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Suture-Button Device Stabilization Following Ring Finger Ray Amputation: A Comparative Cadaver Study.

Emily N Morgan1,2, Kenneth R Means2, Adrian G Paez2

  • 11 Walter Reed National Military Medical Center, Bethesda, MD, USA.

Hand (New York, N.Y.)
|July 1, 2017
PubMed
Summary
This summary is machine-generated.

A suture-button device effectively closes the gap and angle between metacarpals after ring finger amputation. This method allows early motion without causing digit scissoring, improving outcomes compared to soft tissue repair alone.

Keywords:
TightRopeamputationray amputationsuture-button device

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Area of Science:

  • Orthopedic surgery
  • Hand surgery
  • Biomechanical engineering

Background:

  • Ring finger ray amputation can lead to intermetacarpal instability.
  • Maintaining the space and alignment of adjacent metacarpals is crucial for hand function.
  • Traditional soft tissue repair may not adequately address post-amputation metacarpal instability.

Purpose of the Study:

  • To evaluate the efficacy of a suture-button device in stabilizing the metacarpals after ring finger ray amputation.
  • To compare the suture-button device to soft tissue repair alone in closing the intermetacarpal gap and angle.
  • To assess the risk of malrotation and allow early range of motion.

Main Methods:

  • Ray amputation of the ring finger in 14 cadaver specimens.
  • Initial soft tissue repair of transverse metacarpal ligaments.
  • Cyclic testing to simulate 6 weeks of range of motion.
  • Placement of a suture-button device between long and small finger metacarpals and re-testing.

Main Results:

  • Suture-button device placement significantly reduced the intermetacarpal distance.
  • Metacarpal spacing was maintained after simulated range of motion.
  • The device led to slight convergence of metacarpal angles, preventing clinically relevant scissoring.

Conclusions:

  • The suture-button device offers stable fixation for early range of motion post-amputation.
  • It effectively closes the intermetacarpal gap and angle without causing scissoring.
  • This technique may be superior to soft tissue repair alone for managing ring finger ray amputations.