Fig. 1. Representative posteroanterior radiographs of the pre- and post-bracing treatment of the four groups. The left side shows the pre-bracing image and the right shows the post-bracing image. The ^* indicates the apical vertebra. (A) A patient in group A1 with good coronal and rotational correction. (B) A patient in group A2 with poor coronal and good rotational correction. (C) A patient in group B1 with good coronal and poor rotational correction. (D) A patient in group B2 with poor coronal and rotational correction. Numbers in parentheses are the correction rates of the Cobb angle.