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JAMA. 1906;XLVII(1):19-20. doi:10.1001/jama.1906.25210010019001f.
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In order to emphasize the anatomic lesion in this dislocation and its bearing on treatment, I make this brief report.

A dislocation of the acromioclavicular joint usually means that the outer end of the clavicle is displaced upward and slightly outward. This dislocation is not very uncommon. It occasions varying degrees of deformity and certain disabling symptoms may be produced by it. Ordinarily it is a dislocation which is readily treated by pads and simple retentive apparatus. At times, however, it is impossible either to reduce the dislocation completely or to hold it reduced. Occasionally the deformity is so great as to be very noticeable.

It seems probable from the observation and experience of Krecke, Poirier, Rieffel and Sheldon,1 1, that the acromioclavicular ligaments are torn in all cases; 2, that the conoid ligament is sometimes torn in incomplete dislocations; 3, that the conoid ligament is always torn in


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