Test 2

The Risser classification is a system which grades skeletal maturity based upon the degree of fusion of the iliac crest apophyses. This can be used as a surrogate marker for skeletal maturity and the ossification of the vertebrae which generally parallels that of the iliac crest. The higher the Risser grade, the greater the skeletal maturity. As such, this can be used to predict the progression of scoliosis based on the amount of skeletal maturation that remains and may be used when planning corrective spinal surgery.