Rebuilding core foundations for existing crowns using a custom-made template.

This article describes a simple procedure for reproducing the internal contours of existing crowns to rebuild composite core foundations for endodontically treated abutment teeth. In the event of core fracture or recurrent caries under a crown, problems may be encountered when constructing a new dowel and core to retrofit an existing crown to the newly fabricated core. The procedure described in this article involves the use of a custom-made template and plastic foil to fabricate new composite core foundations for existing crowns.