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Article
December 12, 1914

THE MECHANICS OF A PLASTER-OF-PARIS CAST IN FIXED LATERAL CURVATURE OF THE SPINE

JAMA. 1914;LXIII(24):2119-2122. doi:10.1001/jama.1914.02570240037010
Abstract

It is absolutely necessary to know the exact position of the anatomic parts entering into a deformity in order to correct it. Overcorrection or the reversal of the deformity is necessary to effect a cure. Overcorrection is obtained by pushing the parts back through the same arc which they passed when the deformity developed, and thence through a similar arc to a position exactly opposite to that of the original.

In order to know through what arc the parts travel in the development of a deformity, they must be traced from their normal positions to that of the deformed.

Scoliosis is developed from a normal physiologic position and becomes pathologic only when the individual is unable to reverse this position at will. Scoliosis in its beginning and through its development to a certain stage is a position of flexion, plus lateral bending plus rotation of the bodies of the vertebrae

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