J Korean Neurosurg Soc.  2015 Dec;58(6):534-538. 10.3340/jkns.2015.58.6.534.

Usefulness of Simple Rod Rotation to Correct Curve of Adolescent Idiopathic Scoliosis

• Kim JY
• Song K
• Kim KH
• Rim DC
• Yoon SH

• KMID: 2151155
• DOI: http://doi.org/10.3340/jkns.2015.58.6.534

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+/-8.5degrees vs. 9.3+/-6.7degrees (p<0.001) and the Coronal Cobb's angle was 53.7+/-10.4degrees vs. 15.4+/-6.5degrees (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.
CONCLUSION
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.

Keyword

Adolescent idiopathic scoliosis; Simple rod rotation; Direct vertebral derotation; Neurosurgery

MeSH Terms

Adolescent*
Classification
Follow-Up Studies
Humans
Male
Neurosurgery
Scoliosis*
Tomography, X-Ray Computed

Figure

• 

  Fig. 1 Plain radiographs and CT images of a 16-year-old girl demonstrate the scoliotic curvature of the spine. A and C : Lenke classification is 1C. Coronal Cobb's angle between T4 of the proximal end of the vertebra and T12 of distal end of the vertebra were at 53 degrees. B and D : Scoliotic curvature had been corrected after surgery. E and F : Preoperative axial CT image demonstrated about a 20 degrees rotation angle, preoperatively. The rotation angle was corrected at about 10 degrees after surgery. The correction rate was about 50%.

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