Flat back syndrome itself is something that is described in patients who have been treated with Harrington spinal instrumentation in general. For Harrington spinal instrumentation it was actually the first spinal implant itself to correct scoliosis. When it came to the instrumentation of it in general it had a real tendency to flatten out the normal sway of the lumbar located in the spine.
Flatback Syndrome (Kyphosis): Possible Scoliosis Surgery Complication