Related Experiment Video
Updated: Jan 11, 2026
Cone Beam Intraoperative Computed Tomography-based Image Guidance for Minimally Invasive Transforaminal Interbody Fusion
Published on: August 6, 2019
A novel technique for intraoperative coronal alignment assessment in posterior spinal deformity surgery
Jie Cheng1, Tao Xu2, Maierdan Maimaiti2
1Department of Orthopedic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China.
Purpose:
This study aimed to introduce a novel method for assessing intraoperative coronal alignment in posterior spinal deformity surgery and to investigate its feasibility and efficacy in preventing postoperative coronal imbalance (CIB).
Methods:
All enrolled patients underwent posterior spinal deformity surgery, with dot-line method employed to evaluate coronal alignment intraoperatively. Preoperative and postoperative radiographic and clinical parameters were analyzed. Additionally, patients were divided into type A, B, and C preoperatively, and subgroup analysis was conducted to further assess the effectiveness of this new method.
Results:
Of 46 patients with preoperative CIB, 16 were classified as type B and 30 as type C. The prevalence of CIB was 11.70% at the final follow-up. Preoperative main Cobb angle averaged 55.39 ± 28.22° and improved to 15.19 ± 10.65° at the final follow-up (P < 0.05). Preoperative CBD corrected from 23.06 ± 16.77 mm preoperatively to 18.77 ± 14.48 mm at the final follow-up (P < 0.05). SVA was 34.59 ± 22.66 mm before surgery and 20.12 ± 12.21 mm at the final follow-up (P < 0.05). VAS score and SRS-22 score demonstrated significant improvements had at the final follow up (P < 0.05). Subgroup analysis showed postoperative CIB in 2 patients with type A, 4 patients with type B, and 5 patients with type C.
Conclusion:
Dot-line method is a viable technique for intraoperative assessment of coronal alignment in posterior spinal deformity surgery, effectively reducing and preventing postoperative CIB.
