A device and method of forming a gutta-percha tooth canal obturation. The device includes an amount of gutta-percha that is supported by a thermally conductive core. The core and the gutta-percha are both positioned within a root canal. In canal heating of the core heats the gutta-percha proximate an application point thereby improving the ability to compact the gutta-percha to the shape of the root canal and achieve three dimensional obturation preventing reinfection of the canal.