After endodontic treatment tooth crown is weakened, and the restoration of the tooth should be done as early as possible. Endodontists in Iowa use for restoration filling, inlay or crown that completely restore the form and function of the tooth, strengthen treated tooth, firmly close the access to the root canals and prevent them from reinfection. During the restoration of the tooth root access to the channels should be closed with a temporary filling. Endodontists give preference to those orthopedic constructions that will the most tightly cover the tooth to prevent the access of microorganisms in the root canal of the oral cavity. Such crowns are made of electroplating, pressed ceramics, Cad-Cam.