Patent ID: 8206454

Claim:
A screw-in element having a self-cutting thread having a thread tooth profile, a peripheral thread rib being divided into thread teeth by at least one flute, and having a nonlinear lateral surface lying in at least one partial area of a thread extension, the thread tooth profile being tilted in a feed direction, wherein the at least one flute intersects the thread teeth at an angle which runs opposite to a direction of a pitch angle of the thread and of angular dimension larger than the pitch angle of the thread to form cutting first edges situated on respective rear flanks of the thread teeth and disposed at an acute angle relative to the rear flanks and second edges situated on respective front flanks of the thread teeth and disposed at an obtuse angle relative to the front flanks, the rear flanks being directed toward an equator of the screw-in element, the front flanks being directed toward the socket pole of the screw-in element, and wherein each cutting first edge of the cutting first edges is formed between the at least one flute and a respective thread tooth of the thread teeth and extends farther in the feed direction than the second edge extends in the feed direction so that each cutting first edge during a screwing-in procedure digs into bone before the second edge contacts the bone.