Summary:We evaluated curve progression after completion of Wilmington brace treatment for adolescent idiopathic scoliosis in 67 patients. Follow‐up ranged from 5 to 13 years. Pretreatment curve magnitudes ranged from 20 to 39°, with a Risser sign of 0 or 1. Sixteen patients (21%) experienced 5‐16° of curve progression after brace treatment was discontinued. For nine of these patients, the final curve magnitude was within 5° of the pretreatment Cobb angle, reflecting a loss of correction achieved during brace treatment. The remaining seven patients had final curve magnitudes measuring 8‐32° greater than the pretreatment Cobb angle.