Patent ID: 8845702
Filing Date: 2014-09-30
Classification: A61B

Abstract:
1. A bone anchoring element having a shaft for anchoring in a bone, the shaft comprising: a plurality of barb elements; a tubular body defined by a peripheral wall, the peripheral wall defining an interior space of the tubular body extending along a shaft axis from a first end to a second end of the tubular body; an inner body comprising a shaft part and a head, the shaft part configured to be located in the interior space of the tubular body; wherein each barb element comprises a base formed in one piece with the tubular body, opposing side edges extending from the base, and a free cutting edge opposite to the base and extending between the side edges; wherein each of the plurality of barb elements is movable from a collapsed position adjacent to a surface of the tubular body to an expanded position farther from the surface of the tubular body than the collapsed position to define an opening completely through the peripheral wall to the interior space of the tubular body; and wherein the tubular body and the inner body have corresponding engagement elements that prevent rotation of the tubular body relative to the inner body when the inner body is located in the interior space of the tubular body, the head is located outside of the interior space of the tubular body, and the engagement elements are engaged.