Patent ID: 6196842
Filing Date: 2001-03-06
Classification: A61C

Abstract:
An anchoring element adapted for screwing with a tightening torque into a hole made in a bone, the anchoring element comprising a threaded member having an upper cylindrical portion and a lower conical portion, one or more recesses forming a cutting edge in the respective recesses, and thread-turn parts starting from each cutting edge and being lowered vertically at the rear for merging with a relief surface arranged at a distance from each cutting edge to reduce said tightening torque for the anchoring element, each said recess extending into both said cylindrical portion and said conical portion, a cone of the conical portion being defined by bottom parts of said thread-turn parts, and said relief surface being arranged on and confined to the conical portion where it essentially coincides with or extends parallel to a plane tangential to said cone of the conical portion.