In terms of progression potential, what does a lower Risser score indicate?

A lower Risser score indicates a higher potential for progression in scoliosis, primarily because the Risser sign evaluates skeletal maturity through the ossification of the iliac crest. The scoring ranges from 0 to 5, with 0 indicating no ossification and 5 representing full maturity.

In individuals with lower Risser scores, the spine and associated structures are generally in an earlier stage of growth, making them more susceptible to changes as they continue to grow. The likelihood of progression in the curvature of the spine is higher during periods of rapid growth, especially before skeletal maturity is reached. Therefore, a lower score signals an active phase of development that correlates with an increased risk of scoliosis worsening.

As individuals reach full skeletal maturity (higher Risser scores), the potential for curve progression diminishes significantly. Thus, recognizing the implications of a lower Risser score helps in assessing the need for closer monitoring and possible intervention in patients with scoliosis.