One hundred seventy five scoliosis patients have been treated by surgically by using Harrington instrumentation or Dwyer technique at Tokushima University Hospital. Out of them, 68 patients with idiopathic scoliosis has been followed up for the average period of 4 years and 6 month.
In the group of the cases whose curves were corrected with single Harrington distraction rod, 6 degrees of average loss of correction was noticed. Our results showed that combination with the distraction and the compression system is necessary to maintaine the satisfactory correction effect.