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Fig. 2 | BMC Musculoskeletal Disorders

Fig. 2

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. 2

Case No. 1. A 63-year-old female underwent orthopedic revision surgery of lumbosacral fusion due to the complication of L4/5 and L5/S1 lumbosacral chronic pyogenic spondylodiscitis. S1 alar screws were used as substitutes for S1 pedicle screws to enhance biomechanical stability. (a–f) Preoperative X-ray, CT and MRI scans showed bone destruction with significant vertebral body loss at L4, L5 and S1. (g, h) X-ray images 3 days after the operation showed autologous grafting, and screws and rods were in good locations. (i–j) CT images 1 month after surgery showed the implanted bones and the trajectory of S1 alar screws in axial view. (k–l) CT images 19 months after surgery showed solid bone fusion from L4 and S1 without screws loosening

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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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