Fig. 5.

Schematic representation of the different treatment options for scoliosis based on the skeletal maturity of the patients and their curve magnitude. The blue lines represent the Duval-Beaupère evolution of three different evolutive curve patterns, while the thick dotted black line represents the start of growth spurts. The ideal VBT curve is the one already severe (<40°) at Risser 0. Other patients have slower-evolving curves that are not severe enough at Risser 0, but will cross the 40–45° threshold later. These patients will require either PSF or ASC, depending on curve type and flexibility.