Abstract
Recent interest in reconstruction of the interosseous ligament (IOL) of the forearm
has led to questions concerning optimal placement of the reconstructive graft as well
as the ideal rotational position of the forearm during graft tensioning. We therefore
studied the strain distribution in the IOL to determine which fibers are strained
in different positions of forearm rotation. Five cadaveric human forearms were subjected
to compressive axial load (simulating power grip) and the strain values across the
entire IOL were measured with the forearm in neutral, supination, and pronation. The
strain distribution in the IOL changed with forearm rotation. The highest overall
strain was found in neutral. In neutral and pronation, higher strain was observed
in the proximal region of the IOL. In supination, however, higher average strain was
seen in the distal region of the IOL. These results suggest that a reconstructive
graft placed in the proximal region of the IOL and tensioned in neutral rotation would
provide balanced constraint in different positions of forearm rotation. A graft placed
in the distal region and tensioned in forearm neutral, however, may limit forearm
rotation. (J Hand Surg 2000;25A:1058-1063. Copyright © 2000 by the American Society
for Surgery of the Hand.)
Keywords
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Article info
Publication history
Accepted:
May 26,
2000
Received:
May 19,
2000
Footnotes
*Supported by the Orthopaedic Research and Education Foundation, the Whitaker Foundation, and the Albert B. Ferguson Foundation.
**No benefits in any form have been received or will be received from a commercial party related directly or indirectly to the subject of this article.
★Reprint requests: Matthew M. Tomaino, MD, Musculoskeletal Research Center, Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, PO Box 71199, Pittsburgh, PA 15213.
Identification
Copyright
© 2000 American Society for Surgery of the Hand. Published by Elsevier Inc. All rights reserved.
