Root canal treatment or endodontic therapy is an effective and safe treatment for teeth that have an inflamed or infected nerve.  Once the nerve is irreversibly inflamed or infected, this is the only way to save your tooth from being removed. 

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Once the canal where the nerve or infected tissue resides is cleaned and disinfected, it is dried and sealed.  Most posterior teeth that have undergone endodontic therapy will require a full coverage restoration such as a crown to protect the cusps from fracture.  Anterior teeth may or may not need full coverage restorations after root canal therapy depending on the amount of tooth structure lost.

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Some root canal treatments may be completed in one visit, but others, such as in necrotic (non-vital) teeth may require two or more visits to complete the treatment.