SACROILIAC JOINT IMPLANTS HAVING ANGLED AND/OR ASYMMETRICALLY SHAPED PROXIMAL ENDS FOR ENHANCED ANATOMICAL FIT
A sacroiliac joint stabilizing implant for implanting across a SI joint from a dorsal approach where the proximal end of the implant is configured to match the uneven bony surface at the posterior aspect of the sacroiliac joint where the sacrum protrudes relative to the ilium.
1 . A sacroiliac joint fusion system comprising:
a) a joint implant comprising: a proximal end; a distal end; a longitudinal axis extending between the proximal and distal ends of the joint implant; and a graft window extending non-parallel to the longitudinal axis;
b) an anchor element comprising a proximal end and a distal end, the anchor element configured to be received in the graft window of the joint implant; and
c) a delivery tool comprising:
i) an implant arm comprising an implant shaft extending between a proximal end and a distal end of the implant arm, and a longitudinal axis extending between the proximal and distal ends of the implant arm, the distal end of the implant arm configured to releasably couple to the proximal end of the joint implant;
ii) an anchor arm comprising an anchor shaft extending between a proximal end and a distal end of the anchor arm, and a longitudinal axis extending between the proximal and distal ends of the anchor arm, the distal end of the anchor arm configured to releasably couple to the proximal end of the anchor element; and
ii) a positioning arm coupled with the implant arm at a first end and coupled with the anchor arm at a second end, the implant arm being configured to rotate relative to the first end along the longitudinal axis of the implant arm within a fixed range of rotation,
wherein, when the implant arm is coupled to the first end and the anchor arm is coupled to the second end, a delivery arrangement automatically exists such that the anchor element and the joint implant align in a trajectory such that the anchor element will be received within the graft window upon convergence of the anchor element and the joint implant.