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- W1986053296 abstract "In Brief Study Design. We evaluated the trajectories of atlantoaxial transarticular and C2-pedicle screws in 3 dimensions using computerized tomography. Objective. To compare the anatomic risk for vertebral artery injury associated with C2-pedicle and atlantoaxial transarticular screws. Summary of Background Data. The atlantoaxial fixation technique using C1-lateral mass screws combined with C2-pedicle screws is considered a safer technique for preventing vertebral artery injury than atlantoaxial transarticular fixation. However, few reports have compared the anatomic risk of vertebral artery injury associated with C2-pedicle screws with that of transarticular screws. Methods. A total of 62 consecutive patients with cervical lesions were evaluated using 3-dimensional images reconstructed by a computer-assisted navigation system. We compared the maximum possible diameters of the atlantoaxial transarticular screw and C2-pedicle screw trajectories, and examined whether the maximum possible diameters were limited by the height or width of the bony structure in screw trajectories ≤4 mm in diameter. Results. Mean maximum possible diameters did not differ significantly between the trajectories of 124 atlantoaxial transarticular and 124 C2-pedicle screws. In screw trajectories ≤4 mm in diameter, 57.1% of transarticular screw trajectories were limited by the height of the bony structure, and all pedicle screw trajectories were limited by the width. Conclusions. C2-pedicle screw placement has nearly the same anatomic risk of vertebral artery injury as transarticular screw placement. Preoperative 3-dimensional evaluation may be useful for choosing the best surgical technique. Three-dimensional computerized tomography was used to compare the screw trajectories of atlantoaxial transarticular and C2-pedicle screw placement. C2-pedicle screw placement had nearly the same risk for vertebral artery injury as transarticular screw placement. Preoperative 3-dimensional evaluation may assist in choosing the best surgical technique." @default.
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- W1986053296 date "2006-07-01" @default.
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- W1986053296 title "Comparison of the Anatomical Risk for Vertebral Artery Injury Associated With the C2-Pedicle Screw and Atlantoaxial Transarticular Screw" @default.
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- W1986053296 doi "https://doi.org/10.1097/01.brs.0000224516.29747.52" @default.
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