. A practical treatise on fractures and dislocations. Fracture of olecranon, z-ray Fracture of olecranon, z-ray tracing. Another variety of fracture, partial or complete, and produced fromwithin outward, has been spoken of by different writers as theoreticallypossible, but has only recently been observed and described produced it experimentally in the effort to dislocate the ulnabackward by over-extension (extension beyond the straight line) of theforearm. The end of the olecranon is pressed againt the humerus,the lateral ligaments resist the movement, and
. A practical treatise on fractures and dislocations. Fracture of olecranon, z-ray Fracture of olecranon, z-ray tracing. Another variety of fracture, partial or complete, and produced fromwithin outward, has been spoken of by different writers as theoreticallypossible, but has only recently been observed and described produced it experimentally in the effort to dislocate the ulnabackward by over-extension (extension beyond the straight line) of theforearm. The end of the olecranon is pressed againt the humerus,the lateral ligaments resist the movement, and the prolongation of theeffort results in fracture of the olecranon or, much more commonly, ofthe thinner and weaker shaft of the ulna. Quintin2 reports threecases of incomplete fracture of the olecranon ; the surface articulatingwith the humerus was broken, the dorsal portion was unbroken ; in all 1 Pingaud: Diet. Encylopedique, art. Coude, pp. 517 and 2 Quintin : Beitrag zur Lehre von den Briichen des Olekranon, Bonn, 1881, Abstract inCentralblatt fur Chirurgie, 1881, p. 763. PLATE XIII.
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