Reliability of the Risser+ grade for assessment of bone maturity in pediatric scoliosis cases: Investigation using standing and supine whole-spine radiograph.

Overall, there was substantial agreement between the Risser+ grades assigned to standing and supine position radiographs. However, disagreement was observed between standing and supine position radiographs assigned Risser+ grades of 2 or 3. Therefore, we have found a wide range in the visibility of iliac apophysis ossification of the iliac depending on the posture, and there are limitations in assessing bone maturity using the Risser+ grade alone. Clinicians should use other evaluation systems, in addition to the Risser+ system, to achieve a more accurate bone maturity assessment, especially for cases with standing position radiographs assigned Risser grades of 2 or 3.