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Changes of three-dimensional back contour following posterior fusion for idiopathic scoliosis.

Twenty-nine patients received both pre and post operative Quantec evaluation (Raster stereophotograph) and spinal radiography. Mean age at surgery was 13.9 years and mean age at follow-up was 15.9 year old. Patients have been followed at least 6 months post-surgically, ranging from 6 months to 5 years. The study found that except for an improvement of Cobb angles (from 49.64 degrees to 24.81 degrees in the thoracic; from 56.08 degrees to 20.08 degrees in the thoracolumbar), corrections of rib hump (from 16.88 to 11.40 vs. normal range 0 to 10.) and truncal asymmetry (from 36.97 to 21.92 vs. normal range 5 to 20) are critical factors in successful spinal surgery.