Patent ID: 11925398
Assignee: STRYKER EUROPEAN OPERATIONS LIMITED
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
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.