| 摘要 |
The invention relates to a bone screw (1) comprising a longitudinal axis (2) and a threaded shaft (15), which has an external thread (3) of an external diameter D<SB>A</SB>, a front thread end (4) and a thread profil e (11). The latter (11) has a front thread flank (7) that is oriented towards the front thread end, said front flank (7) comprising on its front thread end (4) a flank section (9) that has a 90~ offset in relation to the front thread flan k (7), thus forming a tangential cutting edge (5) on the front thread end (4).
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