A practical treatise on fractures and dislocations . natural position by simply pressing the lower frag-ment forward, as has been my practice in many cases hitherto. the force applied is greater or longer continued the lower frag-ment is displaced backward upon the upper, the periosteum is tornup posteriorly; and there would be impaction, no doubt, if the mus-cles had their normal power of contraction, or if added to the cross-strain there had been the driving force of a fall upon the palm of thehand; and in these cases it was difficult to tilt the lower fragmentforward into line with
A practical treatise on fractures and dislocations . natural position by simply pressing the lower frag-ment forward, as has been my practice in many cases hitherto. the force applied is greater or longer continued the lower frag-ment is displaced backward upon the upper, the periosteum is tornup posteriorly; and there would be impaction, no doubt, if the mus-cles had their normal power of contraction, or if added to the cross-strain there had been the driving force of a fall upon the palm of thehand; and in these cases it was difficult to tilt the lower fragmentforward into line without first relieving the strain upon this periostealligament by the method described by Pilcher. 10th. The characterof the lesions in the opposite wrist of the same cadaver was generallysymmetrical; the same lesion being caused by the same manipulationin one arm as in the other. 11th. Fractures of the radius were producedby forced palmar flexion, but not quite so readily, and the fracturesoccurred a little lower than is usual in a Colless Fracture at base of styloid processof radius, and laceration of annularligament, caused by forced dorsalflexion; in the cadaver. These are the facts as observed by me in the dead-house experiments, and nodoubt they illustrate to some extent the mechanism of this accident as it occursin life ; but it is apparent that in some respects the circumstances differ. Thereis in the case of the cadaver no muscular contraction to give fixedness to thebones, and to displace the fragments after they are separated, or to maintainthem in a position of displacement. The force of sudden impact caused by the 284 FRACTURES OF THE RADIUS. weight of the body in falling is not present. In short, the fractures caused bythe experiments were the result solely of the action of the carpal ligamentsupon the lower ends of the bones; they were fractures by avulsion or cross-strain, while in the examples presented in the living subject they are usually theresult o
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Keywords: ., bookcentury1800, bookdecade1890, booksubjec, booksubjectfractures
