Abstract: The invention refers to an implant device, in particular to a pubic symphysis implant device, and to an implant system comprising two such implant devices. The implant device of the invention comprises a bent body comprising a curved middle portion and two lateral arms extending away from the middle portion and being mutually joined by the middle portion, and at least one guiding element defining at least one guiding path along which a tensioning element can be guided. The invention further refers to method of fixating together a first bone or bone part and a second bone or bone part, for example for re-joining a disjoined pubic symphysis, using such an implant system, in particular by placing each of the two implant devices on corresponding bones or bone parts and by pulling the two implant devices towards each other by tensioning a tensioning element guided along the at least one guiding path of each of the two implant devices.