Dart-throwing motion in patients with scapholunate instability: a dynamic four-dimensional computed tomography study.

  • Moritomo H
  • Apergis E
  • Garcia-Elias M
 et al. 
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This report updates information on wrist dart-throwing (DT) motion, based on the most recent research published on the kinematics, kinetics, and clinical applications of DT motion. A wide range of DT planes exists. "Pure" DT motion is done along an oblique plane that intercepts the coronal and sagittal planes at the zero position, and occurs almost exclusively at the midcarpal joint with near zero scaphoid and lunate motion. "Functional" DT motion such as a hammering is done along an oblique plane that is almost parallel to the pure DT plane, but that has an offset toward the dorsal side. Functional DT rotation has greater scaphoid and lunate motion compared with pure DT motion. Midcarpal arthrodesis adversely affects DT motion compared with radiocarpal arthrodesis. During a DT motion, the mean and peak tendon forces of the flexor carpi ulnaris and the extensor carpi radialis longus were the greatest among wrist motors. By performing a task along the plane of DT motion, the scapholunate (SL) joint was stable and SL ligament elongation was minimal in healthy subjects. However, a more recent study of patients with SL dissociation revealed that DT exercises applied tensile forces on the SL ligament and induced an SL gap. ?? 2014 ASSH r Published by Elsevier, Inc. All rights reserved.

Author-supplied keywords

  • 2014
  • 2015
  • 20th february 2013
  • 2th september 2012
  • 4th march 2013
  • 5
  • 8
  • Biomechanics
  • Scapholunate dissociation
  • Scapholunate ligament
  • Tenodesis
  • Wrist instability
  • accepted
  • accepted in revised form
  • always simple to determine
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  • april 24
  • be received related directly
  • been received or will
  • bone-ligament-bone
  • capsulodesis
  • carpal
  • carpal kinematics
  • center for hand
  • centre hospitalier du valais
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  • dynamic
  • from the
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  • in any form have
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  • instability
  • interosseous ligament
  • june 27
  • kinematics
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  • midcarpal arthrodesis
  • minneapolis
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  • modified brunelli procedure
  • no bene fi ts
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  • received for publication december
  • received for publication february
  • reduction and association of
  • regarding its global treatment
  • review
  • revised
  • romand
  • rotatory subluxation of the
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  • scaphoid and lunate scapholunate
  • scaphoid rotatory subluxation
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  • university of minnesota
  • wrist
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  • wrist ligamentous injury scapholunate

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  • Hisao Moritomo

  • Emmanuel P. Apergis

  • Marc Garcia-Elias

  • Frederick W. Werner

  • Scott W. Wolfe

  • Giorgio A. Giovanni R. Brunelli

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