Post space
A vital tooth may have insufficient tooth substance to retain a jacket crown so the tooth may have to be root-treated and restored with a postretained crown (Fig. 9).
Overdenture Decoronated teeth retained in the arch to preserve alveolar bone and provide support or removable prostheses must be root-treated.
Root treatment should be considered for any tooth with doubtful vitality if it requires an extensive restoration, particularly if it is to be a bridge abutment. Such elective root canal treatment has a good prognosis as the root canals are easy to access and are not infected. If the indications are ignored and the treatment deferred until the pulp becomes painful or even necrotic, access through the crown or bridge will be more restricted, and treatment will be significantly more difficult, with a lower prognosis.