Combined VDS and Harrington instrumentation for treatment of idiopathic double major curves.

The authors reviewed the results of the combined ventral derotation system (VDS) and Harrington operation in 34 selected patients with idiopathic scoliosis and kyphoscoliosis of double major curve pattern. The use of both VDS and Harrington instrumentation gives better correction and stabilization of the particular curves. It is thought that a greater degree of correction can be obtained in the lumbar curve, thus putting the spine into balance and correcting the kyphosis. The L4 could be centralized and made horizontal, in most operated cases, above the midsacrum. Another useful advantage of the combined procedure is "saving" lower lumbar functional segments.