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Fig. 3 | BMC Musculoskeletal Disorders

Fig. 3

From: Clinical evaluation of S1 alar screws application in short-segment lumbosacral fixation and fusion for spine infection with severe S1 vertebral body loss

Fig. 3

Case No. 2. A 52-year-old female underwent one-stage posterior surgery of L5-S1 due to a chronic E. coli infection. S1 alar screws were applied in single-segment lumbosacral fusion and fixation. (a–f) Preoperative X-ray, CT and MRI scans showed bone destruction with significant vertebral body loss at L5 and S1. (g, h) Postoperative X-ray images 4 days after the operation showed signs of posterior fusion and fixation of L5-S1 and autologous grafting, screws and rods in good location. (i–j) X-ray images 6 months after surgery showed partial bone fusion between L5 and S1. (k–l) CT images 12 months after surgery showed solid bone fusion between L5 and S1

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