Patent ID: 6953462

Claim:
An anchor which is implantable into a bone in a patient's body and, when implanted, is resistant to toggling in the bone and to being pulled from the bone, said anchor comprising: a head end portion having a surface that extends transverse to a central axis of said anchor and is engageable with the bone; and a plurality of helical spikes extending from said surface on said head end portion of said anchor and are engageable with the bone, each of said plurality of helical spikes having a helical central axis that forms a helix around said central axis of said anchor, each of said plurality of helical spikes further having a circular cross-sectional configuration as viewed in a plane extending perpendicular to said helical central axis of each of said helical spikes and having a distal end portion with a tip that penetrates the bone as said head end portion is rotated relative to the bone; each helical spike of said plurality of helical spikes being formed separately from said head end portion of said anchor and having a proximal end portion which extends through said surface on said head end portion of said anchor into an opening in said head end portion of said anchor.