Patent ID: 7879036
Filing Date: 2011-02-01
Classification: A61B

Abstract:
1. A bone anchoring element comprising: a tubular body for anchoring in a bone and having two open ends; a cylindrical shaft inside the tubular body and assembled to the tubular body, and at least one barb element cut into the tubular body, the barb element having a free end and a base connecting the barb element to said tubular body, wherein the barb element has a first portion adjacent to the base and a second portion adjacent to the free end, and the second portion is inclined relative to the first portion in a direction radially outward from the tubular body; and wherein the barb element is bent at a bending line which is nearer to the free end than to the base, the first portion of the barb element extending from the base to the bending line and the second portion of the barb element extending from the bending line to the free end; wherein the first portion of the barb element is parallel to the longitudinal axis of the tubular body in an unbiased first position radially spaced apart from the cylindrical shaft when the cylindrical shaft is inside the tubular body; wherein the first portion of the barb element is movable from the unbiased first position to a biased second position wherein the first portion contacts the cylindrical shaft; and wherein the first portion of the barb element is elastically deformed in the second position.