Patent ID: 8491637

Claim:
A rod-shaped implant element for connecting at least two bone anchoring elements, each bone anchoring element having an anchoring section to be anchored in the bone and a receiver member to be connected to the rod-shaped implant element, the rod-shaped implant element comprising: a tubular body having a longitudinal axis and comprising: a first rigid section; a second rigid section; a flexible section between the first rigid section and the second rigid section, the flexible section having a predetermined length in a neutral position; and a bore extending along the longitudinal axis and through the first rigid section, the second rigid section and the flexible section; and a core accommodated in the bore, the core having two opposite ends, wherein the entire core is freely movable in a direction of the longitudinal axis relative to the tubular body when the flexible section is in an extended condition and a compressed condition in the direction of the longitudinal axis, the extended condition and the compressed condition being relative to the neutral position.