Long-Term Results of Harrington Instrumentation in Idiopathic Scoliosis

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Abstract
The long-term effect of Harrington instrumentation was investigated using posteroanterior radiographs and computed tomographic measurements preoperatively, postoperatively, and at a mean follow-up at 10.8 years in 33 patients with idiopathic scoliosis. No patient was lost from long-term follow-up. At follow-up, the mean Cobb angle was improved by 23.7 (40%) compared with the preoperative findings. The rotation of the apical vertebra was increased significantly. The rib hump, the translation of the apical vertebra, and the sagittal diameter of the thoracic cage were unchanged. At follow-up, the mean thoracic kyphosis was 17.3, and lumbar lordosis was 22.0. This study demonstrated that the long-term effect of Harrington instrumentation was limited to an improved Cobb angle; no correction of the rotational or sagittal deformities were achieved.

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