We reviewed roentgenograms of 17 patients who had been treated with CDI for idiopathic scoliosis, between 1988 and 1995. The correction of each type of scoliosis, using King's classification was good in about 50% of cases. Among the 17 patients, 4 were type II. and of these 4, 2 were unbalanced in the frontal plane after surgery. When we perform selective fusion of the thoracic curve for patients with type II scoliosis in whom the thoracic and lumbar curves are almost equal with a flexibility index less than 25, they tend to be unbalanced after surgery. We believe in these cases it is better to fix the scoliosis from the thoracic to the lumbar curve.
