CPC A61F 2/4455 (2013.01) [A61B 17/7055 (2013.01); A61F 2/28 (2013.01); A61F 2/30771 (2013.01); A61F 2/442 (2013.01); A61B 17/025 (2013.01); A61B 17/0218 (2013.01); A61B 2017/0256 (2013.01); A61F 2/4611 (2013.01); A61F 2002/2835 (2013.01); A61F 2002/3085 (2013.01)] | 40 Claims |
1. A composite implant for stabilizing a sacroiliac (“SI”) joint, comprising:
a monolithic inner shank including one or more threads in a distal threaded region; and
an outer sleeve comprising one or more outer threads that are in the same direction as the one or more threads in the distal threaded region of the inner shank, and a plurality of surface growth features that are sized and configured to facilitate at least one of bony on-growth, in-growth, or through-growth, wherein the plurality of surface growth features include a plurality of lattice sections extending through at least an outer surface of the outer sleeve, wherein each of the plurality of lattice section includes pores having dimensions smaller than each of a plurality of outer sleeve fenestrations that extend through the outer sleeve, wherein a set of lattice sections are disposed in a partial helical configuration along the composite implant,
the outer sleeve disposed about a central portion of the monolithic inner shank with at least a portion of the outer sleeve coupled to the inner shank,
the composite implant further comprising a distal anchoring region that includes the distal threaded region of the monolithic inner shank, and a growth region that includes the plurality of surface growth features and that is proximal to the distal anchoring region,
the distal anchoring region better adapted to anchor into iliac bone than the growth region, and the plurality of surface growth features better configured to facilitate the at least one of bony on-growth, in-growth, or through-growth than the anchoring region.
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