Fig. 12.1 An AP view of the left and right SI joints (SIJs) after fusion using a direct posterior approach and fixation with trans-SIJ screws. Note that the right SIJ…

Fig. 8.1 Inlet view Fig. 8.2 Outlet view Fig. 8.3 Lateral view Pelvic Outlet View: This view is a cephalad projection of the sacrum [10]. This view is very important…

Fig. 10.1 Preoperative axial CT showing the cephalad-most margin for total cage containment. Also shown is the measurement from the tip of the PSIS to the anterior aspect of the…

Fig. 7.1 AP intraoperative image of sacroiliac joint showing two “confusing” joint lines There is a basic fact about the orientation of the joint that has been relatively constant and…

Fig. 5.1 Osteoarthritis of the sacroiliac joint demonstrating spurring, sclerosis, joint widening, and vacuum sign Fig. 5.2 Advanced osteoarthritis of the sacroiliac joint involving entire joint with resultant increase in…

Fig. 3.1 Transverse sections through the (a) anterosuperior, (b) middle, and (c) posteroinferior aspects of the sacroiliac joint. The arrows indicate the joint plane orientation of the right sacroiliac joint….

Fig. 13.1 AP X-ray of previous lumbosacral instrumented fusions Fig. 13.2 Lateral X-ray of previous instrumented lumbosacral fusions Fig. 13.3 Image guided diagnostic injection verified diagnosis The patient noted significant…

Fig. 11.1 Smith-Petersen transiliac approach for sacroiliac arthrodesis. (a) Incision and window in original description. (b) Exposure of lateral ilium and subsequent modification of transiliac bone window into synovial portion…

Fig. 14.1 Incision sites for various surgical approaches to the sacroiliac joint (used with permission from Borgess Health) Knowing which tissues were interrupted, and in some approaches reapproximated, is essential…