Within the interior of a tooth there is a system of nerves that enables you to feel heat and cold or tells you that you are biting on something hard. When the nerve is excessively irritated, mostly due to advanced decay, it becomes inflamed and causes pain. The inflamed nerve must be removed and the canal that extends to the root tip has to be cleaned. Of course, the treated tooth needs to be anesthetized to avoid pain. The interior of the tooth is cleaned with tiny round files and flushed with disinfectants. Using modern tools curved channels can be treated to the tip of the canal. After cleaning the cavity is filled and resealed. The applied substances are gained from plants and do not cause irritation or allergies.
The tip of the root is sealed with malleable plastic and the hole created within the tooth replaced with filling to stabilize the tooth. Finally, a crown or bridge can be fixed to the tooth that will provide protection for many years.