An intramedullary nail system including an elongated nail member comprising a cavity and electrically conductive at least in part, a coil assembly, a first electrode connected to a first pole of the coil assembly and a second electrode connected to a second pole of the coil assembly. To improve such an intramedullary nail system the coil assembly is provided in an end cap assembly that is proximally releasably connected to the nail member and with at least one electrically conductive outer contact surface. At least one section of the electrically conductive outer contact surface forms the first electrode and at least one section of the nail member forms the second electrode.
