Coplanar maneuver for AIS Lenke type 1 and 2

• Published in: Journal of Spine Research Vol. 13; no. 10; pp. 1107 - 1113
• Main Authors: Ide, Koichiro, Arima, Hideyuki, Oe, Shin, Banno, Tomohiro, Yamato, Yu, Hasegawa, Tomohiko, Mihara, Yuki, Matsuyama, Yukihiro, Yoshida, Go
• Format: Journal Article
• Language: Japanese
• Published: The Japanese Society for Spine Surgery and Related Research 20.10.2022; 一般社団法人 日本脊椎脊髄病学会
• Subjects: adolescent idiopathic scoliosis; correction maneuver; vertebral coplanar alignment; 思春期特発性側弯症; 矯正手技
• ISSN: 1884-7137; 2435-1563
• DOI: 10.34371/jspineres.2022-1002

Introduction: Vertebral coplanar alignment (VCA) enables three-dimensional deformity correction using pedicle screw for the treatment of thoracic scoliosis. The purpose of this study was to compare the correction rate between VCA and conventional rod rotation maneuver for adolescent idiopathic scoliosis (AIS) in patients with major thoracic curve.Methods: Fifty-four AIS patients with Lenke type 1 and 2 (8 males, 46 females, mean age 16.7 years) who underwent posterior corrective fusion with at least 1 year follow-up were enrolled in this study. According to the correction maneuver, the patients were divided into 2 groups: VCA group (21 patients) and conventional group (33 patients). Radiographic parameters and clinical outcomes were compared between the PCI between two groups.Results: There were no inter-group differences in patient's characteristics, scoliosis type, and operative data. Correction rates of proximal thoracic and main thoracic curve were significantly higher in VCA group in comparison with the conventional group. Thoracic kyphosis formation was also significantly better in the VCA group. On the other hand, no difference was seen in the apical vertebral rotation between two groups. As for clinical outcome, no inter-group differences were observed in Scoliosis Research Rociety-22 revised scores.Conclusions: VCA could achieve significantly better correction of scoliosis and obtain sufficient thoracic kyphosis than rod rotation maneuver in patients with AIS type 1 and 2. However, the correction of rotation is still insufficient even with this technique.