cases, a dental crown is placed over the top, which provides strength, durability and a natural white appearance.