A customized acrylic resin shell for fabricating an amalgam core on the coronally debilitated, endodontically treated posterior tooth.

This article describes a technique for fabricating a custom acrylic resin shell that will ensure a properly designed amalgam core for the coronally debilitated, endodontically treated posterior tooth. A few simple procedures result in a core foundation for root protection, an ideal crown preparation, and a more predictable final restoration.