Bone stabilizing implants and methods of placement across si joints

A threaded bone stabilization implant adapted for placement across a sacro-iliac (“SI”) joint, comprising:

• an elongate body having a distal end and a proximal end;
• the elongate body including a threaded multi-lead distal region, a threaded single-lead central region disposed proximally of the multi-lead distal region, and a threaded multi-lead proximal region disposed proximally of the single-lead central region;
• the body having a length, and the threaded multi-lead distal region, the threaded single-lead central region, and the threaded multi-lead proximal region each having individual lengths such that when the implant is laterally implanted across a SI joint, the multi-threaded distal region is positioned in a sacrum, the single-lead central region is positioned across the SI-joint, and the multi-lead proximal region is positioned in an ilium,
• wherein the elongate body further comprises a plurality of helical flutes formed therein, each of the plurality of helical flutes extending in the multi-lead distal region, the single-lead central region, and optionally into the multi-lead proximal region,
• wherein each of the plurality of flutes has a plurality of fenestrations aligned with the respective flute, the plurality of fenestrations spaced from each other along a length of the flute and extending into an elongate body central lumen, and
• wherein each of the plurality of fenestrations has a radially inward taper.