title: Usefulness of Simple Rod Rotation to Correct Curve of Adolescent Idiopathic Scoliosis.
abstract: OBJECTIVE
  To correct apical vertebral rotation for adolescent idiopathic scoliosis (AIS), direct vertebral derotation (DVD) or simple rod rotation (SRR) might be considered. The aim of the present study is to introduce the surgical experiences of AIS by a Korean neurosurgeon and to evaluate the effectiveness of SRR for apical vertebral rotation.
  
  
  METHODS
  A total of 9 patients (1 male and 8 females) underwent scoliosis surgery by a neurosurgeon of our hospital. The Lenke classifications of the patients were 1 of 1B, 2 of 1C, 1 of 2A, 1 of 2C, 3 of 5C and 1 of 6C. Surgery was done by manner of simple rod rotation on the concave side and in situ coronal bending. Coronal Cobb's angles, vertebral rotation angles and SRS-22 were measured on a plain standing X-ray and CT before and after surgery.
  
  
  RESULTS
  The mean follow up period was 25.7 months (range : 5-52). The mean number of screw positioning level was nine (6-12). The mean age was 16.4 years (range : 13-25) at surgery. The mean Risser grade was 3.7±0.9. The apical vertebral rotation measured from the CT scans was 25.8±8.5° vs. 9.3±6.7° (p<0.001) and the Coronal Cobb's angle was 53.7±10.4° vs. 15.4±6.5° (p<0.001) preoperatively and postoperative, respectively. The SRS-22 improved from 71.9 preoperatively to 90.3 postoperatively. There were no complications related with the operations.
  
  
  CONCLUSIONS
  SRR with pedicle screw instrumentation could be corrected successfully by axial rotation without complications. SRR might serve as a good option to correct AIS deformed curves of AIS.
authors.affiliation: Department of Neurosurgery, Inha Univeristy Hospital, Incheon, Korea.
authors.forename: Ji Yong
authors.initials: JY
authors.lastname: Kim
authors.affiliation: Department of Anesthesiology, Inha Univeristy Hospital, Incheon, Korea.
authors.forename: Kyungchul
authors.initials: K
authors.lastname: Song
authors.affiliation: Department of Neurosurgery, Spine and Spinal Cord Institute, Gangnam Severance Spine Hospital, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Kyung Hyun
authors.initials: KH
authors.lastname: Kim
authors.affiliation: Department of Neurosurgery, Anyang TeunTeun Hospital, Anyang, Korea.
authors.forename: Dae Cheol
authors.initials: DC
authors.lastname: Rim
authors.affiliation: Department of Neurosurgery, Inha Univeristy Hospital, Incheon, Korea.
authors.forename: Seung Hwan
authors.initials: SH
authors.lastname: Yoon
keywords: Adolescent idiopathic scoliosis; Direct vertebral derotation; Neurosurgery; Simple rod rotation
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