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The Journal of Bone & Joint Surgery British Volume
Vol. 63-B, Issue 4 | Pages 539 - 541
1 Nov 1981
Levy M Goldberg I Fischel R Frisch E Maor P


The Journal of Bone & Joint Surgery British Volume
Vol. 61-B, Issue 3 | Pages 355 - 357
1 Aug 1979
Levy M Fischel R Stern G Goldberg I

Studies derived from analyses of radiographs and dissections of cadaveric wrists have been directed at testing and disproving the commonly held theories that link chip fractures of the os triquetrum with avulsion. The authors found that the mechanism of such injuries involved a chisel action of the ulnar styloid upon the dorsum of the os triquetrum; furthermore, the impact of a fall on the outstretched arm with the hand rigidly held in strong dorsiflexion and ulnar deviation could be forceful enough to fracture the body of the os triquetrum as well. In all cases a striking prolongation of the ulnar styloid, beyond the surface of the ulnar head, was consistently noted.