Lateral curvature of the spine presents itself in two groups: (1) functional curves, and (2) structural curves. The first, I believe to be caused by bad posture because the curve is not present when the patient is recumbent. The second, often called organic or fixed, shows actual change in the normal shape and position of the bodies of the vertebrae, and the curve or curves do not disappear in recumbency. It is the latter group which from the earliest time has been recognized as a deformity of the spine having a tendency to increase. All men who come in contact with structural scoliosis soon learn to appreciate its importance. Experience alone teaches that its end-results are deformities rivaling any others seen in the realm of orthopedic surgery. Experience also teaches its treachery and resistance to all methods of treatment.
The steady progress of many cases of structural scoliosis to the
BREWSTER AH. LATERAL STRUCTURAL CURVATURE OF THE SPINETREATMENT BY MEANS OF THE TURNBUCKLE JACKET AND TURNBUCKLE SHELL. Arch Surg. 1929;18(4):1427-1445. doi:10.1001/archsurg.1929.01140130519034