Scoliosis Center, Asan Medical Center, Ulsan University College of Medicine, Seoul, Korea.
Department of Orthopedic Surgery, Gil Medical Center, Gachon University College of Medicine, Incheon, Korea.
Yonsei Med J. 2020 Apr;61(4):323-330. doi: 10.3349/ymj.2020.61.4.323.
This study aimed to analyze radiological outcomes in patients with adolescent idiopathic scoliosis (AIS) who underwent posterior correction with high-density pedicle screw-only constructs. We hypothesized that high-density pedicle screw-only constructs in AIS would provide a high correction rate and would facilitate the maintenance of the correction or obviate the loss thereof.
We retrospectively analyzed radiological outcomes over a minimum follow-up period of 5 years in patients with AIS who underwent posterior correction with high-density pedicle screw-only constructs. A total of 124 consecutive patients were included. Demographic data, including age, sex, operated fusion level, numbers of screw, Lenke curve type, Risser stage, and follow-up period were retrospectively collected from electronic medical records and radiological measurements including serial follow-up.
The average number of pedicle screws was 1.96/vertebra. The average curve correction was 48.3% for the proximal thoracic (PT) curve, 83.1% for the main thoracic (MT) curve, and 80.2% for the thoracolumbar/lumbar (TL/L) curve at final follow-up. Use of high-density pedicle screw-only constructs helped achieve excellent correction rates, with no significant loss of correction at final follow-up.
We obtained excellent correction rates of 48.3% for PT, 83.1% for MT, and 80.2% for TL/L curves using high-density pedicle screw-only constructs in AIS, with no significant loss of correction at final follow-up.
本研究旨在分析接受高密度单纯椎弓根螺钉后路矫正的青少年特发性脊柱侧凸（AIS）患者的影像学结果。我们假设 AIS 中高密度单纯椎弓根螺钉固定能够提供较高的矫正率，并有助于维持或避免矫正丢失。
我们回顾性分析了接受高密度单纯椎弓根螺钉后路矫正的 AIS 患者至少 5 年的影像学结果。共纳入 124 例连续患者。从电子病历中回顾性收集了人口统计学数据，包括年龄、性别、手术融合节段、螺钉数量、Lenke 曲线类型、Risser 分期和随访时间，并对包括连续随访在内的影像学测量结果进行了评估。
平均每节段使用椎弓根螺钉 1.96 枚。最终随访时，近端胸段（PT）曲线、主胸段（MT）曲线和胸腰段/腰椎段（TL/L）曲线的平均矫正率分别为 48.3%、83.1%和 80.2%。使用高密度单纯椎弓根螺钉固定有助于获得优秀的矫正率，最终随访时无明显的矫正丢失。
我们使用高密度单纯椎弓根螺钉固定在 AIS 中获得了 48.3%的 PT 曲线、83.1%的 MT 曲线和 80.2%的 TL/L 曲线的优秀矫正率，最终随访时无明显的矫正丢失。
