TOOL APPLICATION POINT WITH ORIENTATION AID FOR SCREW ELEMENTS

摘要

The invention relates to a screw element (10) for fixing bone components and bone fragments, consisting of a shaft (13) with an external thread (17) and a longitudinal axis (103) extending along the shaft (13), thereby defining a distal (102) and a proximal (101) direction, and resulting in a screwing-in direction (110) and an opposing unscrewing direction (120), and having a tool application point (20) extending from radially inside. The tool application point (20) has a concentric central opening (27), there being formed in the wall of this opening (27) at least five tooth profiles (21, 22, 23, 24, 25, 26) directed radially outward (104) and substantially parallel to the screw axis (103), and can be divided, for each tooth profile, into a screwing-in wall (40) in the screwing-in direction (110) and an unscrewing wall (50) in the unscrewing direction (120), wherein the surface of the screwing-in wall (40) is larger than the surface of the unscrewing wall (50).