This study was undertaken to evaluate the amount of disc and vertebral body wedging in scoliosis, as well as how the wedging changed over the progression of the scoliosis curve. The degree of vertebra and disc wedging was evaluated in fourteen patients with scoliosis by means of PA radiographs which were obtained early in the course of their scoliosis and late in the progression, prior to surgery. Each vertebral body endplate on the PA film was marked with a horizontal line corresponding to the inclination of the vertebra. Each of the lines was then digitized and the wedge angle of the vertebra and of the disc was calculated. Comparisons were made between the earlier and later curves for the apical five vertebra (Apex ± 2). Among the 70 vertebrae examined, later curves showed a statistically greater wedge angle of the vertebra than the disc. The findings of this study show that early in the scoliotic deformity, the wedging of the vertebra and the disc occur in equal proportions. However, as the curve progresses, the vertebra becomes more wedged with respect to the disc.