. A radiographic atlas of the pathologic changes of bones and joints . PLATE LVI. 158- PLATE LVII. LOOSE SEMI-LUNAR CARTILAGE. This Plate sliows a loose outer semi-lunar cartilage slightly dislocatedinwards. The dislocation inwards of the external semi-lunar cartilage of thetibia can be distinctly made out. The separation between the loose semi-lunar cartilage and the upper endof the tibia is well PLATE LVII. — i6i PART , DISLOCATIONS, FOREIGN BODIES. FRACTURES. In establishing the diagnosis of fracture two skiagrams of theaffected part should always be made whenever this
. A radiographic atlas of the pathologic changes of bones and joints . PLATE LVI. 158- PLATE LVII. LOOSE SEMI-LUNAR CARTILAGE. This Plate sliows a loose outer semi-lunar cartilage slightly dislocatedinwards. The dislocation inwards of the external semi-lunar cartilage of thetibia can be distinctly made out. The separation between the loose semi-lunar cartilage and the upper endof the tibia is well PLATE LVII. — i6i PART , DISLOCATIONS, FOREIGN BODIES. FRACTURES. In establishing the diagnosis of fracture two skiagrams of theaffected part should always be made whenever this is of these must be an antero-posterior view of the limb, andthe other a lateral view. No exception to this rule should bemade when skiagraphing the wrist and hand. The practice totake a palmar and then a dorsal view is faulty. The second ex-posure in every instance should be made with the part lying ina position which is at right angles to that assumed during thefirst exposure. In that way alone accurate information can be obtained aboutthe nature of the fracture, the position of the fragments and theformation of callous, and, in some rare cases, the presence of afracture. One view may show the fragments in apparently perfect op-position, while the other shows considerable displacement (PlatesLVIII and LIX). Or one view may show a fracture, and theother view shows none (Plates LX a
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