Sacroplasty Procedure

Description

Sacrum and posterior pelvic ring anchor the frame, with the sacral alae flanking the midline sacral canal and the posterior sacral foramina aligned in paired columns lateral to the fused spinous crests. Inferiorly, the sacrum narrows toward the sacral hiatus and coccygeal articulation, while laterally the auricular surfaces meet the iliac bones at the sacroiliac joints. A trajectory for sacroplasty is implied as access into the sacral ala, positioned to avoid the neural foramina and the central canal. Cement occupies the cancellous bone compartment rather than the cortical margins. Sacroplasty is most often performed for painful sacral insufficiency fractures in osteoporotic patients, and it is also used for sacral metastases or myeloma when mechanical instability and pain limit mobilization. The fixed spatial relationships between the sacral foramina, ala, and sacroiliac joint matter because cement extravasation can track into the foramina or canal, risking radiculopathy in S1 to S3 distributions or, less commonly, cauda equina compromise. Needle placement is unforgiving. By emphasizing bony corridors and the thin cortical boundaries of the alar region, the illustration supports discussion of common approaches (short-axis transalar versus long-axis) and the rationale for keeping cement away from the anterior sacral cortex and presacral vessels. Use this illustration in spine and pain-medicine lectures on vertebral augmentation techniques, in radiology teaching files when contrasting sacral insufficiency fractures with metastatic lesions, or in patient-facing surgical consent materials that explain cement reinforcement of the sacrum within the pelvic girdle. It also fits orthopedic and neurosurgical publications covering posterior pelvic ring stabilization and procedural complications such as cement leakage patterns near the sacral nerve roots. Anatomical accuracy verified by SciePro's Medical Advisory Board.