13Oct 2024
Key Risk Factors Identified for Pedicle Screw Misplacement in Scoliosis Surgery

Key Risk Factors Identified for Pedicle Screw Misplacement in Scoliosis Surgery

The study investigated the risk factors associated with the misplacement of freehand pedicle screws during posterior approach surgery for degenerative scoliosis. A total of 204 patients were retrospectively analyzed, with 2496 screws placed, achieving a 95.07% accuracy rate. The overall misplacement rate was 4.93%, with higher rates observed in thoracic screws (11.11%) compared to lumbar screws (3.22%). Factors such as body mass index (BMI), Hu value, number of screw segments, Cobb angle, and vertebral rotation grade were identified as independent risk factors for screw misplacement (p < 0.05). Notably, the height of the posterior superior iliac spine significantly impacted screw placement in the lower lumbar spine (p < 0.05). Preoperative imaging assessments, including X-ray and 3D CT, are recommended to mitigate screw misplacement in degenerative scoliosis patients.

  • #orthopaedics

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