Instrument failure at the lumbosacral junction showed a trend toward greater frequency in patients with S1 foraminal hooks (6 of 16, 37.5%) than in those with iliac screws (1 of 13, 7.7%); however, the difference did not reach statistical significance (p=0.09).
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Utilization of S1 Foraminal Hooks for Augmentation of S1 Screws in Adult Spinal Deformity Surgery: Comparative Study With Iliac Screws.
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