Results with Zielke Instrumentation for Idiopathic Thoracolumbar and Lumbar Scoliosis

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Abstract
Thirty-one patients (23 adolescent, eight adult) underwent spinal fusions with Zielke instrumentation for idiopathic thoracolumbar and lumbar scoliosis. Their curves averaged 55.2°. In most patients the length of fusion did not extend beyond the major curve. Correction of scoliosis was 82% in adolescents and 59% in the adults. The kyphotic component of the curves was corrected from an average of 21° to 8°. Correction of the spinal vertebra rotation was 46% in the adolescent patients. The tilt angle of the vertebra at the lower end of the curve was reduced significantly. The fusion rate was 93.5%. Two of the adult patients developed pseudarthrosis. Major complications were not encountered. The Zielke instrumentation system in the management of idiopathic thoracolumbar and lumbar scoliosis offers the advantages of a relatively good correction and minimal segment fusion.

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