Bone plug

A bone plug, for blocking of a canal in a bone, comprising a radially expandable blocking element comprising

• a) an at least nearly solid body, having a height and an average wall thickness along said height, and a continuous axial opening, which body, under axial compression expands in a radial direction, and
• b) locking means to keep the body under axial compression, said means comprising first and second locking elements, in between which the body is positioned,
• i) said first locking element comprising a disc attached to a stem which protrudes through the axial opening of the body, which stem is provided with a number of radial protrusions positioned next to each other in axial direction on the stem, and,
• ii) said second locking element comprising means, positioned around the protruding stem of the first locking element, which may be locked behind one of the protrusions of the stem of the first locking element, whereby the two locking elements may be fixed at various distances to each other,
• the improvement wherein over the whole height of the body the cross-section of the axial opening is equal to or slightly larger than the that of the stem, and the height of the body is at most 8 times the average wall thickness of the body.