Excessive development of dilantin tissue in some vertebral bodies with insufficient process in others. Anatomical disorders or dysfunction of the paravertebral muscles. Because of this, the load on the spine changes, which leads to kyphotic curvature. Incorrect development of connective tissue and vertebrae, which acquire a triangular shape, which distorts the spine. The deposition of calcium salts in excess in the anterior ligament, due to which it is stretched and wrinkled, which distorts the spine.