An infected tooth will not heal all by itself. The infection will spread without proper treatment and the bone around the tooth will degenerate leading to the falling out of the tooth. In order to treat a tooth that is damaged, infected or badly decayed, root canal that you can get at the best root canal treatment cost is absolutely necessary. The treatment involves cleaning and sealing the infected area inside the tooth as well as removal of the pulp and the nerves and hence once recommended you should not delay the treatment and go for it immediately.