CPC A61B 17/8605 (2013.01) [A61B 17/7032 (2013.01); A61B 17/8625 (2013.01); A61B 17/864 (2013.01); A61B 17/7002 (2013.01); A61F 2002/2835 (2013.01); A61F 2310/00023 (2013.01)] | 13 Claims |
1. A bone fastener, comprising:
a head;
a screw portion extending from the head, the screw portion having a shaft and a thread extending helically along and about the shaft and defining a helical depression therebetween;
a channel extending through the shaft and the head; and
a plurality of porous fenestrations disposed within the helical depression and extending into the shaft, the porous fenestrations being filled with a porous structure configured to promote bone ingrowth, the porous structure comprising a portion of an external surface of the bone fastener and extending to the channel, the porous structure being surrounded by a solid structure having a porosity smaller than that of the porous structure; and
a porous liner at least partially surrounding the channel and being disposed within the shaft of the screw portion, the porous liner having a porous structure interconnected within the porous structure of at least two of the porous fenestrations.
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