A rod-shaped implant element for the connection of bone anchoring elements includes at least one rigid section that is configured to be placed in a receiver member of a bone anchoring element and a flexible section that is adjacent to the rigid section. The flexible section and the rigid section are...http://www.google.es/patents/US7621912?utm_source=gb-gplus-sharePatente US7621912 - Rod-shaped implant element with flexible section
