| 摘要 |
An anchoring element (1) which is intended to be screwed into a hole made in dentine comprises a threaded part with a conical portion (3) and also one or more recesses (5, 6, 7) in order to form a cutting edge (8, 9, 10) in each recess. Thread-turn parts (17-21) starting from each cutting edge are lowered vertically (f) at the rear where they merge with a relief surface (14, 15, 16) arranged at a distance from each cutting edge. The relief surface is arranged on the conical portion (3) where it extends essentially parallel to (coincides with) a plane (15) tangential to the conical portion (3).
|
