Fig. 5

Evolution of Cobb’s angle average in the frontal plane during the follow up of 1 year. Between T0 and T1, we see both for lumbar and thoracic curves a large divergence. The new Lyon brace is much more corrective than the former plaster cast. This difference decreases when checking at 6 months (T2), but there is still a significant difference between the two groups. Between 6 months (T2) and one year (T3), there is again a divergence between the two curves, especially at the thoracic level, which means that the corrective effect continues and modifies the final result. A difference of 5° between the two groups is highly significant