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- W2383751524 abstract "Objective To investigate the causes of breakage, bending and loosening of pedicle screw systems in fixation of spinal fractures of the thoracolumbar segments. Methods Pedicle screw breakage, bending and loosening found in 23 out of 109 cases of fractures of the thoracolumbar segments were studied. The failures included screw breakage in 14（ 20 screws） , dissociation of the rod in 2, breakage of the conjunction rod in 3, loosening and curving in 4 and penetrating the upper end plate in 1. Results The implants failure were resulted from: 1) bone graft was not used and the fusion was incomplete,2) deficiency of the pedicle screw design, 3)overloading of the pedicle screw,4)the degeneration of the intra vertebral disc leads to the loss of the vertebral body heights, 5) delayed implant removal, 6) no thoracolumbar protective brace had been adopted postoperatively. Conclusion Sound fusion by sucessful bone graft, use of rationally designed pedicle screws, correct indication selection,protective brace for postoperative rehabilitation and timely removal of the implant are valuable procedures for prevention of the implant failure." @default.
- W2383751524 created "2016-06-24" @default.
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- W2383751524 date "2000-01-01" @default.
- W2383751524 modified "2023-09-23" @default.
- W2383751524 title "The analysis of postoperative breakage,bending and loosening of pedicle screws in the treatment of spinal fractures of the thoracolumbar segments" @default.
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