An improved sacroiliac (SI) joint implant device that comprises a compression screw and an additively manufactured bone matrix that promotes osteointegration between the device and a patient's bone. Specifically, the SI joint implant device will compress the patient's SI joint with the differential between the thread pitch of a distal portion of the device and a proximal portion of the device. As the SI joint implant device is advanced across the patient's SI joint, the smaller pitch on the proximal threads will compress the joint with every turn of the screw. The center section of the SI joint implant will also be sheathed in the additively manufactured bone matrix sleeve that has both the porosity and the structure to promote boney ingrowth.
