A post and core is a type of dental restoration used either to stabilize a weakened tooth or provide an anchor for a crown. Utilized when inadequate tooth structure remains to support a traditional restoration, it consists of the insertion of a small Metal post or a translucent Fiber Post into the root space of an affected tooth, leaving several millimeters protruding. The protrusion is then used to support a large filling, or anchor a crown.

A post and core treatment is not required for every Root canal treated tooth, but the ones which have lost more than half of their crown structure definitely do.