[A study of scoliotic curve. The importance of extension and vertebral rotation (author's transl)].

The authors consider that scoliotic curves should be studied in the spatial planes, not only in the frontal plane. Lateral views show that the displaced segments of the spine are always an extension even when there is a kypho-scoliosis. This element must be considered when the deformity is about to be reduced or treated by bracing. In the axial plane, the rotational displacement must be measured. In a dorsal curve, there is specific rotation of the upper vertebrae. The measurement of this rotation may make it possible to predict the extent of the curve at the end of growth in cases of spontaneous evolution.