Often when a patient experiences teeth pain it is an indication that there has been involvement of the nerve or pulp within the tooth or an indication that the nerve itself is dead. This can be due to a fracture or crack of the tooth, a cavity that has expanded into the nerve, or a traumatic event involving the tooth. A root canal is a treatment that removes the involved nerve and pulp of the tooth and replaces it with an inert material. In most cases Dr. Williams will recommend that a tooth that has been treated with root canal therapy have a crown placed soon after treatment in order to maintain the strength of the tooth.