Compositions comprising injection-molded vaso-occlusive elements (40). A method of producing the vaso-occlusive elements comprises the step of injection molding a polymeric material into a three-dimensional configuration. The injection molded elements include severable junctions (50) detachably connected to a pusher element.La présente invention concerne des compositions comprenant des éléments vaso-occlusifs moulés par injection. Linvention concerne également des procédés de fabrication et dutilisation de ces éléments.