Cement augmentation as revision strategy for loosened thick-diameter non-fenestrated iliac screws - A biomechanical analysis.

摘要: Abstract Background Loosened/pulled-out iliac screws can be a challenging complication, as revision opportunities are limited because more distal anchorage is impossible. Insertion of thick-diameter an option in cases with loosened thin-diameter screws. However, this occasionally infeasible patients Therefore, study aimed to biomechanically analyze whether loosened/pulled-out thick regain strong following cement augmentation. Methods Six human pelvis specimens were dissected isolate 12 hemipelves, and 9 × 80 mm implanted. The pullout maneuver was performed followed by augmentation the same screw within hole. After hardening, again. Forces needed for insertion torque measured Findings Cement significantly increased stability, forces required being high 953.23 N (standard deviation [SD] 1070.46 N; median 306.30 N) uncemented 2897.53 N (SD 585.83 N; 2907.81 N) after (p  Interpretation While often achieved using higher diameters, method thickness already place. We demonstrated that increases stability even screws, achieving than before initial pullout. This may cost-effective rapid revision, significant defects no thicker-diameter available.