From 1980 to 1989, 110 scoliotic patients treated by Harrington system at llacettepe University were selected for this study. But, only 52 patients had satisfactory documents for study follow-up evaluations and were thus included in this search. Twenty-four were males and twenty-eight were females, whose at operation ranged from 6 to 18 years, with an average 12.4 years. 15 of our patients were treated with posterior fusion alone, 28 with a single Harrington distaction rod, 4 with double Harrington rods, 2 with subcutaneous Harrington technique, one with a Harrington rod and sublaminar wiring, one with a Harrington rod and sublaminar wiring, one with anterior and posterior fusion without instrumentation, and one with Dwyer instrument. We found that the Harrington system produces predictable correction of spinal deformity. When compared with other newer systems, it is less difficult, requires less operating time and blood loss to insert, and costs substantially less.