Surgical Outcome of the Rod Derotation Technique in Adolescent Idiopathic Scoliosis (AIS) Correction

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Pairoj Warachit, MD
Pradit tantammaroj, MD
Chakkraphan Tantrakansakun, MD
Riamjan Thongnoo
Wongthawat Liawrungrueang, MD


Purpose: To evaluate the results of deformity correction in adolescent idiopathic scoliosis (AIS) with spinal column realignment (SmartlinkTM), and determine if it is an effective tool for the deformity correction of adolescent idiopathic scoliosis with a good result.

Methods: We retrospectively reviewed 28 AIS patients. All patients underwent posterior spinal fusion and deformity correction using the rod derotation technique. The patients were aged 12-23 years with a mean age of 16.6 years. The average follow-up time was 3 years. The SmartlinkTM was used for the spinal column realignment. The navigator system and nerve integrity monitor (NIM) were used during the operations.

Results: No patient had a serious complication. For Lenke type 1, the deformity was corrected in the coronal plane for an average of 87%. In Lenke type 2, the deformity was corrected in the coronal plane for an average of 80% in the main thoracic, and 66.0% in the proximal thoracic. In Lenke type 3, the deformity was corrected in the coronal plane of the main thoracic 80% and thoracolumbar/lumbar 82. In Lenke type 5, the corrected deformity thoracolumbar/lumbar average was 90%. In Lenke type 6, the corrected deformity thoracolumbar/lumbar average was 89%, and the corrected deformity main thoracic average was 87%.

Conclusion: The use of the spinal column realignment SmartlinkTM had a good result for the correction of AIS deformities, and it was safe when combined with the O-arm navigator and NIM for nerve monitoring during pedicle screw placement for the correction of AIS deformities.


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