Abstract
As sufficient study not available in this subcontinent about correction of idiopathic kyphoscoliosis by axial translation technique, a group of patients of Adolescent Idiopathic Scoliosis (AIS) was selected to evaluate the outcome of rod rotation technique. The curve correction with more screw on the concave site was assessed, patient satisfaction and correction of cobb angle. Post operative radiological and functional outcome were assessed. Twenty consecutive patients (8 males, 12 females) with an age range from 10 to 24 years. Post operatively all were followed-up for 18 months. All patients were under went pedicle screw instrumentation through posterior approach. More screw inserted in the concave side. X-ray evaluation done by pre-operative and 1, 3, 6 ,12 and 18 months after surgery. Scoliosis Research Society (SRS) questionnaire was done for clinical evaluation. Radiological evaluation done by preoperative cobb angle was significantly reduced in postoperative period. The mean postoperative SRS scores were improved from 3.38 to 4.13. These results were statistically significant and so it may be concluded that the axial translation technique with more screw in the concave side is ideal technique with good postoperative outcome both clinically and radiologically.
Highlights
Surgical treatment of Adolescent Idiopathic Scoliosis (AIS) has been revolutionized with introduction of various strategies which include: distraction as developed by Harrington, which was followed by the development of segmental fixation which allowed segmental compression/ distraction and latter spine de rotation and translation.[1,2,3,4]
All the 20 patients were available for follow-up for minimum 18 months
The functional outcome, the mean Scoliosis Research Society (SRS) scores and correction percentage are shown in table II
Summary
Surgical treatment of Adolescent Idiopathic Scoliosis (AIS) has been revolutionized with introduction of various strategies which include: distraction as developed by Harrington, which was followed by the development of segmental fixation which allowed segmental compression/ distraction and latter spine de rotation and translation.[1,2,3,4] Each one of this technique have its own advantages and disadvantages. Cotrel-Dubousset (CD) introduced new system in last decade which achieved adequate reduction in frontal, sagittal and transverse planes.[12] Experience with Cotrel and Dubousset (CD) system showed that spine could become unbalanced above and below the construct This disadvantage was overcome by new design universal spine system (USS), in which frame was created by rods fixed in the cranial and caudal ends of the construct.[13] Anchor points placed in intervening segments are translated into the frame - the axial translation technique. This study was aimed to evaluate the result of deformity correction by this technique
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