Biomechanical effects of insertion location and bone cement augmentation on the anchoring strength of iliac screw.

摘要: Abstract Background Iliac screw loosening has been a clinical problem in the lumbo-pelvic reconstruction. Although iliac screws are commonly inserted into either upper or lower column, biomechanical effects of two fixations and their revision techniques with bone cement remain undetermined. The purpose this study was to compare anchoring strengths without augmentation. Methods 5 pairs formalin fixed cadaveric ilia mineral density values ranged from 0.82 0.97 g/cm 2 were adopted study. Using 70-mm length 7.5-mm diameter, conventional augmentation sequentially established tested on same ilium as follows: screw, screw. Following 2000 cyclic compressive loading − 300 N −100 N material testing machine, maximum pull-out measured analyzed. Findings average upper, cement, lower, 964 N, 1462 N, 1537 N, 1964 N, respectively. showed significantly higher strength than one ( P  = 0.008). notably increased both screws. positive correlation between value obtained for 4 fixations. Interpretation technique should be preferred choice stabilization surgery; may serve useful salvage loosening; preoperative evaluation quality is crucial predicting fixation