| 摘要 |
A screw is provided having an at least partially threaded ( 4 ) shank ( 7 ) and a screw head ( 3 ). An unthreaded section ( 2 ) is provided between the screw head ( 3 ) and the thread ( 4 ). The thread ( 4 ), at least in the distal area of the shank ( 7 ) facing the screw head ( 3 ) is provided with a groove ( 5 ), notch, slot, or the like crossing the thread ( 4 ). |
