. A practical treatise on fractures and dislocations. ones are shown in the series of plates(XXXI-XXXVI). Three associated lesions occur frequently enough to be deemed ex-treme additions to the type : fracture of the styloid processes of the radius 764 DISLOCATIONS. and ulna, and Colless fracture. Others—fracture of the cuneiform andof the OS magnum, and mutual crushing of the os magnum and unci-form—probably depend upon variations in the degree and continuation ofthe force. So also with such cases as mine of 1891, above mentioned, andone or two similar ones in which the end of the radius proj
. A practical treatise on fractures and dislocations. ones are shown in the series of plates(XXXI-XXXVI). Three associated lesions occur frequently enough to be deemed ex-treme additions to the type : fracture of the styloid processes of the radius 764 DISLOCATIONS. and ulna, and Colless fracture. Others—fracture of the cuneiform andof the OS magnum, and mutual crushing of the os magnum and unci-form—probably depend upon variations in the degree and continuation ofthe force. So also with such cases as mine of 1891, above mentioned, andone or two similar ones in which the end of the radius projected throughthe skin, in which the semilunar and fragment of the scaphoid preservedtheir relations with the radius, the direction of the violence was up-ward and backward instead of upward and forward. Also fracture ofthe palmar or dorsal edge of the articular surface of the radius hasbeen seen. The symptoms are fairly characteristic. Function is lost because ofpain; the fingers are flexed and an attempt to straighten them causes pain Fig. Midcarpal fracture-dislocation. SL, semilunar. S S, broken scaphoid. Styloidprocessor radius broken. Tracing from steroscopic skiagram. The shading representsthe deeper (dorsal) levels. (Schoch). because of pressure of the tendons on the displaced and broken bonesand on the median nerve. The hand is slightly shifted to the radialside, and the end of the ulna is consequently prominent. The wrist isslightly shortened by the approximation of the os magnum to the radius,and its antero-posterior diameter is increased by the dislocation the semilunar and fragment of the scaphoid, which can be felt as ahard, perhaps movable, prominence or as increased resistance beneaththe flexor tendons. The broad, thick extensor tendons interfere with DISLOCATIONS AT THE WRIST. 765 palpation of the dorsum but sometimes a gap can be felt below the dorsaledge of the radius. The hand may be abnormally movable in bothplanes upon the forearm. The
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfractur, bookyear1912
