Effectiveness and Safety of Preoperative Halo Gravity Traction-Assisted Posterior Spinal Fusion Surgery for Severe and Rigid Scoliosis: A Comparative Matched-Cohort Study

Figure 2

Surgical image of a patient undergoing correction with PCO technology. (a) Insert pedicle screws on the concave side of the curve. (b) Pedicle screws were implanted on the convex side of the curve. (c) Perform multilevel PCO osteotomy in the main curve area. (d) Implant a prebend rod on the concave side and use the derotation technique for correction. (e) Implant another rod on the convex side and further correct deformity through the compression, distraction, and derotation technique.