A prefabricated, solid dental substance used in endodontics to fill or permanently obturate the root canal of a tooth. The substance may set without assistance of moisture, and is typically intended for orthograde use (i.e., a root filling placed from the coronal aspect). The device has various metallic or polymeric compositions that include (but are not limited to) silver (Ag), methylmethacrylate, zinc oxide eugenol, glass alkenoate, and calcium hydroxide (Ca(OH)2). It does not include gutta-percha. After application, this device cannot be reused.