Endodontics is a speciality concerned with the treatment of dental pulp. Endodontic treatment becomes necessary to preserve teeth whenever the dental pulp is affected by trauma or a very deep cavity. This treatment concludes with root canal filling and the reconstruction of the tooth with composite resin.

In most cases, so much dental substance will have been removed from the tooth that it will have to be fully covered with a crown or an overlay in order to ensure its survival during mastication and dental function.