Spinopelvic Fixation Shown In Anatomical View

Description

Spinopelvic fixation hardware spans the posterior elements of the lower lumbar spine and sacrum, bridging the lumbosacral junction to the pelvis. Pedicle screws anchor within the lumbar vertebrae and sacral promontory region, connected by longitudinal rods that run inferiorly toward the posterior superior iliac spine region, where iliac fixation points are typically placed to gain purchase in the ilium. The construct sits posterior to the vertebral bodies and anterior to the overlying paraspinal musculature, aligning along the midline spinous processes with paired, bilateral symmetry. Metalwork dominates the field. Spinopelvic constructs matter when S1 purchase alone is insufficient, such as long-segment thoracolumbar fusions terminating at the sacrum, high-grade spondylolisthesis, pelvic obliquity in neuromuscular scoliosis, traumatic sacral fractures with spinopelvic dissociation, or reconstruction after tumor resection. This illustration emphasizes the relationship between lumbar pedicle screw trajectories, sacral fixation points, and the pelvic anchor sites, which is where load transfer and failure patterns (rod fracture, screw loosening, pseudarthrosis at L5 to S1) commonly concentrate. The posterior, hardware-forward perspective supports quick identification of construct components without distraction from anterior visceral anatomy. Orientation is unambiguous. Use this illustration in spine surgery atlases, orthopedic and neurosurgical resident teaching on sacropelvic fixation options (iliac screws versus S2-alar-iliac pathways), and biomechanics figures discussing sagittal balance and lumbopelvic stability. It also fits patient education materials for postoperative counseling about instrumented fusion across the sacrum and pelvis. Anatomical accuracy verified by SciePro's Medical Advisory Board.