Distraction Instrumentation Outcomes in Scoliosis

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The short-term outcomes of a new distraction technique using a small rod spinal instrumentation system (WRIGHTLOCK) are reported for adolescent idiopathic scoliosis. No caudally directed thoracic hooks were used. Seventy-four children aged 11.7 to 17.5 years who underwent consecutive posterior instrumentations are reviewed. Their curves improved from a mean of 55.6° to 22.7° (average of 59.2% correction). At 2.7 years mean follow-up, coronal curves lost an average of 4.2° correction. Overall, there was a mean increase of 4.4° in kyphosis. Children with the most preoperative hy-pokyphosis were afforded the greatest gains in kyphosis. Instrumentation resulted in a mean loss of 8.2° lumbar lordosis. These results compare favorably with published results for other multihook systems.

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