Spinopelvic Fixation, Posterior View

Description

Spinopelvic fixation spans the lower lumbar vertebrae through the sacrum into the posterior pelvis in a straight posterior perspective. Pedicle screws are seated bilaterally in the lumbar posterior elements, their heads aligned along the dorsal aspect of the spine and linked by longitudinal steel rods that descend toward the sacral midline. At the caudal end, the construct anchors to the sacrum and extends laterally toward the ilium, consistent with iliac or S2 alar-iliac style pelvic fixation, creating a broad base across the posterior pelvic ring. Hardware dominates the field. Bony landmarks remain recognizable around it. Long-segment posterior constructs like this are selected when the lumbosacral junction cannot reliably carry load alone, such as adult spinal deformity with pelvic obliquity, high-grade spondylolisthesis, tumor resection, or unstable sacral fractures. The posterior-only viewpoint is the one surgeons and trainees use when tracing rod contouring, screw head alignment, and the relationship of sacral instrumentation to the midline sacral crest and posterior sacral foramina, where screw trajectory errors can threaten sacral nerve roots. Metallic surfaces are modeled with specular highlights that separate rods, connectors, and screw tulips, which helps when illustrating revision scenarios like rod fracture, pseudoarthrosis at L5 to S1, or the rationale for adding pelvic fixation to reduce distal junctional stress. Orthopaedic spine and neurosurgery educators can place this illustration in modules on posterior spinal fusion, pelvic fixation options, and lumbopelvic stability, pairing it with discussions of sagittal balance and sacropelvic parameters. Medical publishers will also find it suitable for operative technique chapters, device labeling, informed consent materials, and conference posters focused on complications such as screw loosening, implant prominence, or infection following instrumented fusion. Anatomical accuracy verified by SciePro's Medical Advisory Board.