Bone anchoring element

A method of using a bone anchoring element, the method comprising:

• inserting a shaft into a core hole prepared in a bone, a diameter of the core substantially corresponding to the diameter of the shaft, wherein the shaft comprises a tubular body having a plurality of barb elements formed as a continuous one-piece part with the tubular body, the barb elements being arranged along at least one helical line around an axis of the shaft;
• and
• turning the shaft after insertion of the shaft into the core hole in any one of a first direction and a second direction being opposite the first direction, the turning of the shaft in the first direction causing the shaft to be moved in an insertion direction deeper in the core hole, and the turning of the shaft in the second direction causing the shaft to be moved in the core hole opposite to the insertion direction;
• wherein the barb elements are moveable between a first position adjacent to a surface of the tubular body and a second position farther from the surface of the tubular body than the first position to prevent the shaft from being pulled out of the core hole.

A bone anchoring element comprising:

• a shaft for anchoring in a bone, the shaft having a tubular body, wherein said shaft comprises a plurality of barb elements, wherein each barb element is formed as continuous one-piece part with the tubular body;
• a head connectable to the shaft;
• a tip connectable to the shaft;
• wherein each barb element is moveable between a first position adjacent to a surface of the tubular body and a second position farther from the surface of the tubular body than the first position;
• and
• wherein the barb elements are arranged along at least one helical line around an axis of the shaft.