2024 Volume 15 Issue 6 Pages 947-952
Introduction: The fenestrated pedicle screw (FPS) has been reported to reduce reoperation rates and the risk of screw loosening in osteoporotic patients. On the other hand, cement leakage has been reported in some cases. The purpose of this study was to examine cement leakage with the FPS.
Subjects and Methods: A total of 42 cases with 168 FPSs between February 2022 and May 2023 were examined. The most common disease was osteoporotic vertebral fracture. The study items were age, sex, level of screw use, and presence of cement leakage. In terms of cement leakage, Type S was defined as leakage from the segmental vein, Type B as leakage from the basivertebral vein, and Type C as leakage from the cortical bone defect, based on previous reports.
Results: The mean age of the patients was 81.0 years, and 19 (45.2%) were male. Cement leaks were observed in 26 of 42 cases (61.9%) and 43 of 168 screws (25.6%). Of these, 37 were Type S, 1 Type B, 4 Type C, and 1 Type S+B. There were no cases of adverse events.
Conclusion: Cement leakage was observed in 25.6% of FPSs. To prevent cement leakage, it is important to check cement hardness and pressure during injection.
In some cases, cement leaks were observed under fluoroscopy, so frequent fluoroscopic confirmation is necessary.
