Robotic-Assisted Fixation and Cementation for Sacral Insufficiency Fractures: A Case Series and Technical Note

Background: The prevalence of sacral insufficiency fractures resulting from minor trauma has been on the rise in parallel with the globally aging population. For similar injuries typical to the elderly population, such as hip fractures, surgery and early mobilization have been shown to improve postoperative mortality and morbidity rates. As such, there has been a recent increase in the literature in studies advocating for early surgical fixation for sacral insufficiency fractures. However, traditional fluoroscopic techniques are technically demanding and bear an inherent complication risk even in experienced hands. Robotic-assisted surgery has emerged as a promising technological advancement in spinal and pelvic surgery. We share our experience with this surgical technique. Methods: We conducted a retrospective analysis of five consecutive patients with sacral insufficiency fractures who failed non-operative management. Using the Mazor X robotic system, patients underwent CT-planned, guided placement of fenestrated sacroiliac screws followed by cement augmentation. Primary outcomes included surgical time, radiation exposure, complications, and mobilization, with a minimum three-month follow-up. Results: The cohort consisted of five females with a mean age of 78 years. The mean operative time was 36 min (15-47), and the median fluoroscopy count was 13 shots (6-19). All patients reported significant pain relief and achieved successful mobilization on postoperative day 1. No operative or postoperative complications were recorded. Conclusions: This pilot study suggests that robotic-assisted percutaneous sacroiliac fixation with cement augmentation is a safe, efficient, and minimally invasive approach for the treatment of sacral insufficiency fractures. The precision of the robotic system facilitates stable fixation, providing immediate pain relief and early mobilization with a favorable complication profile. Further studies should be performed to verify these findings.