Scoliosis Surgery Involving Spinal Instrumentation

Description

Posterior thoracolumbar vertebrae are aligned with bilateral pedicle screws connected to long longitudinal rods that span multiple segments across the apex of a scoliotic curve. Screw heads sit posterolateral to the spinous processes, anchored through the pedicles into the vertebral bodies, while the rods run parallel to the midline along the dorsal aspect of the spinal column. Cross-links and segmental connectors are visible between the rods, reinforcing the construct across adjacent levels. Hardware dominates the frame. Segmental pedicle screw fixation is a mainstay of modern scoliosis correction because it offers strong three-column purchase and controlled deformity correction across coronal and sagittal planes without relying on hooks or sublaminar wiring. Surgeons and trainees often struggle with the spatial relationship between pedicles, transverse processes, and the spinal canal, and this illustration helps by presenting the screw trajectories as they relate to the posterior elements and vertebral segmental anatomy in one fixed perspective. Malpositioned thoracic screws risk medial breach toward the spinal cord or lateral breach toward the pleura, while lumbar breaches can threaten nerve roots and the great vessels anterior to the vertebral bodies, making pedicle orientation and segment selection a practical teaching point rather than an academic one. Use this illustration for orthopedic and neurosurgical education on posterior spinal fusion, including lectures on adolescent idiopathic scoliosis, adult degenerative scoliosis, and revision instrumentation planning. It also fits operative technique manuals and patient-facing materials that need an accurate visual explanation of rods, pedicle screws, and multilevel constructs across a corrected spinal segment. Anatomical accuracy verified by SciePro's Medical Advisory Board.