Elastic stabilization system for vertebral columns

A vertebral column implant comprising a connecting element and a plurality of bone screws, each screw having a seat in its screwhead for the connecting element, wherein the connecting element is bendable elastically about every axis of its cross-section in such a way that the connecting element can be passed through, or inserted in, the seats of the screwheads, one behind the other, even when the seats are not situated on one and the same axis;

• wherein the connecting element and the seat in the screwhead each have wholly, or in part, a structured surface, in such a way that the structured surface of the seat engages the structured surface of the connecting element, and shifting can be prevented in assembled condition;
• and wherein the structured surface of the seat and the structured surface of the connecting element each has a structure of annular grooves with channels of the grooves being substantially at right angles to the longitudinal axis of the connecting element.