CPC A61B 17/862 (2013.01) [A61B 17/8891 (2013.01); A61B 17/8615 (2013.01)] | 20 Claims |
1. A bone fastener comprising:
a threaded shaft extending from a leading end to a trailing end, the threaded shaft having a central longitudinal axis therethrough; and
a head extending from the trailing end of the threaded shaft, the head having a threaded surface including a helical root,
wherein the helical root continuously becomes closer to the central longitudinal axis moving away from the threaded shaft to a free end of the head.
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