Implant assembly for low profile spinopelvic fixation and sacroiliac joint fusion

A sacroiliac joint fusion implant assembly for use on a pelvic region including a sacrum, an ilium, and a sacroiliac joint defined there between, the sacroiliac joint fusion implant assembly comprising:

• 1) an implant body comprising:
• a) an insertion element comprising an elongate body with a proximal insertion element end and a distal insertion element end, the insertion element adapted to be positioned within the sacroiliac joint, the insertion element comprising an insertion plate including a medial face, a lateral face opposite to the medial face, and one or more bores, wherein:
• i) each of the one or more bores comprises a bore cross-sectional profile and a bore axis situated along a bore centerline comprising a line connecting each additional bore's cross-sectional profile centroids;
• ii) each of the one or more bores is situated on the medial face or lateral face and is directed inward along the bore centerline;
• iii) each of the one or more bores is configured to receive a distal end of an additional orthopedic fastener;
• and
• iv) each of the one or more bores is a blind bore extending partially through the insertion plate to the lateral face or medial face;
• and
• b) an attachment element mechanically attached to the proximal insertion element end;
• wherein the attachment element comprises an anchor fitting formed within the attachment element or mechanically attached to the attachment element, wherein the anchor fitting is configured to overlay a posterior aspect of only one of the sacrum and the ilium when the insertion element is positioned within the sacroiliac joint;
• and
• 2) an anchor comprising a threaded shank and a head, wherein the anchor fitting is configured to receive the anchor inserted within a predetermined range of anchor insertion trajectories so as to anchor the implant body to the pelvic region.