Sacroiliac Joint Fusion System for High-Grade Spondylolisthesis Using "Reverse Bohlman Technique": A Technical Report and Overview of the Literature.

Objective/background: High-grade spondylolisthesis (HGS) is a complex clinical problem that poses significant challenges to the treating physician. Contentious debate has continued regarding the most optimal surgical approach for these patients. A variety of transsacral and transvertebral techniques have been described in reported studies.