US 11,925,398 B2
Orthopedic screw and porous structures thereof
Steven Willis, Midland Park, NJ (US); Steven F. Krause, Oakland, NJ (US); Amir Ali Sharifi-Mehr, Bloomingdale, NJ (US); Brett Traficant, Wyckoff, NJ (US); Erika Corbin, Mahwah, NJ (US); and Lauren Barkauskas, Pittsburgh, PA (US)
Assigned to Stryker European Operations Holdings LLC, Kalamazoo, MI (US)
Filed by Stryker European Holdings I, LLC, Kalamazoo, MI (US)
Filed on Feb. 22, 2022, as Appl. No. 17/677,098.
Application 17/677,098 is a division of application No. 16/263,068, filed on Jan. 31, 2019, granted, now 11,284,927.
Claims priority of provisional application 62/625,541, filed on Feb. 2, 2018.
Prior Publication US 2022/0175431 A1, Jun. 9, 2022
Int. Cl. A61B 17/86 (2006.01); A61B 17/70 (2006.01); A61F 2/28 (2006.01)
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
OG exemplary drawing
 
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.